Is subordinate to an operation and is used for more detailed planning of the process step that is described in the operation.
For example, you can use sub-operations to assign several people or machine that are required at the same time, to an operation. An sub-operation can be costed, but can only be scheduled relative to superior operation. You can cumulate standard values from sub-operations on the corresponding operation. You can determine whether sub-operations belonging to an operation are copied into the production order.
Depending on your requirements, a sub-operation can contain the following data:
Whether costs are determined for the sub-operation
Whether the sub-operation is processed internally or externally by a vendor.
Whether, afterwards in order processing, a confirmation can or must be made
Subordinate routing objects
You cannot assign material components, production resources/tools nor inspection characteristics to sub-operations, only to operations.