Academic journal article Journal of the International Academy for Case Studies

Custom Circuitry International

Academic journal article Journal of the International Academy for Case Studies

Custom Circuitry International

Article excerpt

INSTRUCTORS' NOTES

The control chart for proportion defective does not provide any clear evidence (outliers, trends, cycles) of problems (NOTE: more rigorous tests for patterns could be conducted). Since other evidence (complaints, returns, rework, defect analysis) indicates severe quality problems, it is evident that a p-chart and/or its implementation (sampling, testing) is inadequate and insufficient. Consideration should be given to more comprehensive final-product testing (e.g., implementing a C-chart database). In addition, data is needed for monitoring board and component placement inspections. The production flow chart indicates that these inspections take place; no data were provided. …

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