Abstract
In the project management of system development, risk management is really important. However, lack of requirements analysis in upper process often gives a crucial influence to the system development. Even if extraction of risks were completely carried out, insufficient countermeasures do not satisfy the quality that customers expect. Customers expect that systems and products satisfy the necessary conditions and guarantees not to fall into any dangerous situations. We show the description of countermeasures and procedures which clarify scope of assurance against risk, and which obtain an agreement on the assurance level with the customer. We propose a method using Assurance Case (ISO/IEC15026 part2) against requirement risk in the project management. Our original Assurance Case against requirements risk in the project management makes clear the scope to assure against risk, and the process to argue with a customer, and to get an agreement.
