An Ameliorated Methodology for the Abstraction of Usecases from software requirements specification

Information systems of business process are realized through software projects which use the specific software requirements specification (SRS) provided for them as the base. The SRS contains details of the information system through which appropriate software can be developed. The information systems are also viewed prospectively with different equiponderant pragmatics like work, work process or usecase. The usecase is one of the prime perspective views each of whose sum forms the information system. In this paper, an attempt is made to abstract usecases statements of all actors from unformatted unstructured SRS text. The stages involve moulding the SRS, creating control flow & data flow graphs, creating appropriate slicing criteria, creating actor & actors´ interface attributes table, create slicing criteria for each usecase and then slice the relevant statements for each usecase. Here we have attempted to use Weiser modified algorithm [1] to abstract exact usecase from first cut usecase. The slicing criterion is obtained through the intersection of actor´s interface attributes and the referenced / defined attributes present between two consecutive actors (first cut usecase). Attempts have been made to resolve synonyms & heteronyms present in the SRS. The correctness & completeness of the proposed methodology depends on the realization of actor & actors´ interface attributes.