Three paramedics were boasting about improvements in their respective ambulance team�s response times. �Since we installed our new satellite navigation system,� bragged one, �we�ve cut our emergency response time by ten percent.� �Not bad,� the second paramedic commented. �But by using a computer model of traffic patterns, we we cut our average time by 20 percent.�

�That�s nothing said the third paramedic. �Since our ambulance driver passed the bar exam, we�ve cut our emergency response time in half!�