| The issue of project payment scheduling is to study how to arrange activities reasonably so that both parties of the project implementation could maximize their economic interests. The contractor's preference on the payment schedule is different from the client's, an available way is optimizing project payment scheduling by considering both parties'economic interests. Traditional investment payment scheduling only pursues static optimization in finance, which is an expected return before the implementation of the project. In fact, influences from other factors on scheduling are neglected, especially that of resource allocation. Since different types of scheduling lead to different distribution of resource demand, and cause different implementation costs, the practical interests of both parties will be influenced directly. Thus, it is clearly neither fair nor reasonable that only consider both parties'return financially when dealing with the issue of payment scheduling. In the thesis, the influences from financial returns of both parties and resource allocation on project payment scheduling are considered collaboratively to study how to arrange activities reasonably. Aiming at assumptions and defects of execution mode for activities and precedence relations between activities have, multiple execution modes for activities and generalized precedence relations with maximal and minimal time lags between activities are studied, the influence on project execution costs from imbalanced resource distribution and resource unconventionality allocation mode are analyzed, the associated multi-objective optimization model for project payment scheduling considering the two parties'economic interests and resource leveling is built. For the project payment scheduling problem is the typical NP hard problem, a heuristic algorithm of the SA with memory is studied to get approximate optimal solution for the examples of the above optimization model. |
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