The additive weighting model is a decision tool that aggregates information from different independent criteria to arrive at an overall score for each course of action being evaluated. The alternative with the highest score is preferred.
The general form of the model is

Consider Table P14-14 (p. 595) in view of these definitions and determine the value of each "?" shown.

Irt oj x where V the score of the jth alternative; w-the weight assigned to the ith decision attribute (1 ism ijthe rating assigned to the ith attribute, which reflects the performance of alternative j relative to maximum attainment of the attribute TABLE P14-14 Data for Problem 14-14 Alternative j Keep Purchase Existing a New Machine Machine Tool 1.0 1.8 i w Rank Decision Factor Tool 10 24 Flexibility in types of jobs scheduled 3 08 2 Ease of training and operation 40.7 Time savings per part produced Annual cost of ownership Rank Rank Rank Rank capital recovery cost) 0.7 1.0 0.5 2 0.7 2.69 1.0 2.30 V, (normalized) 1.00