Defects Reduction in High Rise Residential Building using Six Sigma: A Case Study

For multi-storeyed buildings, amount of defects during the construction works are most common. Thus it is important to determine the defects which lead to low quality in the construction projects, in case of architectural, structural and constructional standards. Therefore, a sequential approach is required to achieve good standards both in design and construction. Construction quality assessment system and six sigma quality management system are systems that could provide this approach. Six Sigma is a quality improvement technique based on statistics which can provide a broader quality concept, detailed performance measurement, coordinated and can avoid repeatable process thereby reduces variations. The objective of the present study is to evaluate the quality in a multi-storeyed buildings through six sigma. Also suggests various improvising methods for the quality of the building by minimising the defects. In this paper, DMAIC phase of six sigma is used for improving the quality of the buildings. Factors affecting the cause for defects is determined and then six sigma is used for data analysis. Thereafter sigma level quality of the building is calculated which helps to reduce the costs for variations, improve quality of the product, greater utilization of labor and facilities.