COMMERCE 2QA3 Study Guide - Quiz Guide: Process Capability, Control Chart, Viscosity

• School: McMaster University
• Department: Commerce
• Course: COMMERCE 2QA3
• Professor: Fouzia Baki

Document Summary

Short answer - quiz a: machine oil is used by clothing manufacturers to lubricate and protect sewing machines. A company that produces machine oil must ensure that the viscosity of its product meets customer requirements. Consequently, the viscosity of every batch of oil produced is measured. Calculate both the cp and cpk indices and interpret. Answer: control chart for individual observations (run chart, the centreline is = 101 cp. The control limits are 3 or 101 3(1. 5): lcl = 96. 5 cp and ucl = 105. 5 cp: cp = To find cpk you need to find minimum of cpl and cpu. Based on the process capability indices, the process cannot meet the upper specification limit. While the cp is 1, the process is off centre resulting in a cpk value less than 1. Lcl = 0. 2992 mg and ucl = 4. 1008 mg: centreline = 55 mg. Lcl = 54. 18 mg and ucl = 55. 82 mg.