You monitor forecast accuracy:

• To find out whether you are using the right forecast models
• To identify what adjustments are needed to the forecast models
• To project expected deviation from the planned forecast

APO offers the following ways to monitor forecast accuracy:

• Statistical error analysis
• Univariate forecast error measurements
• Multiple linear regression model measures of fit
• Planned/actual comparison
• Viewing purpose-designed KPIs with a BW front end (BW is the SAP Business Information Warehouse)