When you adjust a distribution, the system distributes the quantities actually delivered among the recipients. In Customizing for Merchandise Distribution, in the adjustment profile for each processing method you can enter function modules that control how the adjustment is made. A number of methods have been defined in the standard version of R/3. You can also enter function modules you define yourself with your own methods.

The function modules contained in the standard version of R/3 belong to function group WFR4. The following methods are available:

• Proportional distribution

• Proportional distribution with rounding off to unit of issue

• Distribution in accordance with the schedule line sequence

You can tailor the adjustment logic to your own requirements without having to change the R/3 source code by entering your own function modules in the relevant adjustment profile. The following options are available for this:

• You can enter your own function module for adjusting the distribution data when underdeliveries/overdeliveries exit. The interface of this module must be the same as that of module W_FRM_DISTR_PROPORTIONAL in the standard system.

• You can define your own function module that checks if a special situation exists that requires a special type of adjustment. The interface of this module must be the same as that of module W_FRM_DETERMINE_PREPACK in the standard system. If you enter a function module for this and the function module identifies a special situation, you can:

• have the function module return a second function module for use for the adjustment.

• use the function module defined in the adjustment profile concerned for use in special situations. The interface of this module must be the same as that of module W_FRM_DISTR_PROPORTIONAL in the standard system.