A study on how to improve the throughput time of Lean Six Sigma projects in a construction company

Purpose – The purpose of this paper is to study the use of the Lean Six Sigma (LSS) methodology in a construction company. Design/methodology/approach – In our study we analyze 62 LSS improvement projects carried out within a Dutch company. In our analysis we focus on both speed, in terms of throughput time (THT), and impact, in terms of project completion, of each project. Findings – From the analysis we conclude that the current THT of a project is about a year and we identify important factors that cause large project's THTs These factors are then translated into recommendations for an efficient execution of LSS improvement projects. Research limitations/implications – The analysis is based on a sample from one company of the Dutch construction industry. The scope should be broadened as more companies adopt quality and process improvement programs, such as LSS. Originality/value – The narrowed scope, only one company and focused mostly on the speed of projects, helped to do an in-depth analysis. Therefore, we are able to present concrete and useful recommendations that relate to practical issues in the execution of improvement projects. These recommendations offer a checklist for construction companies in the project selection process, in situations of starting or improving an LSS program