Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

Interdependent Transportation and Production Activity at the United States Postal Service

Richard D. Metters
The Journal of the Operational Research Society
Vol. 47, No. 1 (Jan., 1996), pp. 27-37
DOI: 10.2307/2584249
Stable URL: http://www.jstor.org/stable/2584249
Page Count: 11
  • Subscribe ($19.50)
  • Cite this Item
Interdependent Transportation and Production Activity at the United States Postal Service
Preview not available

Abstract

Transportation decisions and production decisions can usually be made separately. Under certain conditions, however, there are important interactions between transportation and production. An example of a combined production and routeing environment exists in the United States Postal Service (USPS). The daily movement and sorting of first class letter mail requires balancing transportation and mail sorting production costs, while considering the time dependent accumulation of mail during the day. The focus of this paper is on the practical application of a combined production/routeing model to a specific USPS division and the use of insights from this model to re-design the operation. A mixed integer linear program using candidate route integer variables is solved to near optimality. Specific routes and production schedules detailed by the model indicate that the division could save up to 5% of their combined production and routeing costs, amounting to $298000 per year. More importantly, the model provides insight on potential heuristics to choose routes under these circumstances.

Page Thumbnails

  • Thumbnail: Page 
[27]
    [27]
  • Thumbnail: Page 
28
    28
  • Thumbnail: Page 
29
    29
  • Thumbnail: Page 
30
    30
  • Thumbnail: Page 
31
    31
  • Thumbnail: Page 
32
    32
  • Thumbnail: Page 
33
    33
  • Thumbnail: Page 
34
    34
  • Thumbnail: Page 
35
    35
  • Thumbnail: Page 
36
    36
  • Thumbnail: Page 
37
    37