Jim Is a Quality Control Manager at a Clothing Manufacturer

question 40

Essay

Jim is a quality control manager at a clothing manufacturer.He is studying a quality problem where zippers are purchased from an outside supplier and have been discovered to be poorly constructed.When the zipper is manufactured correctly, it should have a mean length of 15 inches and a range of .5 inches.Jamie proposes that 25 samples of five observations each should be collected on a daily basis.He plans to prepare control charts to monitor the progress of the supplier's quality performance on the zippers.
a.What are the upper and lower control limits and center line for an R chart?
b.What are the upper and lower control limits and center line for an X-bar chart?

---

Definitions:

Grocery Store

A retail establishment that primarily sells food, both fresh and packaged, along with various household goods.

Toronto Law Firm

A legal practice based in Toronto, Canada, offering various legal services and representation to its clients.

Economy Sector

An economy sector is a segment of the economy, categorized by the type of activity involved, such as agriculture, manufacturing, or services.

Involuntary Part-time Workers

Individuals who are working fewer hours than they desire or need, due to circumstances such as an inability to find full-time employment or cuts in work hours by their employer.