Nypd Case

NYPD CASE:

18 patrol cars and 6 precints.

Three 8 hour tours of duty:

• 12am-8am (200/1300)

• 8am-4pm (400/1300)

• 4pm-12am (600/1300)

Most all cars are staffed with two officers.

Emergancy calls most frequent in the early evening hours (4pm-12am shift)

Dispatchers are responsible for 2-3 precints.

Police car dispatched to a job:

Average time per incedent = 30 minutes.

Precinct Average Number of Calls/Hour High Priority Calls (%) Total Felonies Per Year Size (SQ.MI)

A 6.4 8.2 10,600 1.9

B 3.8 7.7 6,600 .8

C 2.6 7.3 4,300 5.2

D 3.4 13.8 9,400 1

E 1.5 4 1,800 17

F 6.6 12.2 8,500 1.7

Average Util.

Arival Rate / Service Rate

Precint A: [6.4calls/hr / (18 patrol cars * 2calls/hr] = .1777 or 17.7%

Precint B: [3.8calls/hr / (18 patrol cars * 2calls/hr] = .1055 or 10.5%

Precint C: [2.6calls/hr / (18 patrol cars * 2calls/hr] = .0722 or 7.22%

Precint D: [3.4calls/hr / (18 patrol cars * 2calls/hr] = .0944 or 9.44%

Precint E: [1.5calls/hr / (18 patrol cars * 2calls/hr] = .0416 or 4.16%

Precint F: [6.6calls/hr / (18 patrol cars * 2calls/hr] = .1833 or 18.3%

Optimal Number of Patrol Cars:

Precint A: [6.4calls/hr / (4 patrol cars * 2calls/hr] = .80 or 80%

Precint B: [3.8calls/hr / ( 3patrol cars * 2calls/hr] = .63 or 63%

Precint C: [2.6calls/hr / (2 patrol cars * 2cals/hr] = .65 or 65%

Precint D: [3.4calls/hr / (2 patrol