IDENTIFICATION OF THE IMPACT OF MANAGEMENT KNOWLEDGE ON PROJECT DURATION THROUGH MULTIPLE DECISION-MAKING STEPS

The purpose of this study was to identify the management knowledge areas that significantly contribute to the delay of road construction projects and compare between countries. In this paper one of a probability sampling called simple random sampling technique was used to select sample from client, consultants, and contractors organizations directly involved in roads construction in Addis Ababa City. Four statistical tests: normality, reliability, spearman’s rank correlation, and Mann Whitney U test were conducted to identify and rank the roads delay factors accepted by all the stakeholders. Moreover, Road construction delay factors identified from previous studies conducted in Himachal Pradesh State and Ghana. A criterion to assign the identified delay factors into the ten management knowledge areas was defined and a modified equation called the relative aggregate importance index was developed to compute the impact of the management knowledge areas on project duration. As a result, the management knowledge areas namely: Integration, schedule, and stakeholders in the case of Addis Ababa City road projects, schedule and scope in the case of Himachal Pradesh State road projects, and integration, scope and quality management knowledge areas in the case of Ghana road projects have been identified as significant contributor to the extension road construction duration.