In India, the construction industry is one of the largest industries after the agriculture industry. It produces a large quantity of waste and consumes more resources, which makes construction a troubling task. The application of new technology, the Lean Six Sigma concept is likely to be effective for improving the efficiency of the construction industry. It aims to eliminate all defects and also to minimize the wastage of materials, time, and effort in order to generate the maximum possible amount of value. The aim of this study is to evaluate, Lean six sigma as a process improvement method to improve the construction process by, understanding and analyzing the factors affecting the formation of construction wastes. It is not possible to implement a lean philosophy into a company, without understanding the basics and purpose for which they were introduced. The practical part of the study is devoted to a detailed analysis construction process using the well-known Six Sigma cycle DMAIC - an abbreviation of the words: Define - Measure - Analyze - Improve - Control. The analysis was carried out on the basis of net study and interviews with the construction management and employees of subcontracting companies present at the construction site. The set of 45 potential factors which contribute most to waste generation was identified. A questionnaire survey was developed and sent to architects, contractors, and project managers involved with on-site construction activities. It can be said that using quality management tools (Lean and Sig Sigma principles) it is possible to visibly improve building processes and it is likely to achieve waste minimization before and during construction works.