Research On Unbalanced Bidding Risk And Income In Engineering Bidding

With the standardization and maturity of public bidding and tendering system of construction market,both contract parties face great challenges and the competition in bidding and tendering process becomes more and more stinging,which make the benefit of construction enterprises falls continually.After the implementation of bill of quantities,most Bidding contracts employ unit price contract,whichcreating condition for implementation of unbalanced bidding.In order to win the bidding opportunity,the bidders often to seek a better bidding strategy,the unbalanced bidding is one of the most commonly used.But the unbalanced bidding is a double-edged sword,the bidders use this strategy can bring income opportunity for enterprise,but also face the risk of lower returns.Basing on the former scholars' research,this article proposes and establishes an unbalance bidding risk model based on fuzzy structural element,and present value model of unbalanced bidding based on fuzzy linear programming:(1)Establishing the unbalance bidding assessment risk model and the fuzzy nearness model based on structured element theory.From the bidders' perspective,analyze and determine the three major risk factors for unbalanced bidding;because the risk of unbalanced bidding has the fuzziness characteristic,the triangular fuzzy number and triangular fuzzy matrix are introduced in the construction of fuzzy judgment matrix,and use the structural element theory to simplify the blurring operation.Through the two models getting the consistent evaluation conclusion to evaluate the risk of unbalanced bidding,the bidders can take the corresponding measures according to the risk evaluation grading so that to provide guarantee for the high yields when the bidders in the engineering settlement.(2)Introducing the linear programming theory with fuzzy variables and increasing cost constraints to solve the problem of the unbalanced bidding present value maximization.Considering the influence of the time value of money and engineering quantity change factors on the unbalance bidding,combined with the potential engineering quality has the characteristics of fuzzy,establish the unbalance bidding present valuemodel based on fuzzy linear programming,and transform fuzzy linear programming model to the classical linear programming model by using structural element theory,which simplifies the solving process.At the same time,throughtheactual case and classical method of comparative analysis to obtain better results.According to the results of research,the method can make the bidder get high returns in the project settlement,but also make the bidding more tally with the actual situation.