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Paper Abstract and Keywords
Presentation 2022-05-28 13:25
Equilibrium Maintenance Costs of Random Replacement between Age and Periodic Replacements
Satoshi Mizutani, Toshio Nakagaws (AIT) R2022-2
Abstract (in Japanese) (See Japanese page) 
(in English) We consider a random replacement policy in which a unit is replaced at random time. It is known that age and periodic replacement with time $T$ are better than random replacement when their preventive maintenance costs are the same. So, we consider some cases that maintenance costs are smaller than those of age and periodic replacement. That is, we obtain numerically maintenance cost of random replacement in which the expected cost rate of random replacement
become equal to those of age and periodic replacement. It can be assumed, in random replacement policy, a unit is replaced at time that some works has completed. We treat, two cases that a unit is replaced at completion time of: (i) one work, (ii) Nth (N=1,2,...) works. At first, we compare random replacement with age replacement policy. Next, we compare random replacement policy with periodic replacement policy which has minimal repair of the failures.
Numerical examples for the replacement policies are given when the failure distribution is Weibull distribution and the working time distribution is exponential.
Keyword (in Japanese) (See Japanese page) 
(in English) Random Replacement / Age Replacement / Periodic Replacement / Maintenance Cost / / / /  
Reference Info. IEICE Tech. Rep., vol. 122, no. 57, R2022-2, pp. 7-11, May 2022.
Paper # R2022-2 
Date of Issue 2022-05-21 (R) 
ISSN Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF R2022-2

Conference Information
Committee R  
Conference Date 2022-05-28 - 2022-05-28 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Software Reliability, Reliability General 
Paper Information
Registration To R 
Conference Code 2022-05-R 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Equilibrium Maintenance Costs of Random Replacement between Age and Periodic Replacements 
Sub Title (in English)  
Keyword(1) Random Replacement  
Keyword(2) Age Replacement  
Keyword(3) Periodic Replacement  
Keyword(4) Maintenance Cost  
1st Author's Name Satoshi Mizutani  
1st Author's Affiliation Aichi Institute of Technology (AIT)
2nd Author's Name Toshio Nakagaws  
2nd Author's Affiliation Aichi Institute of Technology (AIT)
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Speaker Author-1 
Date Time 2022-05-28 13:25:00 
Presentation Time 25 minutes 
Registration for R 
Paper # R2022-2 
Volume (vol) vol.122 
Number (no) no.57 
Page pp.7-11 
Date of Issue 2022-05-21 (R) 

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