Grey Defects in Construction Project with Multiple Prime Contract: A Case Study of Bhumisiri Mangkhalanusorn Building King Chulalongkorn Memorial Hospital

Abstract

This research aims to study the characteristics of grey defect in construction project with multiple prime contract. The sampling are 868 cases of grey defect within a construction project with multiple prime contract. The data was collected by accumulating documents, participating as conference observer and inquiring project personnel. Data analysis was implemented by cross sectional analysis. As a result, there are 3 types of grey defect impairment namely disappearance, flaw and location error. Majority of grey defect impairment are defects of flaw, following by disappearance and location error. Flaw are mainly occurred at doors/windows, on the other hand, disappearance mainly occurred at equipment/furniture, over a half of them occurred at location where architectural systems overlay each other. Location error can be found in 3 positions; equipment/furniture, wall and ceiling. Therefore, planning of risk management in pre-construction phase is crucial to prevent the problem.