Productivity improvement by using value stream mapping: Case study in construction of management, economics an‎d progress engineering department in Iran university of science an‎d technology

6/10/2026 12:00:00 AM

Construction industry consists of 13 percent of the gross domestic product of world, which is worth 10 billion dollars. This industry suffers from a lack of proper productivity. One of the methods for evolving productivity is lean/ Toyota production system, which calls for lean construction in the construction industry. The Main goals of lean philosophy are custumer needs an‎d waste declaration. Reducing waste leads to a decrease in non-value-added activities, which enhances productivity an‎d optimizes resource usage. There are various tools available for implementing lean construction; however, one particularly effective tool that can be utilized in construction an‎d process improvement, in addition to the design phase, is value stream mapping. Additionally, value stream mapping is an appropriate tool that illuminates light for the managers who are not familiar with lean construction an‎d eases its implementation. In this research, the construction of a composite ceiling of the management, economics an‎d progress engineering department of Iran university of Science an‎d Technology is surveyed. Time study an‎d asking resources allocated to jobs are used for providing information, data an‎d mapping the current state. subsequently the model was built using Arena simulation software an‎d then validated. After reaching validated model an‎d analyses, changes consisting of improving procurement, using new technology an‎d changing human resources are implemented for reaching the future state map. At last, lead time an‎d productivity improve 45.3 percent an‎d 51.6 percent, respectively. In addition to surveying the aforementioned changes, the methods of construction were altered, an‎d a study was conducted on the production line of modular building, utilizing value stream mapping for this process. Data gathering, creating a current state map, modeling, an‎d validation were carried out in a similar manner. Subsequently, changes were made regarding the rate of production, the distances between process stations, an‎d the allocation of resources. Additionally, production was leveled. As a result, a future state map was reached, which shows improvement in productivity an‎d lead time of 66 an‎d 42 percent, respectively

بهره وري , ساخت ناب , نگاشت جريان ارزش , مديريت تغيير

Productivity , Lean Construction , Value Stream Mapping , Change Management

Ali Farahi

Seyed Sajjad Mirvalad- Parviz Ghoddousi