10. Activity Analysis for Direct-Work Rate Improvement in Construction (1 dez 2011 ano – 16 dez 2011 ano)

Descrição:

For project success, it is obviously important that workers are spending the majority of their time installing
materials that advance the project. This material installation time is known in the construction industry as “direct-work” or “tool time.”
Continuously improving the direct-work rate through the life of the project is critical to project success, and yet no workface assessment
method exists in the literature to provide (1) a detailed description of worker activities; or (2) a continuous productivity improvement process
to help management identify productivity inhibitors affecting site labor, develop a plan to reduce or eliminate these issues, and measure
improvements as a result of these changes. In response to this need, this research focused on the development of a workface assessment
method called activity analysis. Activity analysis is a continuous productivity performance improvement process, which efficiently measures
the time expenditure of workers on-site and identifies productivity inhibitors that management must reduce or eliminate to provide workers
with more time for direct-work activities. Six case studies were conducted to verify the feasibility of the activity analysis process. Further,
cyclical data from two major construction firms, including 26 project data points, were collected and analyzed to statistically validate the
hypothesis, which in the past was supported by limited numbers of case studies, that activity analysis can improve direct-work rates. The
research concluded that activity analysis, as a continuous performance improvement process, is feasible and when continually applied to a
construction site, can significantly improve direct-work rates through the life of a project.

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