Publications / 2018 Proceedings of the 35th ISARC, Berlin, Germany

Value Stream Mapping of the Design Process in a Design-Build Firm

Leidian Aragão Torres, Maria Cecília Souza, Ana Clara De Brito Xavier and Reymard Sávio Sampaio De Melo
Pages 532-539 (2018 Proceedings of the 35th ISARC, Berlin, Germany, ISBN 978-3-00-060855-1, ISSN 2413-5844)
Abstract:

With a scenario of intense difficulties faced by the construction industry, improvements of the productive processes are demanded in order to make them more efficient, optimizing resources such as human, materials and financial ones, aggregating quality to the delivered product. Thus, this study aims the application of a methodology of improvement in the design process, under the lean approach, in a design-build firm, including the usage of the tool Value Stream Mapping (VSM). The VSM is initiated from the first contact with the customer to the final design and construction documents delivery. As a result, high levels of interruption and waiting for information have been detected. It has been verified a total lead time of 50 days, with only 21.28% corresponding to the effective execution time of activities. The analysis of the negotiation phase indicates a consumption of 32% of the total cycle time and in the design phase it was observed that just 30.68% of the time is utilized on activities which generate value for the customer. Besides, there is a loss of €84.93 in materials and services. With the implantation of kaizens, it is proposed to lower the total lead time in half of the initial amount. Therefore, the simple usage of lean tools contributes to reduce waste.

Keywords: Lean Thinking, Lean Design, Value Stream Mapping, Design Management, Design Process, Architectural Executive Design, Private Sector.