This paper presents a maintenance policy for a system consisting of two units. Unit 1 is gradually deteriorating and is subject to soft failure. Unit 2 has a general lifetime distribution and is subject to hard failure. Condition of unit 1 of the system is monitored periodically and it is considered as failed when its deterioration level reaches or exceeds a critical level N . At the failure ti...

In this paper, a single-product, single-machine system under Markovian deterioration of machine condition and demand uncertainty is studied.  The objective is to find the optimal intervals for inspection and preventive maintenance activities in a condition-based maintenance planning with discrete monitoring framework. At first, a stochastic dynamic programming model whose state variable is the ...

Condition-Based Maintenance (CBM) optimization using Proportional Hazards Model (PHM) is a kind of maintenance optimization problem in which inspections of a system relevant to its failure rate depending on the age and value of covariates are performed in time intervals. The general approach for constructing a CBM based on PHM for a system is to minimize a long run average cost per unit of time...

As per ISO-10816, electric motors up to 15 kW are classified as Class I machines, and the major reason for their failure is that vibrations in them above alert limit. This study presents a new model predicting condition-based maintenance (CBM) initiation points through vibration measurement system of machines. The proposed follows accelerated life testing (ALT) procedure. ALT includes formation...

Maintenance is an essential part of long-term overall equipment effectiveness. Therefore, it to evaluate maintenance policies’ effectiveness in addition planning them. This study provides a classification technical systems for selecting indicators and models calculating these indicators. We classified the according signs, such as system maintainability, failure consequences, economic assessment...

Conventional maintenance strategies, such as corrective and preventive maintenance, are not adequate to fulfill the needs of expensive and high availability industrial systems. A new strategy based on forecasting of system degradation through a prognostic process is required. The recent advances in modelbased design technology have realized significant time savings in product development cycle....