Evaluation and introduction of the structured methodology and a CASE tool

Two experiments conducted to investigate how useful the CASE method (software development based on the structured methodology and supported by upper CASE tools) is and how it can be successfully introduced into software development organizations are described. In the first experiment, sample programs are developed by both the CASE and conventional methods to compare reliability of the developed programs and analysis/design improvement due to learning effect. In the second experiment, the CASE method is introduced and applied to actual software development. Two major conclusions were reached through these experiments: the CASE method enables twice as much program reliability as the conventional method does, and the success or failure of introducing the CASE method largely depends on management factors, especially on developers' maturity.