Pada jalur utama Jalan Tol Pekanbaru-Dumai ada beberapa lokasi bersinggungan dengan jaringan pipa dan jaringan listrik milik PT Pertamina Hulu Rokan. Oleh karenanya metode pelaksanaan konstruksi jalan tol ini perlu direncanakan secara integrasi pihak-pihak terkait berkaitan dengan operasi pemeliharaan jalan tol tersebut. Badan Usaha Jalan Tol Indonesia wajib memenuhi Syarat Pelayanan Minimal. Pembangunan jalan tol Pekanbaru-Dumai menggunakan teknologi Corrugated Steel Plate (CSP) dan mortar busa guna mengantisipasi titik singgung dengan jaringan pipa dan jaringan listrik, serta underpass perlintasan kawanan gajah. Penelitian ini bertujuan menganalisis apakah teknologi yang dipilih dalam konstruksi jalan tol mempengaruhi operasi dan pemeliharaan jalan tol ini. Penelitian dilakukan dengan studi literatur dan wawancara. Simpulan yang didapat dalam penelitian ini teknologi CSP, teknologi mortar busa, dan underpass gajah tidak mempengaruhi operasi jalan tol. Sementara itu jaringan pipa minyak memberi pengaruh operasi yang tidak signifikan. Underpass gajah, teknologi CSP, mortar busa, dan jaringan pipa minyak membutuhkan pemeliharaan berupa inspeksi rutin dan berkala. Underpass gajah juga membutuhkan pemeliharaan tanaman dan pemeliharaan drainase. Oleh karena Jalan Tol Pekanbaru-Dumai baru beroperasi mulai tahun 2022, operator jalan tol wajib mencatat data inspeksi dengan lengkap dan berkesinambungan agar manajemen operasi dan pemeliharaan dapat dilaksanakan sesuai dengan rencana jangka panjang.
{"title":"Studi Manajemen Operasi dan Pemeliharaan Jalan Tol Pekanbaru-Dumai","authors":"Widyasari Indraningsih Putriani, Theresita Herni Setiawan","doi":"10.26593/josc.v3i1.6938","DOIUrl":"https://doi.org/10.26593/josc.v3i1.6938","url":null,"abstract":"Pada jalur utama Jalan Tol Pekanbaru-Dumai ada beberapa lokasi bersinggungan dengan jaringan pipa dan jaringan listrik milik PT Pertamina Hulu Rokan. Oleh karenanya metode pelaksanaan konstruksi jalan tol ini perlu direncanakan secara integrasi pihak-pihak terkait berkaitan dengan operasi pemeliharaan jalan tol tersebut. Badan Usaha Jalan Tol Indonesia wajib memenuhi Syarat Pelayanan Minimal. Pembangunan jalan tol Pekanbaru-Dumai menggunakan teknologi Corrugated Steel Plate (CSP) dan mortar busa guna mengantisipasi titik singgung dengan jaringan pipa dan jaringan listrik, serta underpass perlintasan kawanan gajah. Penelitian ini bertujuan menganalisis apakah teknologi yang dipilih dalam konstruksi jalan tol mempengaruhi operasi dan pemeliharaan jalan tol ini. Penelitian dilakukan dengan studi literatur dan wawancara. Simpulan yang didapat dalam penelitian ini teknologi CSP, teknologi mortar busa, dan underpass gajah tidak mempengaruhi operasi jalan tol. Sementara itu jaringan pipa minyak memberi pengaruh operasi yang tidak signifikan. Underpass gajah, teknologi CSP, mortar busa, dan jaringan pipa minyak membutuhkan pemeliharaan berupa inspeksi rutin dan berkala. Underpass gajah juga membutuhkan pemeliharaan tanaman dan pemeliharaan drainase. Oleh karena Jalan Tol Pekanbaru-Dumai baru beroperasi mulai tahun 2022, operator jalan tol wajib mencatat data inspeksi dengan lengkap dan berkesinambungan agar manajemen operasi dan pemeliharaan dapat dilaksanakan sesuai dengan rencana jangka panjang.","PeriodicalId":14418,"journal":{"name":"International Journal of Sustainable Construction Engineering and Technology","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136105511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Proyek konstruksi semakin hari semakin berkembang pesat di era industri modern. Pada pelaksanaannya, proyek konstruksi memerlukan banyak sumber daya, seperti peralatan, tenaga kerja, material, dan keuangan. Salah satu hal yang paling penting dalam suatu proyek konstruksi adalah keuangan terutama arus kas (cash flow). Banyak kontraktor mengalami kegagalan karena tidak menganalisis arus kas sehingga berdampak pada keterlambatan penyelesaian proyek konstruksi dan pembengkakan biaya konstruksi. Tulisan ini bertujuan untuk melakukan systematic literature review atas studi-studi terdahulu. Ada dua pertanyaan penelitian yang akan dijawab yaitu apa faktor-faktor utama yang mempengaruhi arus kas proyek konstruksi dan bagaimana dampak analisis arus kas terhadap penyelesaian proyek konstruksi. Berdasarkan kajian, kekuatan finansial klien yang akan mempengaruhi keterlambatan pembayaran dan faktor uang muka akan mempengaruhi risiko keuangan kontraktor. Pengaruh dari analisis arus kas akan memberikan dampak terhadap keuangan kontraktor dalam menyelesaikan proyek konstruksi di antaranya adalah tidak terjadinya pembengkakan biaya proyek konstruksi dan keterlambatan proyek konstruksi.
{"title":"Pengaruh Analisis Arus Kas dalam Proyek Konstruksi: Tinjauan Literatur Sistematis","authors":"Raymond Nicander Salim","doi":"10.26593/josc.v3i1.6961","DOIUrl":"https://doi.org/10.26593/josc.v3i1.6961","url":null,"abstract":"Proyek konstruksi semakin hari semakin berkembang pesat di era industri modern. Pada pelaksanaannya, proyek konstruksi memerlukan banyak sumber daya, seperti peralatan, tenaga kerja, material, dan keuangan. Salah satu hal yang paling penting dalam suatu proyek konstruksi adalah keuangan terutama arus kas (cash flow). Banyak kontraktor mengalami kegagalan karena tidak menganalisis arus kas sehingga berdampak pada keterlambatan penyelesaian proyek konstruksi dan pembengkakan biaya konstruksi. Tulisan ini bertujuan untuk melakukan systematic literature review atas studi-studi terdahulu. Ada dua pertanyaan penelitian yang akan dijawab yaitu apa faktor-faktor utama yang mempengaruhi arus kas proyek konstruksi dan bagaimana dampak analisis arus kas terhadap penyelesaian proyek konstruksi. Berdasarkan kajian, kekuatan finansial klien yang akan mempengaruhi keterlambatan pembayaran dan faktor uang muka akan mempengaruhi risiko keuangan kontraktor. Pengaruh dari analisis arus kas akan memberikan dampak terhadap keuangan kontraktor dalam menyelesaikan proyek konstruksi di antaranya adalah tidak terjadinya pembengkakan biaya proyek konstruksi dan keterlambatan proyek konstruksi.","PeriodicalId":14418,"journal":{"name":"International Journal of Sustainable Construction Engineering and Technology","volume":"33 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136105512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pada awal tahun 2019 hingga awal tahun 2022, seluruh dunia mengalami pandemi penyakit menular dengan tingkat fatality rate yang tinggi, yaitu COVID-19. Tingkat jumlah kematian akibat COVID-19 semakin menurun, sehingga kebijakan Pemberlakuan Pembatasan Kegiatan Masyarakat (PPKM) dicabut oleh Pemerintah, namun tetap harus menaati Protokol Kesehatan untuk semua pekerja, tidak terkecuali pekerja sektor konstruksi. Mempertimbangkan bahwa penyakit menular varian COVID-19 masih akan terus beredar di masyarakat dan menjadi bagian risiko yang akan dihadapi oleh pekerja konstruksi, maka perlu adanya suatu perbandingan standar dan kriteria yang komprehensif untuk mengkritik peraturan protokol kesehatan di Indonesia dalam memitigasi penyakit menular serupa COVID-19, dengan studi kasus pada pelaksanaan peraturan protokol kesehatan COVID-19 di Indonesia. Penelitian ini mengkaji dan mengidentifikasi perbedaan standar tata laksana protokol kesehatan (studi kasus COVID-19) di sektor konstruksi yang digunakan di Indonesia dan dibandingkan terhadap standar pelaksanaan protokol kesehatan internasional dan standar mancanegara seperti Australia, Malaysia, dan Singapura. Penelitian ini diharapkan akan memberikan rekomendasi serta kritik perbaikan yang dapat dilakukan untuk pelaksanaan protokol kesehatan pada penyakit menular di sektor konstruksi Indonesia di masa yang akan datang.
{"title":"Tinjauan Standar Protokol Kesehatan Penyakit Menular Sektor Konstruksi: Studi Kasus COVID-19","authors":"Ratih Dewi Shima","doi":"10.26593/josc.v3i1.6653","DOIUrl":"https://doi.org/10.26593/josc.v3i1.6653","url":null,"abstract":"Pada awal tahun 2019 hingga awal tahun 2022, seluruh dunia mengalami pandemi penyakit menular dengan tingkat fatality rate yang tinggi, yaitu COVID-19. Tingkat jumlah kematian akibat COVID-19 semakin menurun, sehingga kebijakan Pemberlakuan Pembatasan Kegiatan Masyarakat (PPKM) dicabut oleh Pemerintah, namun tetap harus menaati Protokol Kesehatan untuk semua pekerja, tidak terkecuali pekerja sektor konstruksi. Mempertimbangkan bahwa penyakit menular varian COVID-19 masih akan terus beredar di masyarakat dan menjadi bagian risiko yang akan dihadapi oleh pekerja konstruksi, maka perlu adanya suatu perbandingan standar dan kriteria yang komprehensif untuk mengkritik peraturan protokol kesehatan di Indonesia dalam memitigasi penyakit menular serupa COVID-19, dengan studi kasus pada pelaksanaan peraturan protokol kesehatan COVID-19 di Indonesia. Penelitian ini mengkaji dan mengidentifikasi perbedaan standar tata laksana protokol kesehatan (studi kasus COVID-19) di sektor konstruksi yang digunakan di Indonesia dan dibandingkan terhadap standar pelaksanaan protokol kesehatan internasional dan standar mancanegara seperti Australia, Malaysia, dan Singapura. Penelitian ini diharapkan akan memberikan rekomendasi serta kritik perbaikan yang dapat dilakukan untuk pelaksanaan protokol kesehatan pada penyakit menular di sektor konstruksi Indonesia di masa yang akan datang.","PeriodicalId":14418,"journal":{"name":"International Journal of Sustainable Construction Engineering and Technology","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136105513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pemberlakuan tarif sangat murah belum mampu menarik minat masyarakat untuk memanfaatkannya. Hal ini menunjukkan bahwa tarif bukan merupakan faktor penentu minat masyarakat terhadap angkutan umum. Faktor pendorong minat masyarakat Bandar Lampung terhadap angkutan umum diteliti dengan menggunakan metode Structural Equation Modeling (SEM). Instrument penelitian berupa kuesioner dengan pertanyaan-pertanyaan yang disusun berdasarkan pendekatan teoritis dan disajikan dalam Google Form. Pendekatan yang digunakan adalah bahwa variabel minat adalah variabel laten yang dapat diukur melalui faktor-faktor yang menimbulkan minat itu sendiri. Penelitian dilakukan di Kota Bandar Lampung terhadap masyarakat pada rentang umur 15-60 tahun. Sampel diambil secara accidental random sampling. Kuisioner disebarkan melalui aplikasi perpesanan WhatsApp. Jumlah sampel sebanyak 348 responden untuk mewakili populasi 785.450 jiwa dengan taraf kesalahan sebesar 5%. Hasil kuisioner diestimasi dengan alat bantu AMOS 23 (trial version). Hasil estimasi menunjukkan bahwa faktor penarik berupa perbaikan dalam kemudahan menjangkau layanan, memperbaiki pelayanan angkutan umum, dan menyediakan sistem pembayaran yang terintegrasi adalah faktor yang paling dominan dalam menentukan minat masyarakat untuk beralih ke angkutan umum. Dari hasil tersebut diajukan rekomendasi untuk memperbaiki faktor-faktor penarik untuk menarik minat masyarakat beralih ke angkutan umum yaitu dengan memperbaiki keterjangkauan, memperbaiki pelayanan angkutan umum, dan menyediakan sistem pembayaran yang terintegrasi.
{"title":"Preferensi Warga Kota Bandar Lampung Terhadap Angkutan Umum","authors":"Eka Febri Astuti, Rahayu Sulistyorini, Kristianto Usman","doi":"10.26593/josc.v3i1.6849","DOIUrl":"https://doi.org/10.26593/josc.v3i1.6849","url":null,"abstract":"Pemberlakuan tarif sangat murah belum mampu menarik minat masyarakat untuk memanfaatkannya. Hal ini menunjukkan bahwa tarif bukan merupakan faktor penentu minat masyarakat terhadap angkutan umum. Faktor pendorong minat masyarakat Bandar Lampung terhadap angkutan umum diteliti dengan menggunakan metode Structural Equation Modeling (SEM). Instrument penelitian berupa kuesioner dengan pertanyaan-pertanyaan yang disusun berdasarkan pendekatan teoritis dan disajikan dalam Google Form. Pendekatan yang digunakan adalah bahwa variabel minat adalah variabel laten yang dapat diukur melalui faktor-faktor yang menimbulkan minat itu sendiri. Penelitian dilakukan di Kota Bandar Lampung terhadap masyarakat pada rentang umur 15-60 tahun. Sampel diambil secara accidental random sampling. Kuisioner disebarkan melalui aplikasi perpesanan WhatsApp. Jumlah sampel sebanyak 348 responden untuk mewakili populasi 785.450 jiwa dengan taraf kesalahan sebesar 5%. Hasil kuisioner diestimasi dengan alat bantu AMOS 23 (trial version). Hasil estimasi menunjukkan bahwa faktor penarik berupa perbaikan dalam kemudahan menjangkau layanan, memperbaiki pelayanan angkutan umum, dan menyediakan sistem pembayaran yang terintegrasi adalah faktor yang paling dominan dalam menentukan minat masyarakat untuk beralih ke angkutan umum. Dari hasil tersebut diajukan rekomendasi untuk memperbaiki faktor-faktor penarik untuk menarik minat masyarakat beralih ke angkutan umum yaitu dengan memperbaiki keterjangkauan, memperbaiki pelayanan angkutan umum, dan menyediakan sistem pembayaran yang terintegrasi.","PeriodicalId":14418,"journal":{"name":"International Journal of Sustainable Construction Engineering and Technology","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136105509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Provinsi Lampung merupakan daerah yang memiliki frekuensi kereta api yang cukup padat. Untuk meningkatkan pelayanan KA, pemerintah berencana meningkatkan fasilitas melalui pembangunan segmen Tanjungkarang-Kotabumi. Sebelum masuk ke tahap pembangunan tentunya harus ada analisis kelayakan terlebih dahulu baik dari aspek kelayakan ekonomi maupun finansial. Hal tersebut dimaksudkan untuk mengetahui apakah jalur ganda ini layak atau tidak dilanjutkan ke tahap selanjutnya. Penelitian ini menitikberatkan pada kajian tekno ekonomi dengan menggunakan parameter NPV, IRR dan BCR sehingga dapat diambil kesimpulan bahwa pengembalian modal pada pembangunan jalur ganda ini berkisar antara 7 dan 13 tahun. Kajian ini dimulai dari mengumpulkan data, kemudian menghitung estimasi biaya proyek, lalu analisis data dan dilanjutkan pada analisis kelayakan ekonomi dan finansial sehingga menghasilkan 12 skenario dengan berbagai asumsi. Dari 12 skenario didapatkan hasil terbaik pada skenario optimis 4 dengan asumsi nilai tingkat inflasi 3%, dan Track Access Charges 40% menunjukkan nilai NPV, IRR, dan BCR sebesar Rp23.572.331.832.990; 26,03%; dan 4,40. Dari 12 skenario telah menunjukkan bahwa semuanya telah mencapai syarat layak ekonomi dan finansial yaitu NPV>0, IRR>Rate of Return, dan BCR>1 dan dinyatakan bahwa proyek pembangunan jalur ganda rel kereta api Tanjungkarang-Kotabumi ini layak dilanjutkan ke tahap DED karena memberikan kontribusi besar untuk negara.
{"title":"Kajian Tekno Ekonomi pada Pembangunan Jalur Ganda Rel Kereta Api Segmen Tanjungkarang-Kotabumi di Provinsi Lampung","authors":"Reta Mayola Juwindi, Kristianto Usman, Amril Siregar, Tas'an Junaedi","doi":"10.26593/josc.v3i1.6630","DOIUrl":"https://doi.org/10.26593/josc.v3i1.6630","url":null,"abstract":"Provinsi Lampung merupakan daerah yang memiliki frekuensi kereta api yang cukup padat. Untuk meningkatkan pelayanan KA, pemerintah berencana meningkatkan fasilitas melalui pembangunan segmen Tanjungkarang-Kotabumi. Sebelum masuk ke tahap pembangunan tentunya harus ada analisis kelayakan terlebih dahulu baik dari aspek kelayakan ekonomi maupun finansial. Hal tersebut dimaksudkan untuk mengetahui apakah jalur ganda ini layak atau tidak dilanjutkan ke tahap selanjutnya. Penelitian ini menitikberatkan pada kajian tekno ekonomi dengan menggunakan parameter NPV, IRR dan BCR sehingga dapat diambil kesimpulan bahwa pengembalian modal pada pembangunan jalur ganda ini berkisar antara 7 dan 13 tahun. Kajian ini dimulai dari mengumpulkan data, kemudian menghitung estimasi biaya proyek, lalu analisis data dan dilanjutkan pada analisis kelayakan ekonomi dan finansial sehingga menghasilkan 12 skenario dengan berbagai asumsi. Dari 12 skenario didapatkan hasil terbaik pada skenario optimis 4 dengan asumsi nilai tingkat inflasi 3%, dan Track Access Charges 40% menunjukkan nilai NPV, IRR, dan BCR sebesar Rp23.572.331.832.990; 26,03%; dan 4,40. Dari 12 skenario telah menunjukkan bahwa semuanya telah mencapai syarat layak ekonomi dan finansial yaitu NPV>0, IRR>Rate of Return, dan BCR>1 dan dinyatakan bahwa proyek pembangunan jalur ganda rel kereta api Tanjungkarang-Kotabumi ini layak dilanjutkan ke tahap DED karena memberikan kontribusi besar untuk negara.","PeriodicalId":14418,"journal":{"name":"International Journal of Sustainable Construction Engineering and Technology","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136105510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-28DOI: 10.38007/ijetc.2023.040204
: Carbon dioxide capture and sequestration has attracted widespread interest worldwide due to greenhouse effect. Geological uncertainties affect final decisions of the injection work. Optimizing injection work under geological parameters can maximize the carbon dioxide injection efficiency and minimize the difference between the carbon dioxide storage target and actual injection volume. This work introduces an optimization workflow for decisions. It is composed of three steps. At first, generating samples as the initial data sets by using Latin Hypercube Sampling method. Secondly, a data-driven model is deployed to simulate the fluid movement in the reservoir using the samples generated in step 1. The surrogate model is optimized by tuning hyper parameters in neural networks and applying K-fold validation, which can mitigate the limitations of high-fidelity simulations. After optimization, the surrogate model is validated using full reservoir simulation. At last, with the help of genetic algorithm, both the critical pressure area and CO2 plume area reduce largely, and CO2 injection volume increases by 115*103 m3. This optimization can largely enhance CO2 sequestration efficiency. It introduces an efficient workflow to provide a reference to the decision-making process of CO2 injection location.
{"title":"An Integrated Machining Learning-Based Workflow for CO2 Sequestration Optimization under Geological Uncertainty","authors":"","doi":"10.38007/ijetc.2023.040204","DOIUrl":"https://doi.org/10.38007/ijetc.2023.040204","url":null,"abstract":": Carbon dioxide capture and sequestration has attracted widespread interest worldwide due to greenhouse effect. Geological uncertainties affect final decisions of the injection work. Optimizing injection work under geological parameters can maximize the carbon dioxide injection efficiency and minimize the difference between the carbon dioxide storage target and actual injection volume. This work introduces an optimization workflow for decisions. It is composed of three steps. At first, generating samples as the initial data sets by using Latin Hypercube Sampling method. Secondly, a data-driven model is deployed to simulate the fluid movement in the reservoir using the samples generated in step 1. The surrogate model is optimized by tuning hyper parameters in neural networks and applying K-fold validation, which can mitigate the limitations of high-fidelity simulations. After optimization, the surrogate model is validated using full reservoir simulation. At last, with the help of genetic algorithm, both the critical pressure area and CO2 plume area reduce largely, and CO2 injection volume increases by 115*103 m3. This optimization can largely enhance CO2 sequestration efficiency. It introduces an efficient workflow to provide a reference to the decision-making process of CO2 injection location.","PeriodicalId":14418,"journal":{"name":"International Journal of Sustainable Construction Engineering and Technology","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135427599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-21DOI: 10.30880/ijscet.2023.14.03.011
Mohd Norazam Yasin, Ruzaimah Razman, Sasitharan Nagapan, Farzaneh Moayedi
When it comes to the operation of a construction industry, building maintenance is critical. Any structure must be well-maintained to prevent minor problems from becoming major ones. Delayed building maintenance may result in increased repair costs as well as a reduction in building lifespan. To avoid this problem, research has been conducted to identify the factors that cause building maintenance delays and mitigation measures to resolve building maintenance delays. To achieve the study's objectives, extensive literature research and a questionnaire survey were conducted. Based on previous literature research, accumulated data was used to create a questionnaire for 250 Malaysian building maintenance delay factors and mitigation measures. A group of professionals and experts, including top management, project managers, engineers, architects, assistant engineers, technicians, human resources and administration, and others, participated in this survey. SPSS statistical software was used to analyse the collected data using the average mean index method and correlation. According to the data, the three highest mean index values from the factors that cause maintenance work delays are an increase in maintenance costs as the building age increases, an incorrect timing for work can incur higher maintenance costs when a critical job item is overlooked, and improper planning and budgeting. For correlation analysis, it was found that the correlations amongst the five groups of delay factors are having strong relationship with Pearson correlation value of 0.5. While for mitigation measures of the delay, it was found that three highest ranks are prefer other organizational structure follows by policy and objective and good communication. The findings can assist construction practitioners in prioritising their maintenance works.
{"title":"Assessing Delay Factors and Mitigation Measures in Building Maintenance Works","authors":"Mohd Norazam Yasin, Ruzaimah Razman, Sasitharan Nagapan, Farzaneh Moayedi","doi":"10.30880/ijscet.2023.14.03.011","DOIUrl":"https://doi.org/10.30880/ijscet.2023.14.03.011","url":null,"abstract":"When it comes to the operation of a construction industry, building maintenance is critical. Any structure must be well-maintained to prevent minor problems from becoming major ones. Delayed building maintenance may result in increased repair costs as well as a reduction in building lifespan. To avoid this problem, research has been conducted to identify the factors that cause building maintenance delays and mitigation measures to resolve building maintenance delays. To achieve the study's objectives, extensive literature research and a questionnaire survey were conducted. Based on previous literature research, accumulated data was used to create a questionnaire for 250 Malaysian building maintenance delay factors and mitigation measures. A group of professionals and experts, including top management, project managers, engineers, architects, assistant engineers, technicians, human resources and administration, and others, participated in this survey. SPSS statistical software was used to analyse the collected data using the average mean index method and correlation. According to the data, the three highest mean index values from the factors that cause maintenance work delays are an increase in maintenance costs as the building age increases, an incorrect timing for work can incur higher maintenance costs when a critical job item is overlooked, and improper planning and budgeting. For correlation analysis, it was found that the correlations amongst the five groups of delay factors are having strong relationship with Pearson correlation value of 0.5. While for mitigation measures of the delay, it was found that three highest ranks are prefer other organizational structure follows by policy and objective and good communication. The findings can assist construction practitioners in prioritising their maintenance works.","PeriodicalId":14418,"journal":{"name":"International Journal of Sustainable Construction Engineering and Technology","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136240121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-21DOI: 10.30880/ijscet.2023.14.03.003
Ahmad Haqqi Nazali Abdul Razak, Nur Azfahani Ahmad, Paola Leardini
The smart grid revolution has benefited many sectors but the potential for design optimization among residential units has yet to be explored. Despite some researchers having negative perception of house design's association with the smart grid system, there is in fact potential for investigating design attribute optimisation aligned with the smart grid system. As electricity becomes a necessity of the 21st century society, residential dwellers are becoming more dependent on this indispensable source of energy. As such, this paper explains the development of a framework focusing on design optimization for residential units aligned to the smart grid system using the Fuzzy Delphi Method approach. It focuses on the significant smart grid components linked to the residential sector incorporating key design attributes for energy optimization purposes. The proposed framework denoted two main components of residential design optimization, depicted as indoor and outdoor parameters with its subsequent attributes further categorised into main and detailed components. Twelve design parameters were found to be substantial for the DOfSG development, intended to provide useful guide for aligning residential design towards the smart grid system in Malaysia.
{"title":"Development of Design Optimization for Smart Grid (DOfSG) Framework for Residential Energy Efficiency via Fuzzy Delphi Method (FDM) Approach","authors":"Ahmad Haqqi Nazali Abdul Razak, Nur Azfahani Ahmad, Paola Leardini","doi":"10.30880/ijscet.2023.14.03.003","DOIUrl":"https://doi.org/10.30880/ijscet.2023.14.03.003","url":null,"abstract":"The smart grid revolution has benefited many sectors but the potential for design optimization among residential units has yet to be explored. Despite some researchers having negative perception of house design's association with the smart grid system, there is in fact potential for investigating design attribute optimisation aligned with the smart grid system. As electricity becomes a necessity of the 21st century society, residential dwellers are becoming more dependent on this indispensable source of energy. As such, this paper explains the development of a framework focusing on design optimization for residential units aligned to the smart grid system using the Fuzzy Delphi Method approach. It focuses on the significant smart grid components linked to the residential sector incorporating key design attributes for energy optimization purposes. The proposed framework denoted two main components of residential design optimization, depicted as indoor and outdoor parameters with its subsequent attributes further categorised into main and detailed components. Twelve design parameters were found to be substantial for the DOfSG development, intended to provide useful guide for aligning residential design towards the smart grid system in Malaysia.","PeriodicalId":14418,"journal":{"name":"International Journal of Sustainable Construction Engineering and Technology","volume":"160 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136240377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aquatic ecosystems offer several ecosystem services, including water purification, nutrient recycling, flood reduction, groundwater recharge, irrigation, and animal habitats. One of the most prevalent challenges freshwater systems face globally is eutrophication. Eutrophication refers to the process of increasing the concentration of plant nutrients in water. The Carlson's Trophic State Index (CTSI) categorises an aquatic environment's eutrophication condition. The parameters exclusively employ three water quality parameters, which are Secchi Disc Transparency (SD), Total Phosphorus (TP), and Chlorophyll-a (Chl-a). Biological indicators refer to living organisms, such as plants and macroinvertebrates, that are implemented to identify and assess the presence of pollutants within a specific ecosystem. Therefore, this study focuses on the determination of trophic state and the assessment of biological indicators of Tasik Kemajuan. Water samples were collected for nine weeks using the composite sampling method for laboratory analysis. Water transparency was determined using a Secchi Disc. The Chl-a was determined by using the determination of chlorophyll-a using 90% methanol and measuring the absorption using a Hach DR6000 UV VIS Spectrophotometer at 663 nm and 750 nm, while the Total Phosphorus was determined by using USEPA1 PhosVer® 3 with Acid Persulfate Digestion Method (Method 8190). Tasik Kemajuan exhibited eutrophic conditions over the duration of the nine-week period. The CTSI values exhibited a range of 60 to 80, thereby demonstrating that the water body under consideration is in a state of eutrophication. The Red Claw Crawfish (Cherax Quadricarinatus), Amona Prawn (Caridina Multidentata), Freshwater Snail (Viviparidae), Tiger Barb (Puntius Tetrazona), and Waterlily (Nymphaeaceae) are among the biological indicators found in Tasik Kemajuan. In conclusion, the analysis of the result shows that the Tasik Kemajuan is in an eutrophic condition, which has high amounts of algae growth, and the bottom waters are seriously depleted in oxygen.
{"title":"Water Quality Monitoring for Trophic State of Tasik Kemajuan, Universiti Tun Hussein Onn Malaysia","authors":"Muhammad Hafiq Afifi Azman, Rafidah Hamdan, Zarina Md Ali, Zuhaib Siddiqui","doi":"10.30880/ijscet.2023.14.03.015","DOIUrl":"https://doi.org/10.30880/ijscet.2023.14.03.015","url":null,"abstract":"Aquatic ecosystems offer several ecosystem services, including water purification, nutrient recycling, flood reduction, groundwater recharge, irrigation, and animal habitats. One of the most prevalent challenges freshwater systems face globally is eutrophication. Eutrophication refers to the process of increasing the concentration of plant nutrients in water. The Carlson's Trophic State Index (CTSI) categorises an aquatic environment's eutrophication condition. The parameters exclusively employ three water quality parameters, which are Secchi Disc Transparency (SD), Total Phosphorus (TP), and Chlorophyll-a (Chl-a). Biological indicators refer to living organisms, such as plants and macroinvertebrates, that are implemented to identify and assess the presence of pollutants within a specific ecosystem. Therefore, this study focuses on the determination of trophic state and the assessment of biological indicators of Tasik Kemajuan. Water samples were collected for nine weeks using the composite sampling method for laboratory analysis. Water transparency was determined using a Secchi Disc. The Chl-a was determined by using the determination of chlorophyll-a using 90% methanol and measuring the absorption using a Hach DR6000 UV VIS Spectrophotometer at 663 nm and 750 nm, while the Total Phosphorus was determined by using USEPA1 PhosVer® 3 with Acid Persulfate Digestion Method (Method 8190). Tasik Kemajuan exhibited eutrophic conditions over the duration of the nine-week period. The CTSI values exhibited a range of 60 to 80, thereby demonstrating that the water body under consideration is in a state of eutrophication. The Red Claw Crawfish (Cherax Quadricarinatus), Amona Prawn (Caridina Multidentata), Freshwater Snail (Viviparidae), Tiger Barb (Puntius Tetrazona), and Waterlily (Nymphaeaceae) are among the biological indicators found in Tasik Kemajuan. In conclusion, the analysis of the result shows that the Tasik Kemajuan is in an eutrophic condition, which has high amounts of algae growth, and the bottom waters are seriously depleted in oxygen.","PeriodicalId":14418,"journal":{"name":"International Journal of Sustainable Construction Engineering and Technology","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136240378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-21DOI: 10.30880/ijscet.2023.14.03.014
Izatul Farrita Mohd Kamar, Asmalia Che Ahmad, Mohd Yusof Kasiron
The Klang Valley Mass Rapid Transit (KVMRT) System is set to be one the most important and largest transport infrastructure projects in Malaysia. Since its inception in 2011, the rapid development of the KVMRT System has contributed to a substantial amount of costs related to safety and health issues. Fatalities, serious injuries, and damage to properties have occur every year due to the rapid construction of this project. Work injuries create significant economic and humanitarian consequences to our society, especially to this project where it involves billions of Malaysian Ringgit (RM). The awareness of the accident, especially the payment cost, is absent because the contractors, clients and the consultants leave these matters to the insurance company. They always ignore the indirect costs due to an accident without realising the true losses to them. Therefore, this paper studies the types of indirect costs of accident incurred during the construction of KVMRT Projects. Sixty (60) reported accident cases were examined to measure the level of significance for those items from the safety personnel experiences. The study found that the most significant type of accident contributing to the indirect costs is the Management Cost Component and Accident Report Cost where it involved the cost of the investigation process item until to the preparation of report. The findings of the study may assist stakeholders in estimating the accident costs during construction projects, and, hence, enable them to plan their investments in terms of safety measures in a more insightful manner.
{"title":"Exploring the Direct & Indirect Costs of Accident: An Empirical Analysis for KVMRT Projects in Malaysia","authors":"Izatul Farrita Mohd Kamar, Asmalia Che Ahmad, Mohd Yusof Kasiron","doi":"10.30880/ijscet.2023.14.03.014","DOIUrl":"https://doi.org/10.30880/ijscet.2023.14.03.014","url":null,"abstract":"The Klang Valley Mass Rapid Transit (KVMRT) System is set to be one the most important and largest transport infrastructure projects in Malaysia. Since its inception in 2011, the rapid development of the KVMRT System has contributed to a substantial amount of costs related to safety and health issues. Fatalities, serious injuries, and damage to properties have occur every year due to the rapid construction of this project. Work injuries create significant economic and humanitarian consequences to our society, especially to this project where it involves billions of Malaysian Ringgit (RM). The awareness of the accident, especially the payment cost, is absent because the contractors, clients and the consultants leave these matters to the insurance company. They always ignore the indirect costs due to an accident without realising the true losses to them. Therefore, this paper studies the types of indirect costs of accident incurred during the construction of KVMRT Projects. Sixty (60) reported accident cases were examined to measure the level of significance for those items from the safety personnel experiences. The study found that the most significant type of accident contributing to the indirect costs is the Management Cost Component and Accident Report Cost where it involved the cost of the investigation process item until to the preparation of report. The findings of the study may assist stakeholders in estimating the accident costs during construction projects, and, hence, enable them to plan their investments in terms of safety measures in a more insightful manner.","PeriodicalId":14418,"journal":{"name":"International Journal of Sustainable Construction Engineering and Technology","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136240547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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