Dear Bhavani,
Yes, SNP heuristic does not support shelf life planning.
Either, you can go for SNP optimizer or use PPDS heuristics.
I am also working on a concept for realizing the same issue and of course we are also only using SNP Heuristic. I have something in my mind but it would require technical change in the system. Will probably update here in 2-3 weeks after making sure that it works.Implemnting SNP optimizer/ CTM is far too much and too expensive when you only want to plan for expiring/ short-dated products for replenishment planning.
Best wishes,
Atul