Probabilistic measures of redundant system with two types of repairmen, sensing device and analytical approach to find the optimium interchanging time

Sridharan, V.

doi:10.1108/02656710010353894

Cited by 7 publications

(4 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tuteja et al [3] studied Model B with exponential life, but arbitrary repair times. Sridharan [4] allows a random pre-inspection time for the regular repair person to determine whether he is able to repair a failed unit or not. If he is able he starts repair, if not he calls in the expert immediately.…”

Section: Introductionmentioning

confidence: 99%

A standby system with two types of repair persons

Bieth

Hong

Sarkar

2009

Appl Stoch Models Bus & Ind

View full text Add to dashboard Cite

A continuously monitored one-unit system, backed by an identical standby unit, is perfectly repaired by an in-house repair person, if achievable within a random or deterministic patience time (DPT), or else by a visiting expert, who repairs one or all failed units before leaving. We study four models in terms of the limiting availability and limiting profit per unit time, using semi-Markov processes, when all distributions are exponential. We show that a DPT is preferable to a random patience time, and we characterize conditions under which the expert should repair multiple failed units (rather than only one failed unit) during each visit. We also extend the method when life-and repair times are non-exponential.

show abstract

Section: Introductionmentioning

confidence: 99%

A standby system with two types of repair persons

Bieth

Hong

Sarkar

2009

Appl Stoch Models Bus & Ind

View full text Add to dashboard Cite

show abstract

“…While the authors announce permitting arbitrarily distributed life, repair, and patience times, it turns out that their deductions hold only when these times are exponentially distributed, as already mentioned in [2]. Later, Sridharan [18] provides the regular repairer a random pre-inspection time to check if he is capable of repairing a failed unit during that time. If capable, he begins to repair; if not, the expert repairer immediately comes and takes over.…”

Section: Literature Reviewmentioning

confidence: 99%

A System with Two Spare Units, Two Repair Facilities, and Two Types of Repairers

Andalib

Sarkar

2022

Mathematics

View full text Add to dashboard Cite

Assuming exponential lifetime and repair time distributions, we study the limiting availability A∞ as well as the per unit time-limiting profit ω of a one-unit system having two identical, cold standby spare units using semi-Markov processes. The failed unit is repaired either by an in-house repairer within an exponential patience time T or by an external expert who works faster but charges more. When there are two repair facilities, we allow the regular repairer to begin repair or to continue repair beyond T if the expert is busy. Two models arise accordingly as the expert repairs one or all failed units during each visit. We show that (1) adding a second spare to a one-unit system already backed by a spare raises A∞ as well as ω; (2) thereafter, adding a second repair facility improves both criteria further. Finally, we determine whether the expert must repair one or all failed units to maximize these criteria and fulfill the maintenance management objectives better than previously studied models.

show abstract

“…Although they claim to allow arbitrary life-, repair-and patience time distributions, their results are correct only under exponential life-and exponential repair times, as pointed out in [2]. Sridharan [15] allows a random pre-inspection time for the regular repairer to determine whether he is able to repair a failed unit or not. If he is capable of repairing, he starts the repair; otherwise, the expert is called immediately.…”

Section: Literature Reviewmentioning

confidence: 99%

A Repairable System Supported by Two Spare Units and Serviced by Two Types of Repairers

Andalib¹,

Sarkar²

2021

JSTA

View full text Add to dashboard Cite

We study a one-unit repairable system, supported by two identical spare units on cold standby, and serviced by two types of repairers. The model applies, for instance, to ANSI (American National Standard Institute) centrifugal pumps in a chemical plant, and hydraulic systems in aviation industry. The failed unit undergoes repair either by an in-house repairer within a random or deterministic patience time, or else by a visiting expert repairer. The expert repairs one or all failed units before leaving, and does so faster but at a higher cost rate than the regular repairer. Four models arise depending on the number of repairs done by the expert and the nature of the patience time. We compare these models based on the limiting availability A ∞ , and the limiting profit per unit time , using semi-Markov processes, when all distributions are exponential. As anticipated, to maximize A ∞ , the expert should repair all failed units. To maximize , a suitably chosen deterministic patience time is better than a random patience time. Furthermore, given all cost parameters, we determine the optimum number of repairs the expert should complete, and the optimum patience time given to the regular repairer in order to maximize .

show abstract

Probabilistic measures of redundant system with two types of repairmen, sensing device and analytical approach to find the optimium interchanging time

Cited by 7 publications

References 9 publications

A standby system with two types of repair persons

A standby system with two types of repair persons

A System with Two Spare Units, Two Repair Facilities, and Two Types of Repairers

A Repairable System Supported by Two Spare Units and Serviced by Two Types of Repairers

Contact Info

Product

Resources

About