<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.2d1 20170631//EN" "JATS-journalpublishing1.dtd">
<ArticleSet>
  <Article>
    <Journal>
      <PublisherName>ijesm</PublisherName>
      <JournalTitle>International Journal of Engineering, Science and</JournalTitle>
      <PISSN>I</PISSN>
      <EISSN>S</EISSN>
      <Volume-Issue>volume 15,issue 11</Volume-Issue>
      <PartNumber/>
      <IssueTopic>Multidisciplinary</IssueTopic>
      <IssueLanguage>English</IssueLanguage>
      <Season>Nov 2026</Season>
      <SpecialIssue>N</SpecialIssue>
      <SupplementaryIssue>N</SupplementaryIssue>
      <IssueOA>Y</IssueOA>
      <PubDate>
        <Year>2026</Year>
        <Month>11</Month>
        <Day>1</Day>
      </PubDate>
      <ArticleType>Engineering, Science and Mathematics</ArticleType>
      <ArticleTitle>Mathematical Modelling of System Parameters and Optimal Maintenance of ThreeUnits System with Intermittent and Non-Intermittent Repair Using RPGT</ArticleTitle>
      <SubTitle/>
      <ArticleLanguage>English</ArticleLanguage>
      <ArticleOA>Y</ArticleOA>
      <FirstPage>1</FirstPage>
      <LastPage>11</LastPage>
      <AuthorList>
        <Author>
          <FirstName>Dr. Navpreet</FirstName>
          <LastName>Kaur</LastName>
          <AuthorLanguage>English</AuthorLanguage>
          <Affiliation/>
          <CorrespondingAuthor>N</CorrespondingAuthor>
          <ORCID/>
        </Author>
      </AuthorList>
      <DOI/>
      <Abstract>This paper discusses mathematical modelling and optimal maintenanceof athree-unit system with intermittent and non- intermittent repair policies using RegenerativePoint Graphical Technique (RPGT). There are various repair policies, of this oneisintermittent repair is feasible, with perfect repair for two of the subsystems, other is nonintermittent repairable considered for the subsystem C which consists of three onlineparallel working components which may work in degraded state upon the failure of oneortwo subcomponents of subsystem C and after the complete failure is imperfectly repaired. All the units are served by the same single repairperson who is 24x7 hours available. Thesystem can operate in a reduced state when subsystem C partially fails. Various pathprobabilities, mean sojourn time and system behavior for increasing repair and failureratesof various units is discussed drawing tables, graphs, followed by analysis.</Abstract>
      <AbstractLanguage>English</AbstractLanguage>
      <Keywords>Intermittent and Non-intermittent Repair, Optimization, RPGT, Optimal Maintenance, Modeling</Keywords>
      <URLs>
        <Abstract>https://ijesm.co.in/ubijournal-v1copy/journals/abstract.php?article_id=16407&amp;title=Mathematical Modelling of System Parameters and Optimal Maintenance of ThreeUnits System with Intermittent and Non-Intermittent Repair Using RPGT</Abstract>
      </URLs>
      <References>
        <ReferencesarticleTitle>References</ReferencesarticleTitle>
        <ReferencesfirstPage>16</ReferencesfirstPage>
        <ReferenceslastPage>19</ReferenceslastPage>
        <References/>
      </References>
    </Journal>
  </Article>
</ArticleSet>