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:
Click Functions, Reserve.
Answer Yes to the system message about reserving specific serial/lot numbers.
In the Item Tracking List window, select e.g the lot from which to reserve items.
Click OK to open a Reservation window showing only supply with the specified item tracking number.
You can now reserve as described above.
Amending or Canceling Item Reservations
Reserving Items for Production Order Components
Viewing Item Availability in the Planning Worksheet