This setting is done in tcode: SPRO

The path is as follows;

Production - Shop Floor Control - Confirmation - Define time for confirmation processes.

Here we can determine whether we want to do the backflushing, goods receipt and cost calculations immediately on confirmation, as a background process or as an update.

Define Time for Confirmation Processes  - Define control keys that specify when confirmation processes run. You must specify the order category for the control key (10 PP production order, 20 network, 30 maintenance order, 40 process order).

You can specify the execution time for the following confirmation processes:
-  automatic goods receipt
-  backflushing
-  determination of actual costs

As execution times the following are available:
-  at once online
-  at once as an update
-  later in the background

The standard settings set is that there are no control profiles. That means that all confirmation processes run online.

Do the following if you want to improve performance in the area of confirmations.
1. Create a control key.
2. Assign the control key to the desired order type by entering it in the confirmation parameters for the order type in the field process control.
3. Make sure that the parallelization type is defined for the processes that you want to parallelize.
4. Plan the background job for confirmation processes (Program name: CORUPROC). You can create variants for the individual confirmation processes.

Tips by : Arvind Khinvesra

Read Also:
Control Regular Entry for Material Consumption

SAP PP Reference Books:
SAP Production Planning , Configuration, Interview Questions and Certification, Books

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