Projects duration plays a vital role as an important criterion in determining the success of building construction projects. Despite that, inaccurate evaluations of projects duration inhibit professionals to effectively control this variable resulting to serious issues as cost and time overruns and delay that need to found a lasting solution. The study objective was to assess the professional perspectives on the effectiveness of mitigating measures against inaccurate evaluation of projects duration in Nigeria. The study is based on descriptive and explorative design through the use of survey approach and literature search. 127-sample size determined based on the population of 190 construction professionals identified within the study area. Questionnaire used as an instrument in collecting data and 71 questionnaires retrieved which translate to response rate of 56% and the data analyse using descriptive and inferential statistics. Major findings shows the top effective mitigating measures as; Ensuring the project planner trained well in the construction process (MS=3.9437) and Preparation of the project program with input from the construction teams with vast experience (MS=3.9296) respectively. Moreover, Study conclude that, there is no significant variation among construction professionals’ perception and that the qualifications characteristics of respondents contributes significantly to the effectiveness of mitigating measures in practice.
Key Word: Cost, Project duration, Inaccurate evaluation, Inhibiting factors, Professionals