Wiest-Levy method
Contents |
[edit] Introduction
The Wiest-Levy method is a critical path method (CPM) based on the deterministic or exact duration of each task. CPM was developed by Morgan R Walker of the Engineering Services Division at Du Pont, and James E Kelley, who worked at Remington Rand. Walker and Kelly were interested in improving scheduling techniques used in the construction of industrial plants.
The Wiest-Levy method is a practical approach to problem solving that can be applied to ecision making. It sets out a way of deciding which jobs or activities involved in a complex project are higher priority (or critical) based on their overall impact. It also attempts to devise the ideal schedule for all jobs and resources required to meet time and budget targets.
[edit] History
Named after the American academics, Jerome D Wiest and Ferdinand K Levy, the Wiest-Levy method was introduced in the mid-1960s. A third collaborator, Gerald L Thompson was also involved in the development of this technique used to analyse, plan and schedule large, complex projects.
When applied to resource allocation and other aspects of project management in construction, this method helps to optimise the sequence of activities. Wiest created a concept called SPAR (Scheduling Program for Allocating Resources) which can be used for scheduling projects that have limited resources.
In the case of non-critical activities, the one that solves the problem with the least delay is chosen. If there are two activities with the same conditions, the one with the greatest leeway is delayed first, meaning that critical activities are only delayed when there is no other option.
For more information see: Critical path method.
[edit] Related articles on Designing Buildings Wiki
- Critical path method CPM.
- Progress of construction works.
- Resource leveling.
- Resource allocation in design and construction.
- Scheduling construction activities.
[edit] External resources
- F K Levy, G L Thompson and J D Wiest, Harvard Business Review, The ABCs of the Critical Path Method (September 1963).
Featured articles and news
Design and construction industry podcasts
Professional development, practice, the pandemic, platforms and podcasts. Have we missed anything?
C20 Society; Buildings at Risk List 2025
10 more buildings published with updates on the past decade of buildings featured.
Boiler Upgrade Scheme and certifications consultation
Summary of government consultation, closing 11 June 2025.
Deputy editor of AT, Tim Fraser, discusses the newly formed society with its current chair, Chris Halligan MCIAT.
Barratt Lo-E passivhaus standard homes planned enmasse
With an initial 728 Lo-E homes across two sites and many more planned for the future.
Government urged to uphold Warm Homes commitment
ECA and industry bodies write to Government concerning its 13.2 billion Warm Homes manifesto commitment.
From project managers to rising stars, sustainability pioneers and more.
Places of Worship in Britain and Ireland, 1929-1990. Book review.
The emancipation of women in art.
Call for independent National Grenfell oversight mechanism
MHCLG share findings of Building Safety Inquiry in letter to Secretary of State and Minister for Building Safety.
The Architectural Technology Awards
AT Awards now open for this the sixth decade of CIAT.
50th Golden anniversary ECA Edmundson awards
Deadline for submissions Friday 30 May 2025.
The benefits of precast, off-site foundation systems
Top ten benefits of this notable innovation.
Encouraging individuals to take action saving water at home, work, and in their communities.
Takes a community to support mental health and wellbeing
The why of becoming a Mental Health Instructor explained.
Mental health awareness week 13-18 May
The theme is communities, they can provide a sense of belonging, safety, support in hard times, and a sense purpose.
Mental health support on the rise but workers still struggling
CIOB Understanding Mental Health in the Built Environment 2025 shows.
Design and construction material libraries
Material, sample, product or detail libraries a key component of any architectural design practice.