Define criteria before scoring
A criterion should describe a property that matters to the decision. “Quality” is too broad if one person interprets it as surface finish and another as reliability. Explain what the criterion means, which requirement it supports, and how it will be assessed.
Some conditions are minimum requirements rather than preferences. An option that cannot fit an essential constraint should not become acceptable merely because it scores well elsewhere. Separate those conditions from trade-offs that the client can reasonably weigh.
Compare evidence of comparable strength
One option may have measured information while another has a supplier estimate or a team assumption. A table that assigns the same kind of score to both can imply more certainty than the evidence supports. Include a note about the source and its relevance.
Use an explicit unknown where necessary. An unknown is not automatically a poor performance result, but it may create additional work before the option can be selected responsibly. The cost and practicality of obtaining that evidence can itself affect the next step.
Explain trade-offs in words
A total score can be a useful discussion aid, but it should not replace the reasoning. Weighting choices can make a preferred option appear inevitable. Explain which trade-offs drive the result and whether a plausible change in priorities would alter the ranking.
Retain a short written account of why the other approaches were not selected at this stage. An approach may be deferred because a dependency is unavailable, because it addresses a different operating condition, or because its uncertainty is too expensive to investigate now. Those are different reasons.
Make the conclusion revisitable
Record the chosen direction, the information available at the time, and the important assumptions. State what new evidence or changed requirement would justify reviewing the decision. This makes a future change of direction understandable rather than appearing arbitrary.
If the comparison does not distinguish the options, do not manufacture a decisive result. Identify the smallest useful activity that could separate them. The best immediate outcome of a comparison may be an experiment brief, a supplier question, or a clearer requirement rather than a final selection.