138 RFID and Auto-ID in Planning and Logistics
This implementation will normally yield a nonzero score even if the project is unacceptable in one
or more factors. However, it is likely that the nal score is signicantly lower than other projects that
do not have any unacceptable factor scores.
Another method of incorporating constraint into the above project selection model is to score any
model that has any unsatisfactory factor scores as a complete 0. This would effectively eliminate
any projects that are unsatisfactory in any manner. Mathematically, this could be represented as
Project score Factor constraint Factor weight Factor score
=
= × ×
i i
i 11
n
∑
where
i = 1–n factors used to evaluate the project
Factor weight = 0–1 for each factor