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تعداد صفحات این فایل: ۸ صفحه

بخشی از مقاله انگلیسیعنوان انگلیسی:Project control based on a mutual application of pert and earned value management methods~~en~~

Abstract

The purpose of this work is to adapt probabilistic modeling methods to time control and cost control of the investment and construction projects. The paper considered the possibility of application of Program Evaluation and Review Technique (PERT) for the time control of construction project, and the Earned Value Management has been proposed as well as the control method for the project cost control. The study revealed that in the first step is to improve the Program Evaluation and Review Technique for the control and management of construction projects, and to expand Earned Value Management to the possibility of taking into account the probabilistic character of the cost.

۱ Introduction

Compliance with the target date of the construction and building of an object within a defined budget cost are determining factors that characterize the successful completion of the project [1,2].

There are two main reasons for the delay timing – slow implementation of works and the occurrence of unexpected events (failure mechanisms, failure of deliveries of materials and structures, extreme weather conditions, natural disasters, emergencies, accidents). In the first case, there are some trends in terms of the backlog that can track and predict. A second reason for the delay of the time is accidental.

If the work is completed more quickly than planned, its cost will rise, also if the work is performed very slowly, a slight increase in cost observed. Therefore it is necessary to take into consideration that the value of the work depends on the duration of its performance (Fig. 1).

۲ Main part

In case of failure terms is required to seek a compromise between the acceleration of the implementation of a job and saving the cost of additional resources in the construction process [1,2].

It is advisable to employ methods of probabilistic modeling to time control, because the slow implementation of the work can be described mathematically.

In modern construction practice, probabilistic modeling techniques used for project planning, but in practice it is useless, so it would be rational to consider the use of these methods for monitoring and control. It will be interesting to all participants of building production.

Objective: adapting probabilistic modeling techniques to time and cost control of the investment and construction projects. Tasks:

x show the possibility of using PERT method to control the timing of construction;

x offer cost control mechanism for the project.

Consider the example of the use of program evaluation and review technique (PERT) to control the timing of investment and construction project. PERT method – based on the consideration of three estimates the duration of each work: the optimistic, most likely, and pessimistic. These estimates are derived from a survey of experts. [3]

Gathering information about the actual duration of the project work is necessary to fix in a tabular form, or directly in the environment of project management software (Fig. 2).

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