The data was first reformatted using the application data structures. This became the input for preprocessor which was further divided into pre edit and edit processes. The pre edit brought reformatted data which existed in flat files to WINS mirrored database file structures known as hold files. Then pre edit performed high level policy validations. The edit process took the hold files as the input and posted them to the application master files after field level validations.
This solution helped the client to easily maintain its system as well as keep the room for further enhancements .