Using the Shewhart charting methods described in Figure 2.4 in Chapter 2, analyze the performance of the following invoice processing activity. The standard time to validate an invoice for payment is five minutes. Allowed variation by the company ’s management is three minutes more or less than this time (your control limits). Below are the times for Beth, a relatively new employee.

REQUIRED:

a. Complete a Shewhart control chart for this worker.

b. Would you say she is meeting company expectations? Why or why not?

Data from Figure 2.4 in Chapter 2

Transcribed Image Text:

Invoice # Time to Process 1 5minutes 2 Bminutes 3 D minutes 2minutes 5 8minutes 6. 6 minutes 20 minutes 8 D minutes