EXERCISE 10-15 (CONTINUED) ALTERNATIVE SOLUTION

2. Performance measures that are ratios or percentages present special dangers. A ratio can be increased either by increasing the numerator or by decreasing the denominator. Usually, the intention is to increase the numerator in the ratio, but a manager may react by decreasing the de-nominator instead. In this case (which actually happened), the manag-ers pulled telephones out of the high-crime areas. This eliminated the problem for the managers, but was not what the CEO or the city offi-cials had intended. They wanted the phones fixed, not eliminated.