Consideration of operating environment when optimizing spare parts inventories

Projekt:

JVTC

Sammanfattning:
Spare parts estimation, consumption and management are greatly influenced by the reliability characteristics of system or components under consideration. Any maintenance policies and spare parts planning without considering the reliability characteristics are not optimum. Therefore it is important to study and analyse the reliability characteristics before making decision concerning spare parts planning. It is known that the operating environmental conditions in which the system is to be operated, such as temperature, humidity, dust, load, voltage stress, etc. often have considerable influence on its reliability characteristics. These factors, in fact affect the failure rate of a repairable system and non-repairable component, but are usually ignored in the reliability analysis. In general, new products are often used under conditions that are not anticipated. It is common to modify the predicted life length and reliability characteristics of product by considering the environmental and other factors. In this paper a general approach of integrating the system operating environment in dimensioning of spare parts planning is briefly studied. Two approaches, Poisson and renewal process are considered in the analyses of system/component failure behaviour. Eventually, two case studies that are used the mentioned methods are presented. The main purpose of the paper is to highlight the effect of system operating environment in system behaviour and consequently spare parts needs.

Författare: Behzad Ghodrati ; Uday Kumar
Utgivare: International Society of Science and Applied Technologies
Utgivningsdatum: 2009
Diarienummer: TRV 2011/58769
ISBN: 9780976348658
Antal sidor: 5
Språk: Engelska
Kontaktperson: Per Olof Larsson Kråik, UHjbs