Decreasing Waste in Mechanical, Electrical and Plumbing Work

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Abstract

Eliminating wasted effort is an important part of lean philosophy. Waste has typically been measured with time sampling or time motion studies, where the share of direct work is estimated. However, few studies have taken the next step and investigated the root causes of wasted effort. This paper reports the results of an extensive time and motion study and focuses on qualitative evidence on the root causes of wasted effort. 15 MEP workers and foremen on four projects carried a helmet camera for one calendar week and quantitative time-motion analysis was done based on these videos. All participants were interviewed, and video footage was reviewed together with the participants to evaluate root causes of waste. The root causes of wasted effort were poor communication, issues with production planning and control, uncoordinated design, poorly organized material flow and a high share of preparatory work steps. The best direct work share was achieved in the only project which implemented takt production even though it was also the project with least repetitive work and largest distances due to large floor area. The biggest impact could be achieved with better constructability of design which would also enable just in time logistics and greater share of prefabrication. The results could be used to convince practitioners to adopt lean principles
Original languageEnglish
Title of host publicationProceedings 30th Annual Conference of the International Group for Lean Construction (IGLC). Edmonton, Canada, 27-29 Jul 2022
PublisherIGLC.net
Pages84-94
Number of pages11
DOIs
Publication statusPublished - 2022
MoE publication typeA4 Article in a conference publication
EventAnnual Conference of the International Group for Lean Construction - University of Alberta, Edmonton, Canada
Duration: 27 Jul 202229 Jul 2022
Conference number: 30

Publication series

NameAnnual Conference of the International Group for Lean Construction
ISSN (Electronic)2309-0979

Conference

ConferenceAnnual Conference of the International Group for Lean Construction
Country/TerritoryCanada
CityEdmonton
Period27/07/202229/07/2022

Keywords

  • lean construction
  • waste
  • workflow
  • time-motion study

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