Study On Of Evaluation And Selection Of The Project-contractor And Task Allocation

It is a hard and complex work to choose or evaluate the project contractors, involves many details of the qualifications. With the increasing complexity of social activities, the project's structure has become more complex, many evaluations have been carried out not by a single decision-making entity, we must rely on their collective wisdom to achieve. Due to the complexity of decision-making, uncertainty and ambiguity of human thinking, the use of preference information to determine the characterization of complex issues is often unrealistic, uncertainties in decision-making led to widespread concern academics. In this paper, through various forms of evaluation of the decision-making methodology to the project contractor to conduct an analysis of screening studies is proposed based on incomplete linguistic assessment information as well as the attitude of policy makers based on the evaluation of information cases, the evaluation of a single decision-makers decision-making research and study sequence of group decision-making based on preference assessment methods. After the contractor to filter candidates for a new round of contractor analysis of the characteristics, combined with the constraints of the project proposed, based on the characteristics of the tasks and the contractor model for multi-objective task allocation of project tasks to choose a contractor for task allocation.The main results are as follows:(1) the possible value range of the incomplete elements and the method of decision-making based on the incomplete linguistic judgment matrix are studied. Transform the incomplete linguistic preference judgment matrix into numerical preference judgment matrix according to given function, define the relatively consistency of the matrix; analyze the relatively consistency of the matrix, if not fit, amend the known elements until the relatively consistency of the matrix is fit, still, to solve the weights in a given error to gets them in the form of interval numbers, get the final rank with the aid of possibility degree.(2) In the decision-making process, the boundaries of the programs or decision-makers can be found according to the interval linguistic judgment matrix if there are extreme programs or decision-makers; a method of amending the known elements is given based on the consistency of the matrix. Moreover, the weights are also solved in the form of interval number and the programs are compared according to the possibility degree.(3) The aggregating method of preference rank is studied during the process of group decision-making. The consistent degrees of every decision maker's preference rank and group preference rank are calculated to modify the preference information whose consistent degree doesn't meet the requirement. Then the weight model is established based on the consistent degree. Moreover, the group decision-making aggregating model is set up based on preference rank. Finally, the model can be solved with PSO algorithm and the result of changes in the scope of allowable deviation can be also studied.(4) Based on multi-objective task allocation research. Through the project tasks as well as analysis of the characteristics of the contractor is given the task of multi-target allocation. Analysis of the characteristics of the contractor, combined with the constraints of the project proposed, based on the characteristics of the tasks and the contractor model for multi-objective task allocation of project tasks select the appropriate contractor assignments.