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Detecting FNE in Sound Free-choice Petri Net with Data 用数据检测声音自由选择Petri网中的FNE
Pub Date : 2019-06-13 DOI: 10.11648/J.AJOMIS.20190402.11
Fang Zhao
Nowadays, the development of a third-party service (Express industry) and a third-party payment (Alipay) are very fast in online shopping. Despite there are many technologies to detect control flow errors in business process, the soundness verification in data flow is very hard. To support the design of a workflow, we usually consider the correct control flow structure. However, information about data flow should also be ensured correct. The operation of the system may suffer some external attacks, which makes the task change the read and write operations, which result in changing of control flow structure which would lead to the emergence of unusual system. As a result, our approach provides a new technology to analysis the correctness of sound free-choice Petri net with data (SCDN). With the strong concealment of this attack, the system may suffer false-negative data flow errors (FNE), which would bring some loses to the participants. On the basis of behavioral profiles (BP), redundant data flow errors (RDE) and missing data flow errors (MDE), we provide the theory of FNE to demonstrate the stability, effectiveness and adaptation of our detection methods. Finally, a real E-commerce business system is used to illustrate the practicability of the method provided in this paper.
如今,第三方服务(快递业)和第三方支付(支付宝)在网上购物中的发展非常迅速。尽管有许多技术可以检测业务流程中的控制流错误,但数据流的正确性验证非常困难。为了支持工作流的设计,我们通常考虑正确的控制流结构。但是,关于数据流的信息也应该保证正确。系统的运行可能会受到一些外部攻击,使得任务改变读写操作,从而导致控制流结构的改变,从而导致系统异常的出现。因此,我们的方法提供了一种新的技术来分析声音自由选择Petri网(SCDN)的正确性。由于该攻击具有很强的隐蔽性,系统可能出现假负数据流错误(FNE),给参与者带来一定的损失。在行为特征(BP)、冗余数据流错误(RDE)和缺失数据流错误(MDE)的基础上,我们提供了FNE理论来证明我们的检测方法的稳定性、有效性和适应性。最后,以一个实际的电子商务业务系统为例,说明本文方法的实用性。
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引用次数: 0
Coordinated Replenishment Policy in an Assembly System Based on Supply-Hub 基于供应中心的装配系统协同补货策略
Pub Date : 2019-04-26 DOI: 10.11648/J.AJOMIS.20190401.13
Jianhong Yu, J. Shang, Wen-Chyuan Chiang
The synchronization and coordination of material flows is a key element in the supply chain management. To analyze the effects of coordinated replenishment for components, we consider an assembly system with two component-suppliers, one supply-hub and one manufacturer, under stochastic final product demand. We propose three different strategies: (i) the decentralized replenishment, (ii) the coordinated replenishment without coordinated quantity, and (iii) the coordinated replenishment policy with coordinated quantity for infinite planning horizon. We propose optimal decisions for all strategies. Results show that policy (ii) is always better than policy (i). We further identify the conditions under which the third strategy outperforms the other two. Policy (iii) is better on cost saving and service level, only when it satisfies certain conditions. Numerical studies are conducted to validate the model and to derive managerial implications.
物料流的同步和协调是供应链管理的关键要素。为了分析零部件协同补给的效果,我们考虑了一个具有两个零部件供应商,一个供应中心和一个制造商的装配系统,在随机最终产品需求下。我们提出了三种不同的策略:(i)分散补货策略;(ii)不协调数量的协调补货策略;(iii)无限规划视界下协调数量的协调补货策略。我们提出所有策略的最优决策。结果表明,政策(ii)总是优于政策(i)。我们进一步确定了第三种策略优于其他两种策略的条件。只有在满足一定条件的情况下,政策(iii)在节约成本和服务水平上更好。数值研究进行了验证模型,并得出管理意义。
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引用次数: 1
An Optimal Exiting Time for Old Generation Product in Supply Chain 供应链中老一代产品的最优退出时间
Pub Date : 2019-04-18 DOI: 10.11648/J.AJOMIS.20190401.12
Yu Qi, Yongtai Luo
(I) Brief problem description: With technology developing, many series products which have several generations appear in one market. The sales of new and old generations of a product in one market influences each other. (II) The study aim: In order to help the supply chain to obtain more benefits, this paper makes a study on the exiting of old generation products. (III) Method: Based on Fisher model and multi-generation product diffusion model, this paper establishes an optimal decision-making model for the exiting time of old generation product, and analyzes the relationship between the optimal exiting time of the old generation product and the technical level of the new generation product. (IV) Result and conclusion: Observations from this study include (1) when the profit of the new generation product sold only and that of the two generations sold simultaneously are the same, it is the optimal time for old generation product to exit market, and (2) the higher the technical level of new generation product is, the earlier old generation product will exit from market, and the more profit supply chain will get. (V) Significance: The research result will help some company make optimal decision-making for the exiting time of old generation product, and get more profit.
(一)问题简述:随着技术的发展,同一市场上出现了多代多系列产品。新一代和老一代产品在同一市场的销售是相互影响的。(二)研究目的:为了帮助供应链获得更多的利益,本文对老一代产品的退出进行研究。(三)方法:基于费雪模型和多代产品扩散模型,建立了老一代产品退出时间的最优决策模型,分析了老一代产品最优退出时间与新一代产品技术水平的关系。(四)结果与结论:本研究观察到:(1)当只销售新一代产品和同时销售两代产品的利润相同时,是老一代产品退出市场的最佳时间;(2)新一代产品的技术水平越高,老一代产品退出市场的时间越早,供应链获得的利润越多。(五)研究意义:研究结果将有助于某企业对老一代产品的退出时间做出最优决策,从而获得更大的利润。
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引用次数: 0
The Value of Inventory Accuracy in Supply Chain Management: Correlation Between Error Sources and Proactive Error Correction 库存准确性在供应链管理中的价值:误差来源与主动纠错的相关性
Pub Date : 2019-03-01 DOI: 10.11648/j.ajomis.20190401.11
Assaf Avrahami, Evgeni Korchatov
One of the key elements in supplay cahin management is accurate information. Decision makers are aware of inaccuracies in inventory levels and, therefore, routinely conduct inventory reviews to correct the discrepancies between IT records and actual inventory. Several studies have investigated error sources and the cumulative effect of errors on holding costs, shortage costs, order-up-to levels and time between inventory counts. In most works, the errors were independent of the demand, which is neither realistic nor accurate. Here we use familiar inventory errors and information scenarios already proposed in several previous papers. We offer a model that considers the correlation between inventory errors and demand. The effect of the relationship between the random variables is tested in the context of several different scenarios. Each scenario contains a different level of information about the underlying demand and inventory errors. We then analyze the effect of changes of the covariance on the cost and time between inventory counts in each scenario. Using these results we formulate the value of information and its dependence on the covariance. We use analytical methods to draw conclusions regarding single parameter set cases and a numerical full factorial study for average multiparameter cases. In both settings, we show that the value of information decreases as the covariance increases. Moreover, the reduction is more significant when the information scenario makes less assumptions. The same behavior is observed in stock review frequency. As covariance increases, the optimal number of periods between inventory reviews drops sharply. Finally, we propose several simple methods for proactive error correction. We show that without prior knowledge, these methods perform better than the basic information scenario. Using these results we are able to formulate recommendations for businesses with different profiles of correlation between demand, and demand and errors, e.g., automated warehouses with weak correlation compared to grocery stores.
供应链管理的关键要素之一是准确的信息。决策者意识到库存水平的不准确性,因此,定期进行库存检查,以纠正IT记录与实际库存之间的差异。一些研究调查了错误来源和错误对持有成本、短缺成本、订单水平和库存计数之间时间的累积影响。在大多数作品中,误差与需求无关,既不真实,也不准确。这里我们使用熟悉的库存错误和信息场景,这些场景已经在之前的几篇论文中提出过。我们提供了一个模型,考虑库存误差和需求之间的相关性。随机变量之间的关系的影响是在几个不同的情况下进行测试。每个场景都包含关于潜在需求和库存错误的不同级别的信息。然后,我们分析了协方差的变化对每种情况下库存计数之间的成本和时间的影响。利用这些结果,我们表述了信息的价值及其对协方差的依赖。我们用解析的方法得出了关于单参数集情况的结论,并对平均多参数情况进行了数值全因子研究。在这两种情况下,我们表明信息的价值随着协方差的增加而减少。此外,当信息场景做出更少的假设时,这种减少更为显著。在股票审查频率中也观察到同样的行为。随着协方差的增加,库存审查之间的最优周期数急剧下降。最后,我们提出了几种简单的主动纠错方法。我们表明,在没有先验知识的情况下,这些方法比基本信息场景表现得更好。利用这些结果,我们能够为需求和需求与错误之间存在不同相关性的企业制定建议,例如,与杂货店相比,相关性较弱的自动化仓库。
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引用次数: 1
Interactive Advising with Bots: Improving Academic Excellence in Educational Establishments 互动咨询与机器人:提高学术卓越的教育机构
Pub Date : 2018-03-20 DOI: 10.11648/J.AJOMIS.20180301.12
Wilson Nwankwo
Student advising services are often regarded as the mainstream vehicle for promoting relationships, understanding, and performance in academic institutions especially at the tertiary level. However, it is often fraught with challenges in developing countries in respect of insufficient supporting manpower and attendant high cost of running effective services. In institutions where the services exist, not all students benefit from it as a result of some factors such as: the sub-optimal performance of the advising personnel; negative psychological complex in students arising from unusual egocentrism (especially in those students who are regarded as “low performers” and would prefer not to be openly confronted); handicapped students especially those students with visible handicaps e.g. speech problems, etc. This paper is the first part of a study aimed at creating a balance in the foregoing situations by presenting a design of a faceless automated “ AdvisorBot ” based on the bot framework. The design reflects a virtual support system model which could be adopted to enhance student support and course advising efficiency. Analysis of the existing system in most tertiary institutions in Nigeria reveals that student support services actually exist though not efficient in the sense that there are seldom specialized units/departments dedicated to this function in majority of the Institutions especially the public institutions where student advising is the work of academic staff in the various departments. The design follows a mix of the agent and object-oriented approaches and produces an implementation-ready specification whose full implementation would effectively support students during their studies. The system facilitates the process of advising by providing quick and easy access to valuable information, and giving important feedback on several issues involved in student advisement, which otherwise would take considerable time.
学生咨询服务通常被认为是促进关系、理解和学术机构表现的主流工具,尤其是在高等教育阶段。然而,在发展中国家,由于支助人力不足和随之而来的经营有效服务的高昂费用,它往往充满挑战。在提供辅导服务的院校,并非所有学生都能从中受益,原因包括:辅导人员的表现欠佳;学生因不寻常的自我中心主义而产生的消极心理情结(特别是那些被视为“表现不佳”、不愿公开面对的学生);残疾学生,特别是有明显残疾的学生,例如言语障碍等。本文是一项研究的第一部分,旨在通过提出基于机器人框架的无脸自动“AdvisorBot”的设计,在上述情况下创造一个平衡。该设计反映了一个虚拟支持系统模型,可以提高学生支持和课程指导的效率。对尼日利亚大多数高等教育机构现有系统的分析表明,学生支持服务实际上是存在的,尽管在大多数机构中很少有专门的单位/部门致力于这一功能,特别是在公共机构中,学生咨询是各个部门的学术人员的工作。该设计遵循代理和面向对象方法的混合,并产生一个可实现的规范,其完整实现将有效地支持学生的学习。该系统方便快捷地获取有价值的信息,并对学生咨询中涉及的几个问题提供重要反馈,从而促进了咨询过程,否则将花费大量时间。
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引用次数: 16
Effect of Internal Branding on Employees’ Brand Supporting Behaviors: Empirical Evidence from the Higher Education Institutions of Ethiopia 内部品牌对员工品牌支持行为的影响:来自埃塞俄比亚高等教育机构的经验证据
Pub Date : 1900-01-01 DOI: 10.11648/j.ajomis.20210604.14
Hika Debela Biru
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引用次数: 1
Effectiveness of Systems Application on Financial Performance of Supermarkets in Kenya 肯尼亚超市财务绩效系统应用的有效性
Pub Date : 1900-01-01 DOI: 10.11648/j.ajomis.20210603.13
Collins Ochieng Obura
: The scramble for space in the retail industry has forced most supermarkets into adopting alternative strategies that will enable them attract customers, reduce operational costs and gain competitive edge in the market. This study discusses the application of systems with integrated database that are able to create enabling environment for efficient retail management. Bar coding and Continuous Replenishment System are the key variables used to get more insight into the study. The study adopted a cross-sectional survey design. A stratified sampling method was used to select a sample from the total population. From each stratum, the study used a random sampling to select 30% of the respondents which made a sample of 42 respondents. Data was collected using questionnaires and analysis done using statistical package for social science to communicate research findings. The ANOVA findings as explained by the P-Value of 0.000 which is less than 0.05 (significance level of 5%) confirms the existence of correlation between the independent and dependent variables. From the study findings, the study concludes that the introduction of barcode and continuous replenishment systems at an early stage of supermarket operation will enable the business to create greater responsiveness to its customers and suppliers, understand its cash flow needs, protect its financial data and confidential executive decisions and reduce its operation expenses leading to higher profitability and financial performance.
当前位置零售业对空间的争夺迫使大多数超市采取替代策略,以吸引顾客,降低运营成本,在市场上获得竞争优势。本研究探讨了集成数据库系统的应用,为有效的零售管理创造有利的环境。条形码和连续补货系统是用来获得更深入的研究的关键变量。本研究采用横断面调查设计。采用分层抽样的方法从总体中抽取样本。本研究采用随机抽样的方法,从每个阶层中抽取30%的被调查者,共42人。数据收集采用问卷调查和分析使用统计包社会科学沟通研究成果。方差分析结果的p值为0.000,小于0.05(显著性水平为5%),证实了自变量和因变量之间存在相关性。根据研究结果,该研究得出结论,在超市运营的早期阶段引入条形码和连续补货系统将使企业能够更好地响应客户和供应商,了解其现金流需求,保护其财务数据和机密的执行决策,并减少其运营费用,从而提高盈利能力和财务绩效。
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引用次数: 0
The Pricing of Meetings and Event Spaces in Hotel Revenue Management 酒店收益管理中会议和活动空间的定价
Pub Date : 1900-01-01 DOI: 10.11648/j.ajomis.20210604.13
Siddharth Mahajan
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引用次数: 0
Survey of Undergraduates Users Satisfaction with Library Services in Selected Academic Libraries in Ogun State 奥贡州高校图书馆大学生用户服务满意度调查
Pub Date : 1900-01-01 DOI: 10.11648/j.ajomis.20220701.11
Ogungbade Aderonke Ayobami
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引用次数: 0
Corporate Governance in Manufacturing and Management with Analysis of Governance Failures at Enron and Volkswagen Corporations 制造与管理中的公司治理——以安然公司和大众公司为例
Pub Date : 1900-01-01 DOI: 10.11648/J.AJOMIS.20190404.11
M. J. B. Kabeyi
Good corporate governance is important in management of all organizations. It gives direction to an organization in matters of accountability, integrity and quality of product and service offerings in the wake of stiff competition and conflicting stakeholder interests. Business challenges and realities create conditions that favor governance failure through unethical conduct hence the need for regulations in addition to self-governance. Business ethics in business and manufacturing helps organizations in making ethically critical decisions. Corruption is a significant indicator of governance failure and involves illegal activities, criminal activities that are both financial and non-financial abuses and benefits. Corporate governance should provide a framework upon which organizations are hence creates order and harmony between various stakeholders. Good corporate governance improves organization’s image as a self-policing institution that is responsible and honest. Whereas self-regulations looks more attractive for free market economies, legislation and control is necessary since not all managers believe and act within good corporate governance. The board of directors should set the strategic objectives and provide leadership for realization and supervise the management and report to shareholders on their leadership. The Enron Corporation and Volkswagen scandals demonstrated that severe consequences result from failed corporate governance in form monetary and non-monetary that affect both perpetrators and the innocent. Where corporate governance fails, major indicators include, manipulation of financial records, corruption, poor quality products and exaggerated quality specifications in manufacturing and engineering, high staff turnover, lack of transparency and accountability, poor stakeholder relationship, poor performance and low economic development leading widespread poverty and social disorder. External enforcement should be considerate to genuine stakeholder interests to avoid legislation that will encourage cheating for survival. Perpetrators of governance failure, should be punished both as individually and as organizations to set an example to others in the form of penalties that are reasonably high to discourage noncompliance.
良好的公司治理在所有组织的管理中都很重要。在激烈的竞争和利益相关者的利益冲突之后,它为组织在产品和服务的问责制、诚信和质量方面提供指导。业务挑战和现实创造了有利于通过不道德行为导致治理失败的条件,因此除了自我治理之外,还需要法规。商业和制造业中的商业道德帮助组织做出道德上的关键决策。腐败是治理失败的一个重要指标,涉及非法活动和犯罪活动,包括金融和非金融滥用和利益。公司治理应该提供一个框架,在这个框架上,组织可以在不同的利益相关者之间创造秩序和和谐。良好的公司管治改善了公司作为一个负责任和诚实的自我监管机构的形象。尽管自律对自由市场经济来说更有吸引力,但立法和控制是必要的,因为并非所有管理者都相信并在良好的公司治理范围内行事。董事会制定战略目标并领导其实现,并对管理层进行监督,并向股东报告其领导情况。安然公司和大众汽车公司的丑闻表明,公司治理失败的严重后果是货币和非货币形式的,对肇事者和无辜者都有影响。公司治理失灵的主要指标包括:操纵财务记录、腐败、制造和工程中的劣质产品和夸大质量规格、员工流失率高、缺乏透明度和问责制、利益相关者关系差、业绩不佳、经济发展水平低导致普遍贫困和社会混乱。外部执法应考虑到真正的利益相关者的利益,以避免立法鼓励为生存而作弊。治理失败的肇事者应该受到个人和组织的惩罚,以合理的高惩罚的形式为其他人树立榜样,以阻止不遵守。
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引用次数: 12
期刊
American Journal of Operations Management and Information Systems
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