Hi, Ashutosh, based on experiences with multiple customers and projects, a natural extension to SD would be learning GATP (Global Available to Promise) which is part of APO suite, and CRM (Customer Relationship Management).
Nonetheless, the future is in Hana and Friori, so you may pick up skills in FRIORI, and learn to build you own online Sales Application Apps on Hana Cloud Platform for FRIORI.
