Methodology of Project Scheduling and Planning under Fuzzy Interpretations

传统的项目调度技术的一个基本局限性是不能处理施工工作中可能存在的不确定性和模糊性。没有考虑项目的时间和成本之间的权衡关系。在本研究中，研究了工期、优先关系、中断以及时间与成本之间不可分割的关系等新概念，以开发新的参数，帮助决策者了解建筑工程的绩效能力。对于每个标准，不确定性和模糊性与特定的估计相关联。由于所提出的模型都是多目标函数，为了方便模型的构建，我们尝试简单地提出一些函数之间的线性组合，并将其他函数作为约束，然后使用线性规划的单纯形方法进行求解。

A fundamental limitation of traditional project scheduling techniques is that they are not able to manipulate the uncertainty and fuzziness which may exist in construction work. And the relationship of trade-off between time and cost of the project are not considered.In this research, new concepts of durations, precedence relationships, interruptions and inseparable relationship between time and cost are investigated in order to develop new parameters which may help decision makers find out the ability of performance of construction work. For each criterion, uncertainty and fuzziness associated with a particular estimate.Since all proposed models are of multi-objective functions, an attempt is made to facilitate model structuring by simply suggesting a linear combination among some funtions and impose others as constraints, then the simplex method of linear programming is used to solve them.