Reliability Analysis of CNG Dispensing Unit by Lambda-Tau Approach

  • Priyank SrivastavaEmail author
  • Dinesh Khanduja
  • G. Aditya Narayanan
  • Mohit Agarwal
  • Mridul Tulsian
Conference paper
Part of the Lecture Notes on Multidisciplinary Industrial Engineering book series (LNMUINEN)


CNG is considered a low maintenance cost and environment friendly fuel. Its use as an alternative fuel has surged in cities having CNG stations. Due to limited number of CNG stations, there is a substantial gap between demand and supply of CNG fuel. CNG dispensing unit is an important system of CNG station. Extended operation of dispensing unit is required for delineating this gap. For this, availability and reliability of CNG dispensing unit should be high. The present study reviews and exemplifies the fuzzy reliability analysis approach for behavioural analysis of CNG dispensing unit. The reliability block diagram and fuzzy Lambda-Tau approach have been used for evaluating reliability parameters. Fuzzy methodology has been used for representing failure rate and repair time. In present research work a comparative study of conventional fuzzy theory and vague theory has been expounded. The crisp reliability input and output data have been fuzzified using extension principle and alpha-cut approach. The fuzzy output has been defuzzified for assessing the system behaviour. The results of the study were communicated to system analyst and maintenance engineer.


CNG Reliability Fuzzy methodology Lambda-Tau approach Triangular fuzzy number Vague theory Alpha cut 

List of Abbreviations


Failure mode and effect analysis


Risk Priority Number


Fuzzy Risk Priority Number


Grey Relational Analysis


Fuzzy Inference System


Compressed Natural Gas


Particulate Matter


International Standards Organization


Indian Standard


National Aeronautics and Space Administration


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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Priyank Srivastava
    • 1
    • 2
    Email author
  • Dinesh Khanduja
    • 1
  • G. Aditya Narayanan
    • 2
  • Mohit Agarwal
    • 2
  • Mridul Tulsian
    • 2
  1. 1.Department of Mechanical EngineeringNational Institute of Technology KurukshetraKurukshetraIndia
  2. 2.Amity University NoidaNoidaIndia

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