Abstract
There is an increase in the number of construction projects experiencing extensive delays leading to exceeding initial time and cost budget. This paper reviews 41 studies around the world which surveyed the delay factors and classified them into Groups. The main purpose of this paper is to review literature, each of which have categorized the causes that are responsible for time delays and cost overrun in projects. The collected list has 113 causes for delays categorized in to 18 different groups. Most of the researches have analysed the responses from the Questionnaire survey. The collected data are used to rank the problem. The data are further used to investigate and analyse Important Index, Frequency Index, Severity Index, Relative Important Index, Relative Importance Weight, Weighted Average, Mean, Standard Deviation and Variance. The collective comparison has revealed that the ranking given by all the researchers is not the same. Further each and every study has different rank ratings for the different group of the delays. This review paper attempts to provide an updated compilation of the earlier studies on ranking of the delay causers, which are never similar and constant for universal projects. It is concluded that a separate study is required for identifying the factors causing delay for projects operated in Sabah, East Malaysia.
Highlights
The purpose of this study is to critically review and identify the applicability of past studies on determining the factors causing time delays and cost overrun in current projects
The respective rankings results of the studies have been summarized to obtain an over view on the Groups that are highly responsible for the project delays
The review findings shows that the group and factor ranking differs based on the location like Hong Kong, Jordan, Vietnam, etc
Summary
The purpose of this study is to critically review and identify the applicability of past studies on determining the factors causing time delays and cost overrun in current projects. To the dislike of owners, contractors and consultants, many government projects experience extensive delays and thereby exceed the initial time and cost estimates (Odeh and Bataineh, 2002). This problem is more evident in the traditional type of contracts in which the contract is awarded to the lowest bidder.
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