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

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Journal Title
Journal ISSN
Volume Title
Conference article in proceedings
Date
2022
Major/Subject
Mcode
Degree programme
Language
en
Pages
12
130-141
Series
Proceedings 30th Annual Conference of the International Group for Lean Construction (IGLC). Edmonton, Canada, 27-29 Jul 2022, Annual Conference of the International Group for Lean Construction
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
Description
Keywords
time-motion study, indoor-positioning, continuous improvement/kaizen, flow, lean construction
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Citation
Görsch , C , Jianyu , Z & Seppänen , O 2022 , Value-Adding Index - Share of Direct Work Included in Uninterrupted Presence Time . in Proceedings 30th Annual Conference of the International Group for Lean Construction (IGLC). Edmonton, Canada, 27-29 Jul 2022 . Annual Conference of the International Group for Lean Construction , International Group for Lean Construction (IGLC) , pp. 130-141 , Annual Conference of the International Group for Lean Construction , Edmonton , Alberta , Canada , 27/07/2022 . https://doi.org/10.24928/2022/0115