case study $$Achieving Quality Excellence in Shipment Delivery$$

Case study questions:

How can a manager find out if the process involved in the premium express scheme is under two sigma control?

Explain in detail an approach the manager could take to identify the major causes for the delay in shipment. How she can determine the root causes?

What is meant by process capability? How can managers determine if the new processes met the target defect proportion? What are your thoughts on improving the process?

The manager realized the customer claims were increasing, so they raised the sample size by twenty units every four weeks. Based on this decision, analyze the process performance.

A sample was taken in week $21$ to ensure the process's performance, and it was below the lower control limit$.$ So$,$ what does the manager need to do$?$ How can capability be interpreted in this week?