Question 19.8: Rating a Computer’s Cost Susan is choosing a computer, and s...
Rating a Computer’s Cost
Susan is choosing a computer, and she has narrowed the possibilities to five choices. She will be considering cost, a variety of performance measures, and dealer and manufacturer reliability, but first, she wants to rate the cost performance on a scale of 0 to 10. If $0 is the best cost, what are the scaled values for the five computers? If the $800 cost of Mr. Value is the best, what are the scaled values for the five computers?
| Computer | Cost |
| Mr. Value | $800 |
| Samsonic | 1100 |
| Graphic Power | 1200 |
| BBC (Big Blue Computers) | 1800 |
| Pear Computing | 2400 |
For example, substitute the $1100 cost of Samsonic in Equation 19.2.
Score(x) = 10(Worst value − x)/(Worst value − Best value) (19.2)
Score(1100) = 10(2400 − 1100)/(2400 − best)
If $0 is the best, then:
Score(1100) = 10(2400 − 1100)/(2400 − 0) = 5.42.
If $800 is the best, then:
Score(1100) = 10(2400 − 1100)/(2400 − 800) = 8.125.
The other results are summarized below.
| $800 best | $0 best | Cost | Computer |
| 10 | 6.67 | $800 | Mr. Value |
| 8.125 | 5.42 | 1100 | Samsonic |
| 7.5 | 5 | 1200 | Graphic Power |
| 3.75 | 2.5 | 1800 | BBC (Big Blue Computers) |
| 0 | 0 | 2400 | Pear Computing |