how to restrict sales of item to specific customer

Question:
Say I have 30 customers and suppose i want to sell my product for 2 customers only
I don't want to sell for others.
how can i do it?

Answer:
1. Make one group of customers to whom I want to sell the particular item.
2. On price-list form Qualifier (tab) add that group for that item line with desired context, attribute, operator, and value

BOM

Q. Why limited organizations are available in Change Organization window??
Ans: We need to assign organization to the application to access it from that application and the responsibility. Navigation is Inventory (R) --> Setups --> Organization --> Organization Access


Q: What is the use/meaning of Lead Time% in Routing (Main tab), count point, CUM Yield?
Ans: 1. Lead Time % is the % of total lead time taken for that particular operation.
2. Count Point is generally used in Project manufacturing. I am not sure about how does itr affect the functionality.
3. CUM Yield (Cumulative Yield): It is the addition of yield of all the previous operations.

Q. What is supply type=Supplier in BOM?
Ans: It is used for VMI (Vendor Managed Inventory). This is a concept from Lean manufacturing where some vendor/s are asked to maintain their inventory at our place, so that our inventory carrying cost goes down.