Abstract
Seven quality control (7QC) tools are used for reducing defects during manufacturing. These tools are highly effective in productivity and quality improvement. In this case, the study of the 7QC tools was applied in an automotive factory in order to reduce paint shop defects. Within four months the production line was inspected, defects were categorized and the 7QC tools were successfully applied, reducing the overall defect rate by 70%. Although every tool was important, the cause and effect diagram was responsible for finding the root causes of the defects.
Highlights
The Seven Quality Control (7QC) tools are highly useful for improving productivity, resolving problems in the quality operational process and delivery [1, 2]
Statistical Process Control (SPC) tools used to hold the position of 7QC tools
It has been reported that there are more than two SPC techniques, namely the Ishikawa diagram and the SPC control charts which were applied in automotive industry
Summary
The Seven Quality Control (7QC) tools are highly useful for improving productivity, resolving problems in the quality operational process and delivery [1, 2]. The 7QC tools are applied for improving the performance of the production processes, solving problems at any stage [3, 4]. If the process is under control limit the product is useful, while when the process is out of control the product has demerits resulting to rejection, rework or scrap [6] These problem solving tools are directly beneficial for customers too, as quality products entail the vast reduction of defects, while this process reduces cost. Statistical Process Control (SPC) tools used to hold the position of 7QC tools These tools have played an important role in the reduction of variations in many industries [8]. Many studies focused on these tools which were found very effective regarding problem solving in many industries. More complex quality tools were used, but they were not highly effective and they were not able to examine defects at a proper level [11]
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