The Use of Fault Tree Analysis to Visualize the Impact of Risk Factors on House Construction Duration

Abstract

Abstract

This research aimed to analyze the factors having an impact on house construction duration. The methodology was composed of studying the literature associated with the activities of house construction and factors causing the delay. Problems and delay causes in house construction were collected and combined with the brainstorming results. Fault Tree Analysis (FTA) was used to analyze the root causes of the delay problems. Weights, probabilities of occurrences, and consequences of delay causes were collected by using questionnaires and brainstorming. Fuzzy Analytical Hierarchy Process (AHP) was used to determine the weights of the delay causes. Factors affecting house construction duration were analyzed qualitatively and quantitatively by using FTA. This study focused on 8 activities of house construction; all the activities were ranked based on their impact on the delay factors including 1) architectural work, 2) construction, 3) water system and sanitary work, 4) cut and fill, 5) pile and foundation, 6) electrical work, 7) pre-construction, and 8) preparation. Top three causes of the delay were composed of contractor’s financial condition, payment delay from owners in construction work, and labour shortage. The proposed approach can help a project manager prioritize risky activities and risk factors having an impact on activity and the entire project. The suitable proactive risk measures can be developed to undertake the risks.

Keywords : Delay; Fault Tree Analysis; House Construction