Adapting the PSP to Incorporate Verified Design by Contract
Software Engineering Institute
The Personal Software Process promotes the use of careful procedures during all stages of development with the aim of increasing an individual's productivity and producing high-quality final products. Formal methods use the same methodological strategy as the PSP: emphasizing care in development procedures as opposed to relying on testing and debugging. They also establish the radical requirement of proving mathematically that the programs produced satisfy their specifications. Design by Contract is a technique for designing components of a software system by establishing their conditions of use and behavioral requirements in a formal language. When appropriate techniques and tools are incorporated to prove that the components satisfy the established requirements, the method is called Verified Design by Contract (VDbC). In this podcast, Bill Nichols discusses a proposal for integrating VDbC into PSP to reduce the number of defects present at the unit-testing phase, while preserving or improving productivity. The resulting adaptation of the PSP, called PSPVDC, incorporates new phases, modifies others, and adds new scripts and checklists to the infrastructure. Specifically, the phases of formal specification, formal specification review, formal specification compile, test case construct, pseudo code, pseudo code review, and proof are added.
About the Speaker
William "Bill" Nichols joined the SEI in 2006 as a senior member of the technical staff and served as a Personal Software Process (PSP) instructor and Team Software Process (TSP) coach. Before joining the SEI, Nichols led a software-development team at the Bettis Laboratory near Pittsburgh, where he had been …Read more
Suzanne Miller is a principal researcher at the Software Engineering Institute of Carnegie Mellon University in the Continuous Deployment of Capability Directorate. Miller actively supports multiple large DoD cyber-physical programs in their Agile/Lean adoption efforts, in addition to designing and teaching Agile courses and workshops tuned to government settings. Miller …Read more