| The success and failure of complex construction project not only determines the existence of all corporations but also has a great affection on the national economy. With the development of tendency that modern construction projects are becoming bigger and more complex, traditional management model can't meet and fit the demands of complex construction project management. A new and adjusted management model and idea is urgently needed. System reliability theory provides some new forms to study construction project management. It is an effective way to combine the system reliability theory and project management to study complex construction project management.This paper is based on system reliability theory, net planning technology, graph theory, draws on the experience of advanced management thought of other industries, deeply analyzes the scope of complex construction project and the aim of project management, and based on this, proposes the new definition of construction reliability, deeply studies the basic theory, method and appliance of construction reliability, builds the mensuration, evaluation and optimization theory and method system of construction reliability.The main innovated works of this paper are following:(1)Drawn the definition of reliability, combined the definition of successful project management, construction reliability is proposed and it is a totally new evaluation index of project management, its intonation is defined that is the accessibility of construction quality, credibility of time limit of work, economy and proportionality of the cost and safety of construction, which is reflected as the four aspects: reliability of time, cost, quality and safety.(2)Based on the system disintegration thought, the construction process of complex project is divided into several work unites, which can be the basic unites for the analyzing of system reliability, and this is the start point of this paper. The reliability relationships among working units are analyzed, the construction network reliability block diagram using work unites as its subsystem is built, which make the analysis of construction system reliability have the basic network chart model.(3)A whole mensuration method system of construction reliability is provided: i) The work units'time, cost, quality and safety reliability are proposed based on the theory of Probability and Mathematical Statistics, Monte Carlo Simulation Approach and Fault Tree Analysis, which can provide the basic date for the whole system construction reliability and lay the foundation of the construction network system reliability study.?) The BDD algorithm of network system reliability is improved based on disjoint minimal path set method and quick solving of whole system reliability is got through computer program and construction case is chosen for its appliance.?) Geometric mean of time, cost, quality and safety reliability for whole construction network is used to calculate the whole construction reliability instead of arithmetic average.(4)The qualified lower limit of construction reliability is made through grey target theory of gray system theory. Attached function model of reliability evaluation is built based on Fuzzy Mathematics theory and seven fuzzy evaluation intervals are got, which provides the basis of corresponding method and parameter for the evaluation of construction network system reliability.(5)The interrelation among the time, cost, quality and safety aim of construction project is quantitatively described, optimization research of complex construction project network system reliability is started, optimization model of construction project is built, the model is resolved through Non-Dominated Sorted Genetic Algorithm(NSGA-?)and is analyzed through real example.(6)In the end of the paper, a case is chosen as the application of such theory and method. |
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