McCormick et al. (1972) give a ranking, on the scale of 0 to 2, of the degree (subjectively determined) to which each of a total of 53 military aircraft can perform one or more of a total of 27 functions. This yields the following object/attribute matrix:
![](https://test.transtutors.com/qimg/c4b99316-a408-461b-9a3f-0fdd670d55d5.png)