There are various forms, menus which users can access in SAP to make data entry. Entry can be of master data or transactional data. For making a data entry in SAP R/3 the user needs to have authorization in SAP. Without proper access authorization in SAP, a user may not be able to enter data. The manner is which postings are done can also be controlled through this technique. At the time of data entry also, SAP performs several edit and validation checks over the data to ensure that it is complete and accurate. These edit and validation checks are available through configurable controls in SAP.
To explain SAP data entry techniques more simply, below, certain examples are given as to how the user data entry in SAP can be controlled.

1. User can be restricted from posting to a particular account.
2. Users can be restricted to post only to accounts belonging to a specific company code.
3. Users in SAPR3 can be confined to a business area but not to specific company codes.
4. A user can be confined to a cost center or a cost object also in SAP.

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