Modelling of Efficiency Evaluation of Traditional Project Delivery Methods and Integrated Project Delivery(IPD)

摘要

The classic triad”owner-architect-general contractor”are the main participants of traditional projects.They make contracts that regulate the rights and obligations of the parties and establish procedures for solving the entire range of issues during the operation of contractual relations.However,modem projects,especially large ones,require a wide range of participants.Taking into account the large number of project participants,it becomes very important to optimize the cooperation between them.The problems with communication leads to the division of the construction process to the stages,the significant number of changes and non-operating costs,and as a result to the increased project duration and increased costs.The research analyzes the core,characteristics and principles of the Integrated Project Delivery(IPD)and establishes the connection between it and the traditional project delivery methods.The IPD accumulates some of their special features and becomes the next stage in the evolution of the construction industry.One of the main characteristics of the Integrated Project Delivery is an early involvement of key participants,based on the following principles: early involvement,early goal definition,intensified planning,and organization and leadership.The aim of the research is to compare the effectiveness of the traditional project delivery methods and the Integrated Project Delivery by the criterion of the total cost for project modification.Methods of mathematical modeling were used to compare the effectiveness of the various project delivery methods.Thus,such curves and functions of dependence were modeled: between the increase in the cost of the project modifications and the period of their delivery;between the intensity of changes made to the project and the time when traditional project delivery methods are used;between the intensity of project modifications and the time on application of the Integrated Project Delivery.By means of the integral calculus(Simpson's rule)it was determined the total cost of the project modifications,which is a function of the method of project delivery and the cost of making the appropriate changes.The result of the calculations proves that the use of the integrated project delivery model reduces the total cost of making changes by 33%.