Calculate& Decide

Decision tool

Compare Two Options

Compare two choices by giving each criterion a weight and scoring both options on the same 0–10 scale.

Updated

Judgment still matters: Decision tools organize your information. They do not replace personal judgment or qualified professional advice.

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What the score means

Compare two choices by giving each criterion a weight and scoring both options on the same 0–10 scale. A higher total means an option fits the weights and scores you entered more closely; it is not an absolute command.

Formula used

Option total = sum of (criterion weight × option score). Normalized score = total ÷ maximum possible points × 100.

Step-by-step calculation

  1. Name options and define distinct criteria where a higher score always means a better fit.
  2. Set each importance weight from 0 to 10.
  3. Score all options from 0 to 10 using the same evidence standard.
  4. Multiply each score by its weight, add the points, and normalize against the maximum possible total.
  5. Change uncertain values to see whether the leading option is stable.

Worked example

If quality is weighted 9 and Option B scores three points higher, quality adds 27 more weighted points to Option B. The final view shows whether other criteria offset that advantage.

Assumptions and limitations

  • Weights reflect relative importance on the same 0–10 scale.
  • Scores use consistent evidence and direction, where higher is better.
  • The output organizes stated preferences rather than discovering an objectively correct choice.

How to use this tool

  1. Define the decision in one sentence.
  2. Use criteria that matter to the decision and do not overlap.
  3. Set weights before looking at which option benefits.
  4. Calculate, then review the most influential criteria and test sensitivity.
  5. Record important facts or uncertainties outside the score.

Common mistakes

  • Giving every criterion the same name but measuring it differently between options.
  • Double-counting the same concern under several criteria.
  • Treating a narrow score lead as a command instead of testing sensitivity.

Frequently asked questions

What should a weight of zero mean?

The criterion is shown but does not affect the totals.

What if the scores tie?

The tool reports a tie under the entered weights and scores.

How do I test sensitivity?

Change an uncertain weight or score and see whether the leading option changes.

Methodology

Scores are calculated locally and text fields are rendered as text, not HTML. Read the decision-tool methodology and report an error.

Published and reviewed .