The method for evaluating alternatives used in Figure 7-19 is called weighting and scoring. This method implies that the total utility of an alternative is the sum of the products of the weights and ratings of each criterion for the alternative. What assumptions are characteristic of this method for evaluating alternatives? That is, what conditions must be true for this to be a valid method of evaluating alternatives?

Figure 7.19.

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Criteria Requirements Real-time data entry Auto reorder Real-time data query Constraints Development costs Hardware costs Time to operation Ease of training Total Weight Alternative A Rating Score 18 18 14 50 20 15 10 5 50 100 5 90 3 54 1 14 158 5 תיןתיותיות 5 5 5 100 75 50 25 250 408 Alternative B Alternative C Rating Score Rating Score 5 5 3 4 4 4 3 90 90 42 222 80 60 40 15 195 417 5 תיותיות 5 5 3435 90 90 70 250 60 60 30 25 175 425