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Flexible Planning: New Procedure for Automatic Forecast Model Selection ( RELN40C_LO_FLXPL_FORECST )

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Short text

Flexible Planning: New Procedure for Automatic Forecast Model Selection

Description

As of Release 4.5A you can choose between two procedures for automatic forecast model selection.

Procedure 1

The system carries out statistical tests and determines whether a trend or a seasonal pattern applies. In the trend test, the system subjects the historical data to a regression analysis and checks to see whether there is a significant trend pattern. In the seasonal test, the system clears the historical data of any possible trends and carries out an autocorrelation test.

Procedure 2

The system calculates the models to be tested using various combinations for alpha, beta, and gamma. The smoothing factors are also varied between 0.1 and 0.5 in intervals of 0.1. The system then chooses the model which displays the lowest mean absolute deviation (MAD). Procedure 2 is more precise than procedure 1, but takes much longer.

To use procedure 2, set forecast strategy 56 in the forecast profile.

Moreover, if you run the forecast online and set Automatic model selection in the Model Selection dialog box, a further dialog box appears in which you can set procedure 2 as one of your forecast parameters.

Software/hardware requirements

Installation information

Effects on System Administration

Effects on Customizing

Changes in procedure

Dependent functions

Planning

Further notes

Addresses (Business Address Services)   rdisp/max_wprun_time - Maximum work process run time  
This documentation is copyright by SAP AG.

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