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Identifying Critical Mass and Worker Density Constraints when Planning a Maintenance Outage: A Case Study

Presenter: Daniel Evoy
Reliability & Maintenance Advisor, Dlpemanagement
Description:
Continuous processing or manufacturing facilities will occasionally require planned outages to primarily address reliability or maintenance issues. Due to the high cost of these outages (opportunity and real), careful planning and scheduling practices are used to come up with detailed execution plans to reduce the planned duration as much as possible. While outage duration is typically determined using the critical path methodology, large quantities of smaller but similar in nature jobs can lead to unexpected schedule extension. A planning team recently applied this lesson-learned by calculating the schedule impact of such critical mass work. During inspections and maintenance outages, labor cost is usually a significant expense. In order to meet the required cost and duration goals, worker efficiency is critical. As part of the job plans and schedule creation, a planning team was able to model one crucial feature of labor efficiency – worker density, that is the maximum number of workers that can be allocated to a specific work area over a given time span with minimum productivity losses. As a result, small changes were made to the scheduling of individual tasks. This case study will illustrate how both constraints were considered when planning & scheduling a major maintenance outage.
About the Presenter:

Daniel Evoy solves your company's problems with expert knowledge, industry experience, and energy. Daniel began his career as a financial analyst at a major integrated oil and gas company in 1982, after graduating from McGill University with a degree in engineering, a post-graduate degree in management, and professional designations as an engineer and accountant. He progressed through various positions with increasing responsibilities in a variety of areas, including project/construction management and facilities maintenance, where he helped his employer achieve superior workplace safety and business results.
Daniel now works with businesses in the fields of facilities management, particularly equipment maintenance and reliability, project/construction management, and cost controls.
With more than 35 years of experience, Daniel has the ability to work with people at all levels of an organization and can assist in the implementation of any needed work process improvements. His knowledge and experience can be a huge help to your company and its objectives.
Daniel continues to volunteer in his community, serving as a director and board member of local non-profit organizations, among other things