Removing hidden waiting time in critical path schedules : a location-based approach to avoiding waste
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Authors
Kenley, Russell
Harfield, T.
Harfield, T.
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Date
2015-07
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Type
Conference Contribution - Paper in Published Proceedings
Ngā Upoko Tukutuku (Māori subject headings)
Keyword
construction project management (CPM)
location-based management (LBM)
cycle waiting time
waste
location-based management (LBM)
cycle waiting time
waste
ANZSRC Field of Research Code (2020)
Citation
Kenley, R. & Harfield, T. 2015, 'Removing Hidden Waiting Time in Critical Path Schedules: A Location-Based Approach to Avoiding Waste' In:, Seppänen, O., González, V.A. & Arroyo, P., 23rd Annual Conference of the International Group for Lean Construction. Perth, Australia, 29-31 Jul 2015. (pp 203-210)
Abstract
Production waste from non-productive activities is a well understood concept in Lean Construction Management.
Waiting-time is also a well understood form of production waste. However, waste arising from the hidden waiting-time inherent in poorly designed CPM schedules has not previously been described. Hidden waiting-time is defined and demonstrated using location-based visualisation methods for construction cycles. A construction cycle refers to a repetitive sequence of work required to erect a structure.
Two case studies illustrate how such waiting time can be removed and replaced by production buffers using appropriate levels of location breakdown. What sort of waste is represented by the time reduction demonstrated in these case studies? The TFV based taxonomy of wastes includes both inefficient waste and waiting time, but combining the two to define hidden waste found in CPM schedules,
requires a new category. Cycle waiting time is the waste of not planning the most efficient project structural cycle and therefore not being able to identify hidden wastes based on utilisation of location based structure
Publisher
International Group for Lean Construction (IGLC)
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International Group for Lean Construction (IGLC)
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© 2015 IGLC. All rights reserved.