Abstract
Micro-IT[1] business becomes more complex in those activities of developing and manufacturing. The author is responsible for managing development and manufacturing of embedded system as a PDT leader in IBM. Ambiguous handlings of people assignment, job descriptions, scopes or process make wrong effects for every project. Contracts, which need both offering and approving, are effective method to avoid the ambiguousness. This paper describes the importance of contract management, which is showing a tendency to be ambiguous, from case study of author's projects.