V.Accounting Department Errors

The accounting department manager noticed that supplier invoice mistakes seemed to be related to the number of weeks that employees had been employed on that job. The data available in the worksheet below were gathered from the process. The mistakes included missing information, incorrect amounts, data entry errors, incorrect account numbers, etc.

Supplier Invoice Processing Errors versus weeks of Employment Weeks. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 On job % Invoice 15.8 16.3 19.4 18.8 12.0 13.2 15.9 15.3 11.0 7.6 2.6 3.0 3.8 4.1 4.0 4.3 4.0 3.9 4.2 4.9 Errors