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The Model Plant can be used to determine the effects of imposing certain cost and schedule controls or contract types on a constructor. Effects of regulations or even a climate of possible regulation and design changes can be explored under different contract types or in diffe...
https://staging.construction-institute.org/ 6/6/2016 12:53:01 PM
The Model Plant provides sufficient data points that are representative of the Petrochemical industry.@The basic idea underlying the approach (that the estimate data reflect the actual labor productivity of the participant@s work force) appears to be valid based on experienc...
https://staging.construction-institute.org/ 6/6/2016 12:53:12 PM
Reconciliation of financial accounting systems and productivity measurement systems is not necessary to support productivity management. By first separating productivity measurement from the financial accounting system, and then limiting productivity measurement to those labor...
https://staging.construction-institute.org/ 6/6/2016 12:53:24 PM
Productivity is a frequently discussed topic in the construction industry because productivity improvement translates directly to labor cost savings. A growing consensus among owners and contractors indicates that measuring and monitoring productivity are essential first steps...
https://staging.construction-institute.org/ 6/6/2016 12:53:33 PM
Numerous systems for monitoring and measuring productivity are commercially available; as are many proprietary systems, yet a large number of today@s contractors do not apply these techniques. Key among the reasons for not doing so is an inability or unwillingness to grapple w...
https://staging.construction-institute.org/ 6/6/2016 12:53:51 PM
The analysis of productivity data reveals that, on average, labor efficiency is about 70 percent of normal when work is performed on changes; that is, there is a 30 percent loss of labor efficiency that results from the change. (SD-99, p.@v)
https://staging.construction-institute.org/ 6/6/2016 1:16:43 PM
Additional analyses support the conclusion that changes cause disruptions to the work which negatively affect labor efficiency.@The most significant types of disruptions are 1) lack of materials and information and 2) having to perform the work out-of-sequence. These disruptio...
https://staging.construction-institute.org/ 6/6/2016 1:16:55 PM
The principal factor leading to disruptions and loss of efficiency is timing of the change. If changes are identified before the work is given to the crafts, the effect of changes on labor productivity is probably minimal. However, if a change is identified by the crew in the ...
https://staging.construction-institute.org/ 6/6/2016 1:17:07 PM
A conceptual model was described that explained how changes and rework affected labor productivity. The model is based on disruptions. The model states that changes themselves do not cause losses of productivity, but instead cause disruptions to occur. It is these disruptions ...
https://staging.construction-institute.org/ 6/6/2016 1:17:19 PM
This model is based on the factors that affect labor productivity. The work environment and work to be done are factors that influence the workhours needed to produce the output. This is illustrated in the two figures below.@(SD-99, p. 23) {^widget|(widget_displayname)Waterma...
https://staging.construction-institute.org/ 6/6/2016 1:17:40 PM
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