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    Removing hidden waiting time in critical path schedules : a location-based approach to avoiding waste

    Kenley, Russell; Harfield, T.

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    Kenley and Harfield 2015 - Removing Hidden Waiting Time in Critical Path Schedules_ A Location-Based Approach to Avoiding Waste.pdf (1.078Mb)
    Date
    2015-07
    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)
    Permanent link to Research Bank record:
    https://hdl.handle.net/10652/3402
    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
    Keywords:
    construction project management (CPM), location-based management (LBM), cycle waiting time, waste
    ANZSRC Field of Research:
    120201 Building Construction Management and Project Planning, 120506 Transport Planning
    Copyright Holder:
    International Group for Lean Construction (IGLC)
    Copyright Notice:
    © 2015 IGLC. All rights reserved.
    Available Online at:
    http://iglc.net/Papers/Details/1220
    Rights:
    This digital work is protected by copyright. It may be consulted by you, provided you comply with the provisions of the Act and the following conditions of use: Any use you make of these documents or images must be for research or private study purposes only, and you may not make them available to any other person. You will recognise the author's and publishers rights and give due acknowledgement where appropriate.
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    • Construction + Engineering Conference Papers [198]

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