This report examines and compares three alternative methods of vehicle replacement. These methods apply the economic criterion of minimising the long term cost of running a vehicle fleet. The first method is the group economic life method , which results in all vehicles in a particular group being replaced at the same age. It is easy to apply and is suitable when differences between vehicles in a group are small. The second is the individual economic life method, which results in each vehicle being replaced on an individual basis. This method is suitable when differences between vehicles are marked. The third method is based on the general economic life and can be regarded as a combination of the other two. It takes account of the fact that vehicles can normally be grouped, but that significant differences are likely within the group. It therefore needs special statistical techniques, but significant savings are possible. The theory of the methods, which is discussed in this report, is based on the assumption that vehicles will have the same workload throughout their life. (TRRL)

  • Availability:
  • Corporate Authors:

    Local Government Operational Research Unit

    201 King's Road
    Reading, Berkshire,   England 
  • Authors:
    • Phillips, G
    • Thursfield, P
  • Publication Date: 1980-6

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 38 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00345849
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0 900143 746
  • Report/Paper Numbers: T80 Monograph
  • Files: ITRD, TRIS
  • Created Date: Feb 27 1982 12:00AM