DECISION-MAKING GUIDE
How to use a decision matrix to compare options
A decision matrix helps you compare several choices using the same factors. It makes your assumptions easier to see. The Webutiliti Decision Matrix Calculator is designed for everyday choices, such as comparing project tools, job offers, courses, suppliers, or feature ideas.
What is a decision matrix?
A decision matrix is a table of options and the criteria you care about. Criteria might include cost, ease of use, reliability, time, or support. You score every option against the same criteria, then review the results side by side.
A weighted decision matrix also assigns an importance weight to each criterion. A higher weight gives that criterion more influence on the total. The result shows how well each option fits the priorities and scores you entered; it does not prove that one choice is objectively best.
How the weighted score is calculated
This calculator uses a simple additive scoring method. For each criterion, multiply the criterion’s weight by an option’s score. Add all contributions to get the weighted total.
Formula: weighted total = sum of (criterion weight × option score).
| Criterion weight | Option score | Contribution |
|---|---|---|
| 5 | 4 | 20 points (5 × 4) |
| 2 | 4 | 8 points (2 × 4) |
The numbers above are arithmetic examples, not benchmark data. In the sample matrix loaded by default, Tool A scores 65 points, Tool B scores 67, and Tool C scores 60. These are illustrative sample ratings, not product reviews or a recommendation to buy a product.
How to build a useful decision matrix
- Name the decision. Write one clear question, such as “Which project management tool fits our team?”
- List realistic options. Compare choices that can actually meet your needs.
- Choose distinct criteria. Avoid counting the same idea twice, such as “easy to learn” and “simple onboarding.”
- Set weights and score consistently. Use the same meaning for 1 and 5 across all options.
- Review the ranking. Check the scores behind the winner and discuss close results before deciding.
Try scoring options before discussing them as a group. Differences between people’s ratings can show which facts need checking. You can rename or remove the sample factors, add options, and export the finished matrix as a CSV file.
What formal decision-analysis guidance says
The UK government’s The Green Book (2026), updated on 5 February 2026, describes appraisal as assessing the costs, benefits, and risks of different options. It distinguishes simple weighting and scoring from formal multi-criteria decision analysis (MCDA), which can involve expert facilitation and sensitivity analysis.
“simple ‘weighting and scoring’ that lacks an objective basis and can reduce transparency.”
This distinction matters. The Webutiliti calculator is a lightweight scorecard to structure everyday comparisons. It is not a full MCDA process, does not validate evidence, and cannot remove bias from the scores you choose.
For complex policy or public-sector appraisal, read the UK government’s supplementary guidance on using MCDA. The guidance describes how to define criteria, assess options, weight performance differences, and examine how sensitive a ranking is to the assumptions.
The European Commission’s Better Regulation Toolbox, Tool 62, also describes MCDA as a structured approach for comparing policy options across multiple impacts. These sources provide formal methods; the sample 1–5 scale in this calculator is a simpler, user-defined approach.
Decision matrix vs. Eisenhower matrix
| Method | What it compares | Use it when |
|---|---|---|
| Weighted decision matrix | Options scored against criteria such as cost, quality, or ease of use | You need to compare two or more alternatives |
| Eisenhower matrix | Tasks grouped by urgency and importance | You need to sort or prioritize a task list |
How to make the result more reliable
- Define what low and high scores mean before you begin.
- Give each criterion a weight that reflects your actual priorities.
- Use evidence for scores when it is available and record uncertain assumptions.
- Review whether important criteria are missing or duplicated.
- Treat a narrow lead as a prompt for discussion, not an automatic decision.
A weighted total reflects only the inputs provided. It cannot verify a supplier’s claims, account for an omitted risk, or replace suitable professional advice for decisions with major legal, safety, or financial consequences.