Identification of Waste Types and Their Root Causes in Green-Building Project Delivery Process

Abstract

AbstractTime-related and cost-related waste through design and construction phases of the Green Building (GB) project delivery process are much higher than that of Nongreen Buildings (NGBs). Although prior studies have identified some waste types and related root causes for GB projects, a comprehensive classification of process waste and root causes encountered in GB project delivery does not exist in the literature. The objectives of this study are (1) to identify and classify waste types and associated root causes observed in design and construction phases of GB project delivery process, and (2) to rank the classified waste types and root causes based on their effects on time and cost increases during design and construction phases. To achieve the first research objective, an extensive literature review and a case study with three GB projects were conducted, and the identified root causes and waste types were represented in an Ishikawa diagram. To achieve the second research objective, two rounds of the...