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Información tecnológica

versão On-line ISSN 0718-0764

Resumo

GASCA, Maira C; CAMARGO, Luis L  e  MEDINA, Byron. System to Assess the Reliability of Critical Equipment in the Industrial Sector. Inf. tecnol. [online]. 2017, vol.28, n.4, pp.111-124. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642017000400014.

A tool is proposed to evaluate the reliability of critical equipment, to provide criteria to improve decision making in maintenance. First, the tool hierarchizes the pieces of equipment through a criticality analysis, identifying the equipment in function of the following factors: i) its operation and production; ii) frequency, cost, repair time of the failures; and iii) the impact on the safety and health of the operator. A catalog of faults is built for each of the pieces of critical equipment, using the methodology of analysis of the mode and effect of the fault, creating a reliable record. With these data, the reliability of the equipment is analyzed and it is modeled using the Weibull, Normal and Log Normal distributions to determine the average time between faults. The tool was tested in a plastic processing industry, resulting in the identification of the extruder as the most critical equipment. In addition, a catalog of failures of various pieces of equipment was done, and calculation of the mean time between failures in automatic and dynamic form using the historical record of failures was done. This procedure offers indicators for decision-making, avoiding unplanned stops of the equipment.

Palavras-chave : maintenance; criticality; reliability; failure; Weibull.

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