Optimization of inspection intervals based on cost

2001 ◽  
Vol 38 (4) ◽  
pp. 872-881 ◽  
Author(s):  
F. G. Badía ◽  
M. D. Berrade ◽  
Clemente A. Campos
Keyword(s):  
Single Unit ◽  
Time Span ◽  
Time To Failure ◽  
Infinite Time ◽  
Unit System ◽  
Erroneous Result ◽  
Inspection Policy

We present a new inspection policy useful when testing is needed to detect failures of a single-unit system. It is supposed that tests may fail and give an erroneous result. The inspection policy minimizing cost per unit of time for an infinite time span is also discussed. In addition, we study the behaviour of the optimum policy for some time to failure distributions often assumed in reliability: exponential and Pareto.

Optimization of inspection intervals based on cost

2001 ◽  
Vol 38 (04) ◽  
pp. 872-881 ◽  
Author(s):  
F. G. Badía ◽  
M. D. Berrade ◽  
Clemente A. Campos
Keyword(s):  
Single Unit ◽  
Time Span ◽  
Time To Failure ◽  
Infinite Time ◽  
Unit System ◽  
Erroneous Result ◽  
Inspection Policy

We present a new inspection policy useful when testing is needed to detect failures of a single-unit system. It is supposed that tests may fail and give an erroneous result. The inspection policy minimizing cost per unit of time for an infinite time span is also discussed. In addition, we study the behaviour of the optimum policy for some time to failure distributions often assumed in reliability: exponential and Pareto.

A Three-Phase Inspection Policy Based on a Three-Stage Failure Process

2014 ◽  
Vol 488-489 ◽  
pp. 1272-1276
Author(s):  
Wen Bin Wang ◽  
Hui Ying Wang ◽  
Rui Peng
Keyword(s):  
Single Unit ◽  
Cost Model ◽  
Failure Process ◽  
Policy Model ◽  
Numerical Example ◽  
Unit System ◽  
Inspection Interval ◽  
Three Phase ◽  
Inspection Policy ◽  
The Cost

This paper proposes a three-phase inspection policy model based on a three-stage failure process for a single unit system. Different from existing works which usually assume unique inspection interval, the three-phase inspection policy allows the inspection policy to change according to the identified state of the unit. The possible renewal scenarios are considered based on which the cost model is proposed. Numerical example is presented, and the results clearly reveal the advantage of the three-phase inspection policy over the unique interval inspection.

scholarly journals Cost -Benefit Analysis of a Single-Unit System with Preventive Maintenance and Weibull Distribution for Failure and Repair Activities

2014 ◽  
Vol 10 (2) ◽  
pp. 5-19 ◽  
Author(s):  
Ashish Kumar ◽  
Monika Saini
Keyword(s):  
Preventive Maintenance ◽  
Single Unit ◽  
Failure Time ◽  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Single Server ◽  
Scale Parameters ◽  
Unit System ◽  
Complete Failure ◽  
Replacement Time

Abstract This paper deals with a reliability model developed for a single-unit system which goes for preventive maintenance after a pre-specific time ‘t’ up to which no failure occurs. There is a single server who takes some time to arrive at the system for doing repair activities. The unit does not work as new after repair at complete failure and so called the degraded unit. The degraded unit is replaced by new one after its failure with some replacement time. The failure time, preventive maintenance time, replacement time and repair time of the unit are taken as Weibull distributed with common shape parameter and different scale parameters. The switching devices are perfect. The system is observed at suitable regenerative epochs to obtain various measures of system effectiveness of interest to system designers and operation managers.

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