ERP effectiveness. When implementing a packaged Enterprise Resource Planning (ERP) system, many companies report that the module they first install is Financial Accounting. Among the measures used to gauge the effectiveness of their ERP system implementation is acceleration of the financial close process. Below is a sample of 8 companies that report their average time (in weeks) to financial close before and after the implementation of their ERP system. In Chapter 14, we saw these data:

Use a Wilcoxon signed-rank test to see whether the ERP system seems to be effective.

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Company Before After 1 6.5 4.2 234569 7.0 5.9 8.0 8.0 4.5 4.0 5.2 3.8 4.9 4.1 7 5.2 6.0 8 6.5 4.2