Making Design Process Lean

Chien-Ho Ko1 & Neng-Fu Chung2

1Professor, Department of Civil Engineering, National Pingtung University of Science and Technology, 1, Shuefu Road, Neipu, Pingtung 91201, Taiwan, Phone +886 (8) 770-3202, ko@mail.npust.edu.tw; President, Lean Construction Institute-Taiwan; Research Director, Lean Construction Institute-Asia
2MS, Department of Civil Engineering, National Pingtung University of Science and Technology, 1, Shuefu Road, Neipu, Pingtung 91201, Taiwan, Phone +886 (8) 770-3202, M9733012@mail.npust.edu.tw

Abstract

Improper design in the construction industry leads to change orders, rework, decreased constructability, cost overruns, and delays, making it one of the biggest causes of waste. This study aims to develop a Lean Design Process to enhance design reliability by creating a learning environment using the design correctness ratio. Wastage is first identified by analyzing the planning and design processes. A new design workflow is then proposed using lean concepts to smooth design work, reduce unnecessary design errors, and increase design reliability. The proposed process can provide team members with feedback on design status, thus allowing for continuous improvement. The lean process is conceptualized using system dynamics to validate applicability. Analysis shows that the proposed lean design process can enhance design completeness and reliability, thus increasing design correctness. Waste due to improper design could be reduced accordingly.

Keywords

Lean design, design correctness, system dynamics.

Files

Reference

Ko, C. & Chung, N. 2014, 'Making Design Process Lean ' In:, Kalsaas, B.T., Koskela, L. & Saurin, T.A., 22nd Annual Conference of the International Group for Lean Construction. Oslo, Norway, 25-27 Jun 2014. pp 463-474

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