RECENT DEVELOPMENTS IN SETTING COMPONENT AND VEHICLE REPLACEMENT TIMES

Statistical techniques are used to predict optimum replacement times. Failure statistics of water pumps are used as an example to obtain a Weibull lifetime distribution. Given these failure characteristics and the ratio of the cost of a failure to that of a preventative replacement, the best replacement time can be calculated using either well developed mathematical models, a graphical solution developed by Glasser or a standard computer package. There is often considerable uncertainty associated with data used to calculate vehicle economic life, but methods of checking the importance of various features are illustrated. The author suggests an alternative to the economic life approach which allows early disposal of a 'bad' vehicle and retention of a 'good' one. The method, annual maintenance cost limit, enables this decision to be made. A computer package is available to identify the maximum amount that can be economically justified in keeping a vehicle on the road for a further year. /TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00203122
• Corporate Authors:

  Embankment Press Limited

  Building 59, GEC Estate, East Lane
  Wembley, Middlesex HA9 7TQ,   England 

  Embankment Press Limited

  Building 59, GEC Estate, East Lane
  Wembley, Middlesex HA9 7TQ,   England 
• Authors:
  • JARDINE, AKS
• Publication Date: 1977-5

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 7-8
• Serial:
  • TRANSPORT ENGINEER
  • Publisher: Institute of Road Transport Engineeers
  • ISSN: 0020-3122

Subject/Index Terms

• TRT Terms: Charts; Costs; Digital computers; Durability; Equipment replacement; Failure; Forecasting; Inspection; Maintenance; Mathematical models; Motor vehicles; Repairing; Statistical analysis; Statistics; Time; Vehicle components; Vehicles
• Uncontrolled Terms: Replacement
• ITRD Terms: 1057: Air transport network; 6486: Chart; 224: Cost; 8673: Digital computer; 5910: Durability; 5520: Failure; 132: Forecast; 6473: Mathematical model; 3635: Repair; 6555: Statistics; 5414: Time; 1575: Vehicle inspection
• Subject Areas: Data and Information Technology; Finance; Highways; Maintenance and Preservation; Safety and Human Factors; Vehicles and Equipment; I95: Vehicle Inspection;

Filing Info

• Accession Number: 00163958
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: Dec 8 1977 12:00AM