D-Case Steps: New Steps for Writing Assurance Cases

摘要

This paper presents D-Case Steps, new steps for writing assurance cases. Although the concept of assurance cases is simple, writing assurance cases is difficult: stating the top goal, selecting strategies for decomposing goals and setting evidence, etc. are all difficult. For this problem, based on conventional writing steps such as the six steps method by Kelly [8], we incorporate stakeholder analysis step and consensus building step. This paper reports two assurance case workshops using D-Case steps, and evaluates the D-Case steps by the results of questionaries done by the participants.