In new economics such as high-tech, knowledge-driven industries, the competitive game changes frequently and dramatically. Two maxims are widely accepted in these markets: 1. it pays to hit the market first. 2. it pays to have superb technology. These industries face a high change and high speed competitive business environment. Information systems of these firms often have to be modified or created based on imprecise requirements or even conceptual ideals. According to past research literature, precise requirement is one of the key success factors for software development outsourcing. Imprecise requirements indicate uncertain project scope and tend to risk. This research of imprecise requirement software development outsourcing base on Adaptive Software Development and Incomplete Contract theory. A case study is used to analyze below imprecise requirement software outsoucing issues issues in a semiconductor foundry MES project: 1. How to deliver a usable system to achieve project goals from imprecise requirements? 2. How to manage frequent change ascribed to imprecise requirements? 3. How to manage project escalation and cost issue ascribed to imprecise requirement?