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Background (cont)

For DEV thesis, you might conclude that previous systems ...
  • did not exist   (nobody has ever built a system to do this)
  • were too inefficient
  • had usability problems
For RES thesis, you might conclude that previous methods ...
  • did not work for a certain class of data
  • were inefficient for a certain class of data
  • were not elegant
Ultimately, you must show that your approach effectively addresses the problem.