Triptych: TOPSIS

Goal-based multi-criteria decision making for your designs

Triptych licenses start at $329
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TOPSIS (Technique for Order Preference by Similarity to Ideal Solution) is a decision making technique that fits between the qualitative Pugh Matrix and quantitative SDI Matrix approaches. TOPSIS is a Goal-based approach for finding the alternative that is closest to the ideal solution  
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  • Create and manage a TOPIS matrix with up to 200 Criteria and 200 Options
  • Add, remove, or insert Criteria and Options with click of a button
  • Expand the TOPSIS Matrix with click of a button
  • Each criterion can be weighted
  • Check inputs for errors.
  • Integrated pareto chart
  • Manage information visibility
  • Context-sensitive help and right-click popup


The basic concept of this method is that the selected Design Options should have the shortest distance from the ideal solution and the farthest from the negative-ideal solution (in a geometric sense). The Euclidean distance approach is used to evaluate the relative closeness of each Design Option to the Ideal solution.

TOPSIS approach:
  1. Create matrix with Design Options and Criteria
  2. Assign Importance to Criteria
  3. Enter Design Option data for each Criteria
  4. Assign goal direction (Minimize or Maximize)
  5. Compute and Evaluate Scores

TOPSIS assumes that each Design Option wants to either be maximized or minimized, so the positive-ideal solution for a Criterion that wants to be maximized is the maximum value of all the design options considered and the negative-ideal solution is the minimum values of all the design options considered.


  • Microsoft Windows XP, Vista, or 7
  • Microsoft Excel XP (2002), 2003, 2007, or 2010 (32 or 64 bit)
  • Administrator rights required to install software


  • Sort Criteria and Options by any row or column
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  • Control how information is displayed.
  • Automatic calculation of scores
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This video shows design selection using Pugh Matrix, TOPIS, and SDI Matrix using SDI Tools v3 in action. We will be updating this video to reflect changes to SDI Tools v4 soon.