Working with Custom BAPIs

• Custom BAPIs are Developed when there is no standard BAPI available to meet the customer requirement .
• The entire development process can be divided into four phases.

1. Analysis.
2. Design.
3. Implementation.
4. Test and Release.

Analysis

• The analysis phase involves determining which business process is to be implemented using BAPI. Scenarios are defined and then the steps that are to be visible externally ( to other components ) and implemented by business object Types and their BAPIs are identified.

Design

• For each BAPI involved in a scenario , the structure of the BAPIs interface is defined at a conceptual level. So that the BAPIs will be easy to use.

Implementation 

• The Implementation phase can be divided into three successive stages.

1. Defining the Data Dictionary structure ( including domains and data elements ) that the BAPI parameters are based on.
2. Implementing the program logic in Function Modules.
3. Defining the BAPI in the Business Object Repository ( BOR ) to ensure object-oriented access i.e Add the above Remote enabled Function Module as API Method of the Business Object.

Test and Release

• The documentation as well as functionally and usability of a BAPI are checked in the test phase.
• The BAPI can be Released once the test phase has been completed.