Heuristic SAP_PP_004 and shelf life planning

Hi

We want to use SAP_PP_004 heuristic to plan with different lot sizes by dividing PPDS horizon into multiple parts. There is no check box for shelf life planning in this heuristic. How we can modify this heuristic to consider shelf life planning.

Is there any sap note with sample coding for same?

Regards,

Santosh