30th Annual Conference of the International Group for Lean Construction (IGLC) - Edmonton, Canada - 2022

https://doi.org/10.24928/2022/0115

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

Christopher Görsch1, Zhao Jianyu2 & Olli Seppänen3

1Doctoral Candidate, Department of Civil Engineering, Aalto University, Espoo, Finland, [email protected], https://orcid.org/0000-0001-9632-4031
2 Doctoral Candidate, Department of Civil Engineering, Aalto University, Espoo, Finland, [email protected], https://orcid.org/0000-0001-8519-6177
3Associate Professor, Department of Civil Engineering, Aalto University, Espoo, Finland, [email protected], http://orcid.org/0000-0002-2008-5924

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

Keywords

Time-motion study, indoor-positioning, continuous improvement/kaizen, flow, lean construction

Files


Full Text
 

Reference

Görsch, C. , Jianyu, Z. & Seppänen, O. 2022. Value-Adding Index - Share of Direct Work Included in Uninterrupted Presence Time, Proc. 30th Annual Conference of the International Group for Lean Construction (IGLC) , 130-141. doi.org/10.24928/2022/0115

Download: BibTeX | RIS Format

 

Founded in 1993, the IGLC is an international network of researchers from practice and academia in architecture, engineering, and construction (AEC) who feel that the practice, education, and research of the AEC industry have to be radically renewed in order to respond to the global challenges ahead.

2015 © All Rights Reserved.