Root Cause Analysis Of Core Pin Quality Problem Using Cause And Effect Diagram

Enda Nur Malia , Ngah Deman (2009) Root Cause Analysis Of Core Pin Quality Problem Using Cause And Effect Diagram. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This report represents the study of Root Cause Analysis in Core Pin quality problem. Due to the purpose, the issue that was study is about quality in manufacturing process especially in a field of injection molding which contributes by the Core Pin . This aspect is very important to minimize a product cost without affecting its quality. The objective of this study is to identify the root cause of Core pin problem using a Root Cause Analysis technique. This study also requires preventing and improved the encountered problem identified in Core Pin quality problem for long term. This report focuses on the process to solve the cause that occurs as the quality problem for the Core Pin. The methods of Root Cause Analysis, Fishbone Diagram and 5Why analysis are used during the study. This method helps in data collection and data analysis before further conclusion is made as reflect of finding. A structure of Root Cause Analysis which consists of identifying and anal yzing the problems is expected to be developed at the end of the study. Data were collected from the manufacturing plant, which indicated that the monthly defect rate were significant ranging between 1.3 % to 5. 7%. These figure give a clear indication regarding to the number of defect occurs within the total production. This would be achieved if appropriate manufacturing practices were adopted with the aim of reducing the effect of manufacturing system variable that effect overall quality. A process attributes chart has been used to monitor the defect in each process of Core Pin. Upper and lower limit were given and the data are plotted in statistical control chart. If the defect above the upper limits the study meet the objective but if the defect below in the lower limits, some action must be taken to improve it.

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