Describe the development
From the upstream work package "business" definition can be seen which functions with R / 3 can not be covered or should. These functions are due to modifications or extensions implemented or covered by other software programs, with where the data interfaces need to be replaced to double-counting to avoid.
As part of the design phase of the scale of such development work is determine this order in the planning of the implementation phase can be absorbed. In parallel, to make a cost estimation and there are specific requirements for functionality documented.
Modifications
The SAP software is shipped with the source code. Thus it is possible that the program text, in exceptional circumstances changed by the customer may be in order to realize specific needs. This process is called a modification, and should be only in the absolutely unavoidable Cases are brought to use. Program modifications must be documented very carefully so that problems in later updates the standard should be avoided.
Also goes by the warranty claim against the manufacturer. An alternative to modifications is often through so-called "user exits" given. These are SAP-defined points in the source code, in which customized Special control routines may be added.
Extensions
If the standard range is not covered by R / 3, so that the ABAP / 4 Development Workbench, an "expansion" will be made that is, a company can develop the missing functionality themselves. This exploits the fact that SAP is not only a comprehensive provide business functionality, but also a complete and powerful development environment includes. Additional developments may thus using the same software components and create the same programming language as the original system. In this way, an integrated approach with a uniform system behavior can and create a standardized user interface, so that The user does not notice that it is an extension.
Interfaces
About the data interfaces between different software systems replaced. There is a distinction between two types of interfaces:
• Data provide they provide a unique data from the legacy system to replace in the R / 3. You will be after this procedure no longer required.
• Duration interfaces they allow the exchange of data with others, installed in the company Software programs. For example, if the payroll continues to be operated with software other than R / 3 will need their data regularly with the help of a permanent interface the R/3 is transferred.
SAP delivers with R / 3 has already been some interfaces such as:
• The PDC interface for coupling of time recording to the application component Personnel Administration and Settlement
• The MOB interface for transferring data from a mobile DAQ
• The Interface Adviser, in principle, all the interfaces to R / 3 and the R / 3 describes and standardizes in this work package the necessary interfaces and Extensions describes the programming guidelines drawn up and the fact costs estimated.
Legacy Data
With the creation of a concept for the old data is at an early stage to begin. Here are the specifics of a possible legacy adapted to the demands that are made from R / 3. sentence structure and available data from the legacy system are identified.
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