Model of decision making on the continuation of the functioning of a technical object in conditions of partial refusal by the criterion of economic expediency
Abstract
Model of decision making on the continuation of the functioning of a technical object in conditions of partial refusal by the criterion of economic expediency
Incoming article date: 13.02.2019This article discusses the economic approach to the choice of the mode of continuation of the system in the face of partial failure. It discusses strategies related to the continuation of work in conditions of partial failure or cessation of operation until the completion of the operational restoration process. The characteristics of each of the strategies are presented in a comparative aspect for the continuation of the operation of the object in the post-failure period or the delay in operation for the duration of the restoration. The dependence of the time recovery parameters and the times defining the moment of identifying a partial failure in the coordinates of the time axis from the beginning of the working cycle to the next scheduled maintenance has been revealed. The resulting mathematical expressions allow, under certain conditions, to justify the choice of one of the two strategies considered. For more complex cases, it is proposed to use expert approaches to take into account additional characteristics of the process, such interregional period, performance and acceptable risks associated with working in conditions of partial failure. The article provides graphs illustrating the change in reliability characteristics in two ways of developments of events related to the adoption of a decision to continue work.
Keywords: partial failure, the coefficient of gain in terms of work, the probability of uptime, recovery time, time in the post failure period