Assessments of the Causes of Schedule Delay in Road Construction Projects; the case of Eshetu Lemma Road Contractor
No Thumbnail Available
Date
2018-06-06
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
Abstract
Generally delay (time overrun) is a condition the actual work does not complete in an estimated time period. Construction delay is a common problem in construction projects in Ethiopia and occurring in every type and phase of a construction projects. Therefore this study was carried out to identify the major causes of delay for road construction projects. Sixty one (61) project delay attributes were identified through detailed literature review and experts support. The study adopts quantitative methods with the help of primary and secondary data. Primary data was collected using self-administered questionnaires on 40 selected respondents from clients, consultants and contractor. Secondary data was collected through reviewing of related materials such as road construction project contract documents and project completion reports. This research categorized the causes of delay under four main groups of client related, consultant related, contractor related, and external related and then assessed their impacts on delay using relative importance index (RII) as a basis for analysis. The RII for all delay factors and group of categories was computed so as to rank the factors. The top five most influential causes of road construction project delays were identified as: (1) Deficiencies in planning and scheduling of projects with mean values equals to 4.492 or (RII=0.898), (2) Inflation and escalation of material prices with mean values of 4.308 or (RII=0.862), (3) Delay of financing and payments by owners (mean value=4.133) or (RII=0.827), (4) Difficulties in financing the project by contractor (mean value=4.075) or (RII=0.815), and (5) Insufficient estimation of original contract duration 3.992 or (RII=0.798). The study concluded that contractor related category is the most prominent delay factor with a relative importance index values of (RII = 0.639), followed by consultants related (RII = 0.632), then clients related (RII = 0.617) and external related delay causes exhibited the least aggregated relative importance index of (RII = 0.541).
Description
Keywords
Project Management, Relative Importance Index (RII), Road construction projects