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<br />Table 1 contains information adapted from a recent study and <br />illustrates the strategy. Components A-J are candidates for inclusion <br />within a system. Components A, C, and [ have already been implemented. <br />Stage 1 represents the 'first added' value of the candidate system com- <br />ponents. The incremental value (net benefits added) by component F is <br />the largest so it is selected for inclusion in the system. Stage 2 <br />represents the 'first added' value of the components with the base <br />system now comprised of components A, C, E, and F. Note that many <br />of the values Change because of system effects. Component J is <br />selected for addition to the system. The remainder of the table <br />contains the analysis through to completion. Note that 22 first <br />added analyses were made in the four stages required to select three <br />new projects out of seven alternatives. Exhaustive consideration of <br />all possibilities would have required 127 analyses whereas if all <br />components had proven to be valuable additions to the system, 28 <br />first added analyses would have been necessary. <br /> <br />, <br /> <br />. <br /> <br />22 <br />