This purpose of this study was to identify the factors that have the largest effect on time overrun on commercial construction projects. An extensive review of the literature indicates factors that could possibly have an effect on delay in completion of a construction project include underestimation of project cost, lack of timely progress payment, poor working relationship between client and the contractor, changes to design during construction, incomplete project information, timeliness of project information, lack of communication between the client and the contractor, number of subcontractors, and inclement weather conditions. A web-based instrument was prepared to gather the data related to the effects those variables on time overrun in commercial projects. The instrument was sent to the CEO’s of 100 randomly selected construction companies. Thirty-one completed responses were received. The data was analyzed by administering stepwise regression technique using SAS. The results of the study indicate that the cost of a project, timeliness of progress payments made by the owner, and communication between the contractor and the owner have a statistically significant (p=<0.05) effect on time overrun in commercial construction.
1.1 BACKGROUND OF THE STUDY
Accurate construction planning is a key determinant in ensuring the delivery of a project on schedule and within budget. A contracting organization needs a sound time-planning and control system, which allows not only efficient and effective management of an individual project, but also meets the likely need to manage multiple projects simultaneously (Odeh and Battaineh, 2001; Majid and McCaffer, 1998). Various factors affect the construction time in buildings; Nkado (1991) has shown that prioritizing these factors is a useful basis for modeling and predicting construction time.
Construction time, although only a part of the lifecycle-duration of buildings, has become an increasingly important concern within the construction industry. The construction period demands the focus of attention of all the key participants in the construction process. It is during this period that the greatest part of the resources for a scheme is irreversibly committed.
Furthermore, construction time is a basis for evaluating the success of a project and the efficiency of the project organization. Indeed, completing projects on time is symbolic of an efficient construction industry (NEDO, 1988). In contrast, severe criticism of the industry arises when buildings take much longer than planned to erect (Bennett et al., 1979). It is extremely important to analyze the factors that significantly influence time overrun in commercial construction. The objective of this paper is to analyze the factors influencing time overrun in commercial construction projects.