Application of 7QC tools to analyze defect reduction at a remanufacturing company

Azmi, Ainur Natasha (2022) Application of 7QC tools to analyze defect reduction at a remanufacturing company. Project Report. Melaka, Malaysia, Universiti Teknikal Malaysia Melaka. (Submitted)

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Abstract

Quality has an important role in the business process across the entire organization. A lot of literature has been published on the effective application of 7QC tools concept in productivity, quality improvement and defect rejection. The 7Quality Control (QC) tools are simple statistical tools used for problem solving. However, In this work, a case study to resolve current situation in remanufacturing industry using 7QC tools was necessary apply into it. Most of the company doesn`t applied appropriate technique to solve the problem which gives an optimum result to the company. In this study, author an investigate of dimension out defect of connecting rod and data has been collected from inspection data. The application of 7QC tools which are flow chart, check sheet, pareto chart, cause, and effect diagram, scatter diagram and control chart with PDCA method (Plan, do, check, Action) have been developed and implemented in remanufacturing company. I investigate and analysis techniques used using the combination of 7QC tools with PDCA to resolve the problem of connecting rod defect. This cycle is used in different cases for continuous improvement or any change. It used also for quality problem solving, and this is what we will address in this research. PDCA cycle is an iterative four steps managing technique, The Plan phase consisted of investigating problem which using flowchart. The Do phase consisted of process analysis using check sheet, pareto diagram and cause and effect diagram. The result evaluation was verified in Scatter diagram and control chart in Check phase. The final phase act where decision making was made either the process can be remanufactured or rejected by Cpk value. From the method merged of 7QC tools with PDCA, it indicates a decision making where Cpk used as indicator either the process can proceed to remanufactured in the next process or rejected. Cpk value illustrate the process is capable where Cpk > 1, and vice versa. Hence, the outcome of this research, The significant QC tool has been studied and suggested in a remanufacturing process. The validation of QC tool has been establish and 6 tools of 7QC have been applied in the case study. The author offers significant tools with the PDCA concept and Cpk has been proposed as an indicator of decision making in the remanufacturing process and the process showing that the process was capable.

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