أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
a. Purchase Order Stage
b. Material Receipt Stage
c. Specification Stage
d. Payment Stage
Eventhough Purchase order stage and Specification stage both gives opportunity to add value, My answer is Specification Stage
C. Specification stage where you communicate your requirements to the supplier or potential suppliers.