In the program, you can reserve items for production orders. You have to distinguish between production order lines and production order components.
In the following, a firm planned production order is used.
Open the 
Firm Planned Prod.
Order window.
Select the firm planned production order you want to reserve items for.
Place the cursor in the relevant production order line.
Click Functions, Reserve to reserve items.
Select the Sales Line, Order line, and then click Functions, Reserve from Current Line.
The program has now reserved the quantity you entered in the firm planned production order line.
If item tracking lines exist for the sales order, the reservation system will take you through special steps.
Amending or Canceling Item Reservations
Reserving Items for Production Order Components
Viewing Item Availability in the Planning Worksheet