V-Model, then it is necessary to first create the basis for the project realization in conformance with the V-Model.
Based on the following nine main activities, the present regulations for Reverse Engineering describe how this is to be done:
By using software techniques that can be combined under the term "software reengineering" such demands can be fulfilled, since this procedure influences characteristics of existing software which in turn has a positive effect on the software maintenance.
Software reengineering is a two-level process. It is comprised of
The essential tasks in reverse engineering are to understand the structure and behavior of the software part of existing IT systems, to process the software and to describe information on an abstract level about the software that is no longer available or lost.
Reverse Engineering should be realized as a preventive software maintenance measure when the software documentation is not complete or no longer in existence or available, when the software documentation is difficult to understand, when this documentation does not reflect the actual state of the software, or when it does not meet the required documentation standards (in this case: the product schemas of the V-Model).
The second level of the software reengineering process is referred to as "forward engineering". The forward engineering procedure corresponds to the customary procedures of the system generation (in this case: the procedure described in submodel SD).
It is the objective of forward engineering to modify the software part of existing IT systems until they are really state-of-the-art, which (contrary to reverse engineering) may also include functional software modifications. Typical examples for such modifications are the use of a different programming language, the introduction of a new database management system, or the transfer of software to a new hardware platform.
When forward engineering is realized in connection with prior reverse engineering, the products generated with reverse engineering remain the basis for the software modification with forward engineering. In general, it can be said that reverse engineering (described here) creates the basis (corresponding to the V-Model) for an efficient realization of SWMM measures.
Sub-models Quality Assurance (QA), Configuration Management (CM), and Project Management (PM) describe the accompanying activities within a development project, they are not subject to the regulations for reverse engineering and are applicable in the same way as submodel system development (SD).
In the following, the products in this category are no longer mentioned.
For the products in this category the following only explains which subproducts are omitted:
|This page online GDPA Online Last Updated 03.Mar.2004 by C. Freericks|