I am working on a project using Network Analyst to determine official emergency response zones for fire departments. The shape of each zone will be determined by the network (at least 1 department must arrive at the destination within 4 minutes of drive time), and each zone will be attributed with station numbers in order of most accessible resources.
For example, one zone might be attributed with 3, 2, 5, which means Station 3 is the first to respond to that zone, and if they need more resources (or 3 isn't available), Station 2 is dispatched, and the same with Station 5. The end result will be a map showing each zone, labeled with each station number in order.
I have found good information on NFPA standards, which are standards that firefighters follow in the United States, such as:
- first vehicle must arrive within a travel time of 4 minutes
- all companies assigned on the first alarm must arrive within an 8 minute travel time
But I haven't found any standards on how to perform the analysis. This ESRI white paper describes how ArcGIS can be useful for fire response, but doesn't go into too much detail.
I have done service area analyses before using Network Analyst, so I am not asking for steps to perform this. What I need to know though, is are there any standard ways, or common practices, that emergency response network analyses are done? Or is this typically handled using whatever methodology the customer agrees to or suggests?
For example, in this case the customer said that assuming 35 mph in town and 50 mph out of town sounds good, so we'll go with that. Adding global turn delay values makes the analysis more realistic as well. But for these assumptions, I want to be sure that I'm not reinventing the wheel. If there are already standards or best practices for these assumptions (for emergency response), I want to follow them.