Project businesses and project-based strategic alliances have become an innovative business model to obtain synergistic competitiveness in the highly competitive market. However, in the practices of the alliances, conflicts and bargaining between team members are frequently occurred, while companies are seeking to maximize their own profits in the course of executing the cooperative project. Thus, to satisfy both parties, a bargaining decision support model is of great necessity for estimating the acceptable rewards of the cooperative parties which is crucial for enhancing the possibility of reaching a win win agreement in the bargaining. In this paper, we develop a sequential bargaining model to support strategic bargaining decisions. The model, based on Dynamics Game Theory, can estimate acceptable prices for participants in accordance with each party's costs and needs for the project's revenue. Since the partner's qualification and reputation constitute certain risks of the alliance, the alliance risk discount factors are additionally considered in the proposed model by incorporating fuzzy sets and utility-based assessment methods. The integrated model enables strategic-alliance companies to estimate their bargaining positions in different cases and select proper bargaining strategies in a systematic and rational manner, so as to maintain their right businesses.Project businesses and project-based organizations are increasingly emerging in modern marketplaces. With the increasing scale and complexity of projects, the business environment becomes more challenging and a single company can no more manage a complicated project alone. The project based alliance is especially popular in the construction industries.In recent decades, construction projects have become larger and more complex, and the application of alternative procurement systems such as design-build (DB) and build-operate-transfer (BOT) has been increased. A growing number of construction projects have exceeded the scope that can be handled by a single company. The desire for and search for collaborators to achieve synergistic competitiveness is the prime motive for companies to collaborate [1]. More and more companies take part in construction projects by means of joint ventures (JVs) [2].Through the manipulation of the appropriate resources, a JV may bring about different kinds of 978-1-61284-069-7/11/$26.00 benefits to participating companies, such as technology transfer, risk sharing, reduced cost, knowledge sharing, and resource complementarities [3][4][5][6][7]. JV has become an important strategy for construction companies in response to the increasing demands in the construction industry.While two profit-oriented companies intend to cooperate and form a strategic alliance for a particular project, it is relatively easy to divide the work scope based on each party's specialty, but, is always difficult to reach an agreement in terms of sharing risks and rewards. To form a JV team, companies have to select partner(s), assign each party's work sc...