Incremental Generation 
Use
This function reuses valid runtime objects that have already been created in the Mobile Application Repository (MAR). When you generate development objects for the first time, corresponding runtime objects are created and stored in the MAR.
Subsequently, if you or other users attempt to generate the same development objects without modifying the objects or corresponding generation settings (specific to Debug or Release profiles), the function reuses the existing runtime objects instead of regenerating development objects. This function ensures that only modified objects are generated, thereby requiring less time for generation.
When you build a mobile client application, you must generate all development objects of the application. Subsequently during customization, when you modify objects you need to generate only modified objects.
To improve performance in generation, you must specifically identify and generate objects that have been modified. If this is not possible, you can select and generate all objects of a specific category. However, if the incremental generation function is activated, only modified objects are generated even though you select unmodified objects along with modified objects for generation.
Activities
You need not perform any activities, as the system enforces incremental generation by default in the current release. However, you need to enable the incremental generation option manually, only if this option was disabled in an earlier release and you have upgraded from that earlier release to the current release.
To enable incremental generation, in the ARS_SYSTABLE, change the value of the INCRGENFRC parameter to YES.
See also: