Integration of Quality Function Deployment Method with Theory of Inventive Problem Solving in an Effort to Improve Clean Water Quality in Tirtanadi Regional Drinking Water Company Sunggal Medan Branch

Abstract

Clean water is the main natural resource that is very important in human life because almost some of our daily activities require water such as bathing, drinking, washing clothes, cooking, etc. The purpose of this study is to analyze integration of quality function deployment method with theory of inventive problem solving in an effort to improve clean water quality in Tirtanadi Regional Drinking Water Company Sunggal Medan Branch. This research was conducted by using descriptive correlational method. The population of this research is the active customers of Tirtanadi Regional Drinking Water Company Sunggal Medan Branch. The number of active customers of Tirtanadi Regional Drinking Water Company Sunggal Medan Branch is 502,503 the number of subscribers in 2021. Because the number of customers is so large, the researcher draws the number of respondents using simple random sampling and random sampling of respondents based on the arrival of customers. Analysis of the results of data processing using the house of quality (HoQ) and the TRIZ method. From the results of the study obtained the following results that average level of importance, sorted from the highest value are the dimensions of turbidity, odor, color, taste, iron and residual chlorine. While the value of each dimension is 4.54; 4.33; 4.3; 4.21; 4.12; 4.00. Performance level analysis The order of the average value of the perception level starting from the largest is the dimensions of turbidity, odor, taste, color, iron and residual chlorine with a value of 3.90; 3.67; 3.65; 3.64; 3.56; 3.1. The level of improvement is a comparison between the value expected by the company and the level of customer satisfaction with water quality. Sales Point consists of data processing, it can be seen that there are 9 attributes worth 1.5 which means that changes in these attributes have a major effect on the quality of clean water.