http://help.sap.com/saphelp_nw04/helpda ... ameset.htmPrerequisitesTo be able to use this function, the hierarchy must have flexible hierarchy structures. This is the case when the hierarchy is loaded via the PSA and, as a result, has transfer rules. Refer to Special Features when Loading using the PSA.
Using Sign Reversal http://help.sap.com/saphelp_nw04/helpda ... ameset.htmBEx Query Designer: Creating formula variables
You have loaded data into your InfoProvider. To be able to use sign reversal in Reporting, you need to define a formula variable in the query definition:
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1. You are in the Query Designer. Under Key Figures, use the context menu to choose New Formula. The Formula Builder opens.
2. Under Formula Variables, choose New Variable from the context menu. The variable wizard opens.
3. Give the variable a name and a short text. Choose Replacement Path as the processing type.
4. Choose your hierarchy basic characteristic.
5. Choose Hierarchy Attribute as the replacement. The attribute Sign Reversal is automatically displayed.
6. Save your formula variable. When defining the formula variable, you get the factor 1 or –1, with which you can multiply the required key figure.