Bright Peaklet

Decision matrix & priority ranking tools

Weigh up your options, one criterion at a time

List the options, decide what matters and how much, score each option from 0 to 10. The matrix adds it up, ranks the options and tells you how solid the answer is.

1Options, criteria and weights

OptionsCriteria →

Score 10 for the best possible, 0 for the worst, so a cheaper option gets the higher price score. Weights can be any numbers from 0 to 100; only their sizes relative to each other matter.

2Ranking

Laptop C comes out on top

  1. 1st Laptop C 104 74.3%
  2. 2nd Laptop B 97 69.3%
  3. 3rd Laptop A 95 67.9%

Weighted total = Σ weight × score. The percentage is the total out of the best possible 140 (every score 10).

How sensitive is this?

Raising the weight of Price from 5 to 6.75 would tie Laptop C with Laptop B; go past that and Laptop B wins. That is a sizeable change, so the lead looks fairly safe.

Each criterion's share of the weight

  • Price
  • Battery life
  • Weight
  • Screen

Your matrix is saved in this browser only.

How a weighted decision matrix works

Put the options down the side and the things that matter across the top. Give each criterion a weight for how much it counts, then score every option on every criterion. An option's total is the sum of weight × score, so a strong score on a heavy criterion counts for more than one on a light criterion.

Total = Σ weight × score; share of maximum = total ÷ (Σ weights × 10)

In the laptop example, Laptop C scores 5, 9, 9 and 8 on price, battery, weight and screen, weighted 5, 4, 3 and 2: 25 + 36 + 27 + 16 = 104 out of a possible 140, or 74%. Laptop B wins on price but loses elsewhere and finishes on 97.

The sensitivity check asks what people forget to ask: how far would one weight have to move to change the answer? If a small change would do it, the options are close, and the decision may hang on something you haven't scored yet.

Sources

More ways to decide

Four more tools for priorities, trade-offs and money over time.

Questions

How should I choose the weights?

Rank the criteria first, then give the most important the biggest number. A must-have, such as a budget limit, is not a weight: drop the options that fail it before scoring.

Does 10 always mean best?

Yes. For price, the cheapest option gets the highest score. Scoring some criteria the other way round is the most common mistake with a decision matrix.

Where is my matrix kept?

Only in this browser's local storage. Nothing is uploaded; Clear empties it, and the CSV download gives you a copy to keep.