A Study On Improving The Performance Of Construction Projects Using Lean Principles

Abstract

The present research was undertaken to study the improvement in the performance of 
construction projects using lean principles. The study was divided into three stages. Initially, a 
questionnaire survey was conducted on Visual Management techniques for improving the 
performance of construction projects. The questionnaire was distributed to civil engineers, 
architects, site managers, project managers, and full-time executives, with nearly 100 
questionnaires shared with the respondents. A total of 83 responses were received to determine 
the reliability of the data, and analysis was performed using SPSS software. In the second stage, 
the impact of value stream mapping on a real-time project is determined, and its performance 
in terms of time and cost reduction is evaluated. This case study examines a bunker-building 
project located in Kabul, Afghanistan, which was planned conventionally without considering 
lean concepts. To reduce the overall types of waste in the project, a plan was developed using 
Vico Control software to visualize the value stream of the project. Finally, the impact of value 
stream mapping on the project's total cash flow was evaluated and compared by plotting the 
total cash flow curve using the Vico software. As a result, labor costs were reduced by 33%. 
The duration of the project was reduced by 17%, reducing the duration of the project and 
improving the cash flow of the entire project by 14%, and increasing the cash flow from 
negative 67% to negative 44%.