MRP Indicator 
MRP Indicator
Use
You can carry out the planning run in different ways. That way you can decide whether you want to automatically or manually trigger MRP for a material.
Features
With the MRP indicator in the material master you can specify whether or not you want to carry out a transaction-dependent MRP. If you set the MRP indicator to transaction-dependent MRP, the MRP will be automatically carried out in the background when executing and posting all existing transaction codes that trigger MRP-relevant changes. The transaction-dependent MRP can be a single-level or multi-level MRP.
In AFS Customizing you can activate or deactivate certain transactions for the transaction-dependent MRP. You can combine them in a transaction group. For example, you can name your transaction group sales and distribution. That means that you want to combine sales and distribution-relevant transaction codes within this transaction group that trigger MRP-relevant changes, such as the creation of a sales order.
If you set the MRP indicator to not transaction-dependent MRP, you can carry out the MRP for a material or for one or several plants. This can be manually triggered or carried out as background job.
There can be various reasons for combining transaction codes to transaction groups. On the one hand there can be application-dependent reasons. For example, you want to automatically trigger the MRP in the background when creating or changing a sales order, but not when creating or changing a purchase order. On the other hand there can be internal reasons in the company. For example, you plan basis components that are part of many finished products. You want to plan them in real-time and do not want to wait for the nightly or weekly total planning run.
On the initial screen of the single-item planning in the SAP standard you can enter