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Weighted concept scoring

Weighted concept scoring builds on the Pugh method by giving each criterion a weight by importance, and each concept a score on each criterion. The total score is the sum of weight times score, giving a more nuanced basis for choosing a concept than a simple net count.

S=∑iwi siS = \sum_i w_i\,s_iweighted total score

Symbols

wiw_iweight of criterion ii (sums to 1)
sis_iscore the concept gets on criterion ii

Example

Scores 3, 4, 5, 4 with weights 0.4, 0.3, 0.2, 0.1:

S=0.4⋅3+0.3⋅4+0.2⋅5+0.1⋅4=3.8S = 0.4\cdot3 + 0.3\cdot4 + 0.2\cdot5 + 0.1\cdot4 = 3.8.

The weights should reflect the customer's priorities, not the developer's own taste.
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Part of Product Development: Concept development and selection.