A certain manufacturing plant is having problems meeting its delivery commitments. One of the problems has been
Question:
a. Is the process of purchase order error generation stable? What is your best estimate of the number of errors that will be on the next purchase order cut? Support your answers with control chart data.
b. The following data were collected for a 20-day period following the implementation of some improvements in the purchasing department. Using the control chart that you constructed for part a, demonstrate whether there is statistical evidence to validate the improvement
c. Construct a control chart for the process following the improvements. Is the process in control? What is your best estimate of the number of errors in the next purchase order cut?
d. Management wishes to reduce the sampling effort from 10 to 5 per day. What centerline and control limits should be placed on the control chart?
Step by Step Answer:
Quality Inspired Management The Key to Sustainability
ISBN: 978-0131197565
1st edition
Authors: Harold Aikens