Document Type

Closed Project

Publication Date

Summer 2004


Timothy Anderson

Course Title

Productivity Analysis

Course Number

EMGT 537/637


Industrial productivity -- Mathematical models, Ink-jet printers -- Design and construction, Data envelopment analysis, Production management


There are many printers from different manufacturers being sold in the market, so how can we know which one is the best and choose the right printer for our own purposes. This reason was foremost in our group’s thoughts for developing a comparative inkjet printers’ performance study. We looked at four manufacturers; Canon, Hewlett-Packard (HP), Lexmark, and Epson, all currently offered in the U.S market. We then examined the results from fifty inkjet models having different features using Data Envelopment Analysis (DEA) models to compare their performance. Our experiments used input-oriented constant return to scale (CCR) running data considering:

  • ·four inputs
  1. printer price
  2. cost per page Black and White (B/W)
  3. cost per page color
  4. weight
  • four outputs
  1. printing speed B/W
  2. printing speed color
  3. resolution
  4. features

Initial test results were not impressive. Fifty percent of our DMUs were able to attain 1.0 efficiency. We then attempted the next step of our experiment by using a weight restriction model to run our data; the new results were markedly improved. We can then reasonable conclude that the weight restriction model is able to improve our results more feasibly.


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