Value-Adding Index - Share of Direct Work Included in Uninterrupted Presence Time

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

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Abstract

Continuous improvement depends on appropriate productivity measures. Productivity can be measured through time-motion studies but relies heavily on manual efforts and therefore contributes insufficiently to real-time awareness in dynamic environments such as construction. Indoor positioning shows potential determining shares of construction workers VA (Value-adding), based on Bluetooth Low Energy technology in real-time. Different studies show positive correlations between VA and productivity. However, it is unknown from location data how much workers engage in VA work while being present. Applying both methods simultaneously to one worker, this paper shows how to numerically quantify direct work (DW) and VA. Such combined data can show how much VA and DW occur when uninterrupted presence is detected while applying thresholds, indicating minimum durations spent inside work locations. Utilizing a small data sample enabled proof-of-concept testing and resulted in numerical quantifications of DW and VA. Preliminary findings show larger proportions of DW and VA when uninterrupted presence time is higher. Future research needs to enlarge the included data. If findings hold true, uninterrupted presence with higher thresholds could predict more accurate workers´ VA levels in real-time. The study also contributes to knowledge positively impacting construction by bridging workers’ behaviors on-site with monitoring technologies detecting movement
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
Pages130-141
Number of pages12
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

  • time-motion study
  • indoor-positioning
  • continuous improvement/kaizen
  • flow
  • lean construction

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