...Adiel Teixeira de Almeida A repair contract problem has been analysed. Each contract alternative implies in a specific cost of the contract and a commitment of repair time. The decision maker has to choose the best alternative, taking into account the consequences modelled through an additive...

...Won Young Yun; Chung Hyeon Choi An optimization problem to obtain the optimal replacement interval is studied. The system is minimally repaired at failure and is replaced by a new one at age T. The model assumes that the time horizon associated with the number of replacements is random...

...H. Saranga; J. Knezevic Mathematical models for reliability prediction under multiple condition parameters are discussed. The models are developed under the assumption that the different condition parameters can be independent or dependent. Presents a model based on the continuous time Markov chain...

... to establish the key vibration signals that are necessary for risk estimation. Once the risk curve is identified using a proportional hazards model, cost data are then blended with risk to identify the optimal maintenance program. The structure of the decision making software EXAKT is also presented. Concludes...

...Terje Aven; Kjell Sandve Today most maintenance optimization models are established and interpreted within the classical statistical framework. There exist true failure time distributions and cost functions which we have to estimate. Using this approach, the results from the analysis are to a large...

... analysis for repairable system is not an easy task and usually a number of assumptions which are difficult to validate have to be made. Despite the fact that time series models have the advantage of few such assumptions and they have been successfully applied in areas such as chemical processes...

...P.A. Scarf; O. Bouamra A replacement model over two cycles, with decision variables based on age at replacement of the current fleet and size of the new fleet is considered. In order to consider both age at replacement and fleet size, the concept of penalty cost for unmet demand is introduced...

... detect errors by monitoring the behavior of μPs. This paper formulates three reliability models of μP systems with WDPs: model 1 considers the system where a main processor (MPu) has n WDPs with self checking. Next, model 2 considers the system with upper limit number of resets...

...Wei‐peng Liao; John Yuan Notes that the so‐called age replacement model was first proposed to determine the optimum age limit at which the system is replaced after installation. It was then extended by further assuming that the one‐unit system is supported by a buffer which stores only one spare...

...M. Ben‐Daya; Salih Duffuaa Models inspection co‐ordination of a group of machines using a non‐linear integer program. The objective of the model is to minimize the expected total cost per unit time, which is a function of a major inspection cost, minor inspection cost and the cost of failure...

... to interpret data on the state of equipment, and this interpretation is not always reliable. Aims to present a preventive maintenance policy based on inspections and a proportional hazards modelling approach with time‐dependent covariates to analyse failure‐time data statistically. Presents the structure...

... difficult to predict. Items within any system are very different from the point of view of reliability, cost, weight, volume, etc. Hence,the selection of spares for a planned mission must take into account all these features. Presents the generic mission success‐driven spares model developed for complex...