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Błędy obliczeń w analizach systemów obsługi funkcjonujące na budowie

Więckowski A.

Przegląd Budowlany

2008

R. 79, nr 3

47-54

Wykonywanie robót budowlanych odbywa sie w ograniczonych okresach czasu trwania zmian roboczych. Badania przeprowadzono na przykładzie wykonywania wykopu koparką z odwozem gruntu samochodami jeżdzącymi w "obiegu zamkniętym". Wykorzystując opracowany, tzw. numeryczny model kolejkowy stwierdzono, że rozbieżności wyników przy pominięciu warunków rozpoczęcia oraz zakończenia zmian są bardzo znaczące.

Building works are performed within the limited periods of duration of working shifts. This research was carried out based on an example where a trench was made using a mechanical digger and the earth was taken away by vehicles travelling in a "closed cycle". Using a developed model, a so-called numerical queue model, it was found that the differences in the results when the shift commencement and ending conditions are neglected are very significant.

Identification of Ergonomic Issues That Affect Workers in Oilrigs in Desert Environments

Shikdar A. A.

International Journal of Occupational Safety and Ergonomics

2004

Vol. 10, No. 2

169--177

The main objective of this research was to conduct an assessment of ergonomic-related problems in oilrigs in a desert environment. A checklist, physical audit and medical records were used in the investigation. The results showed significant health, environment and work-related problems that could be attributed to ergonomic deficiencies in the work system of the oilrig. Some major ergonomic issues identified were hard physical work, back pain, discomfort, hot environment, long shift, and diverse schedule. Ninety-four percent of the employees perceived the workday as very long, 79% were dissatisfied with the work schedule, while 61% of the employees perceived the summer work environment as extremely hot. Ergonomics should be considered in the work system design so as to reduce or eliminate problems in oilrigs in hot desert environments.