A Guidebook for Nighttime Construction: Impacts on Safety, Quality, and Productivity (2012) / Chapter Skim
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Pages 48-56
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From page 48... ...
48 The productivity of construction operations has many definitions that range from how effective and safe workers are on the job to exact metrics of how many units of a construction product are accomplished in a certain span of time. The definition that is most widely acceptable is the one that focuses on units produced over a defined time duration, or focuses, conversely, on the labor hours needed to produce a unit.
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From page 49... ...
Productivity 49 Factors Impacting Nighttime Productivity Factors that have a potential impact on nighttime productivity can be grouped into two main classes: human and work environment. Human factors deal with the impact that nighttime work has on construction laborers and supervisors, and work environment deals with issues such as nighttime traffic, availability of support services, and weather impacts.
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50 A Guidebook for Nighttime Construction: Impacts on Safety, Quality, and Productivity sleep deprivation results in dose-response relationships, with greater sleep deprivation leading to larger performance decrements, and that these effects are cumulative, so that the longer a subject is sleep-deprived, the greater the effect (Van Dongen et al.
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From page 51... ...
Productivity 51 available to create programs, such as the Fatigue Management Reference, developed by the U.S. DOT Human Factors Coordinating Committee (McCallum et al.
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From page 52... ...
52 A Guidebook for Nighttime Construction: Impacts on Safety, Quality, and Productivity • Physical activity to improve physiological alertness (Atkinson et al.
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From page 53... ...
Productivity 53 Productivity measurements on transportation construction projects usually rely on records of materials and equipment usage. Labor productivity is rarely measured and recorded.
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From page 54... ...
54 A Guidebook for Nighttime Construction: Impacts on Safety, Quality, and Productivity Productivity Improvement Studies have indicated consistently that these are the priority areas for construction productivity (Arditi 1985) : • Planning and scheduling.
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From page 55... ...
Productivity 55 produced on a specific activity (such as concrete paving) by individual laborers (such as concrete finishers)
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From page 56... ...
56 A Guidebook for Nighttime Construction: Impacts on Safety, Quality, and Productivity shift schedule, and task-specific demands of the work. These factors are controlled largely by the circadian process -- human physiological rhythms and cycles.
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