shelf life planning - infinite scheduling

[Former Member]

Hi

When it comes to Shelf life planning(SAP_PP_SP001/SAP_PP_002), I read that the system always does infinite scheduling ( not considering work center capacity)

reference : Planning with Shelf Life Data in PP/DS - Production Planning and Detailed Scheduling (PP/DS) - SAP L...

"

If you execute the heuristic using an infinite detailed scheduling strategy, the procurement proposals do not violate any shelf life conditions, but may create resource overloads. You then use the PP/DS optimization, for example, to optimize the resource schedule while taking shelf life conditions into account.

¡ If you execute the heuristic using a finite detailed scheduling strategy, the procurement proposals may violate shelf life conditions. To remove the planning problems, plan interactively using push production or the detailed scheduling planning board (DS planning board)."

My question is:

What aspect of  shelf life planning is creating issues with finite planning? Why can't the shelf life conditions and finit

[Former Member · Accepted solution]

Hi

Its not only Shelf life Heuristics but normal planning heuristics also it is advisible to execute with infinite scheduleing But you can have multi step planning run where infinite scheduling planning run is followed by detailed scheduling heuristics or optimizer to achive production plan considering capacity constraints

Regards,

Santosh

[Former Member · Accepted solution]

Hi Santosh

Thanks for the reply. I am aware of the alternatives but in core, I am wondering why SAP designed the system this way...whether there is a reason for it?

[rupesh_brahmankar3 · Accepted solution]

Hello KA,

In finite strategies, the system switches to infinite scheduling in case the activity dates are kept. However, SAP in any case recommends infinite strategies becuse in finite scheduling folling are main problems

The utilization of resources is very poor

A very high number of violations occur in the delivery dates

The planning has very long run-times

You can use  Finite planning

It is useful if requirements are checked against stocks or if capacity problems seldom occur in production.

For details please refer consulting notes

459694 - Finite scheduling with CTP or SAP_MRP_002 (documentation)

551124 - APO: Finite scheduling with MRP heuristic (documentation)

563863 - Planning with shelf life as of APO 3.1

Best Regards,

R.Brahmankar