Dynamic System Status Management

System Status Management (SSM) is the fluid deployment of ambulances based on the hour-of-the-day and day-of-the-week in order to match supply, defined as Unit Hours of Utilization (UHU), with expected demand, expressed as calls for service, in the attempt to provide faster response by locating ambulances at “posts” nearer their next calls. áWhile the practice is still notáunanimously embraced by all services, it has a sound foundation both in theáresearch literature dating back to the 1980′s as well as in practice today. áExperience has shown that ambulance response times can be dramatically decreased using this type of dynamic deployment, but it is also recognized that it is possible to reduce performance when these techniques are not applied properly. áThe direction of the results of a system implementation are typically influenced by the system design, competence of the managers creating the plan, and commitment of the workforce in implementing it. áTherefore the best practice is a simple and straightforward implementation that will show positive results quickly. áThis methodology ensures a positive return on investment along with garnering the necessary buy-in from staff to make the project a success.

In his article, “System Status Management – The Fact is, It’s Everywhere“, ápublished in the Journal of EMS (JEMS) magazine back in 1989, Jack Stout explained the concept of SSM and tried toádispelácertain myths. áBased on foreseen Geographic Information System (GIS) technology and even general computing capabilities of that time, it was quite logical to assume in his Myth #2 that “no matter how thoroughly the response zone concept is fine-tuned in practice, it cannot be made to cope effectively with the dynamic realties of the EMS environment.” áBut systems implemented today around the US are capable of calculating dynamic response zones in a small fraction of a second while even being based on time-aware historic driving patterns making a truly dynamic system status management process a reality. áA practical and proven example of a dynamically functioning system status management application is the Mobile Area Vehicle Routing and Location Information System, or simply MARVLIS.

The following Slideshare presentation does an excellent job of telling the story of why and how the system works:

High Performance EMS is MARVLIS[slideshare id=8765718&w=425&h=355&sc=no]

View more presentations from hp_ems

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High Performance EMS

High Performance Emergency Medical Services (HP-EMS) systems provide effective clinical care promoting positive patient outcomes and community wellness while maintaining a focus on improving economic efficiency of the system.  This site is dedicated as a community seeking to increase agency performance by promoting useful information regarding the developing trends and improvements in the efficiency of delivering basic and advanced medical care in the field.

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Comments
Brett Snow
We Need Some New Stories
I have been in the fire/ems service for 26 years and was the youngest certified paramedic in the State of Nevada at the time I began. I learned from the best and never became an "SOP" paramedic. I treated my patients with knowledge gained from personal experience and lessons learned from myself as well as…
2015-03-19 16:18:54
EJS
Did You Watch ‘Nightwatch’ Last Night?
What they said is pretty much true. Medics do the majority of things the er will do. I do ems and lots of time in an er. The er for about 90% of pts er will do the same stuff ems will do except just having a doctor tell the pt they are healthy. Yes…
2015-03-12 22:00:54
Thomas Roberts
Impressions of the Ferno iN/X
We've done some pretty substantial research on offerings from both Stryker and Ferno. What we've found is information that is both in line and conflicting with some of the prior comments on this page. The Stryker power cot is a heavier device in comparison to their old manual cots, however you can't compare the Stryker…
2015-03-04 09:13:07
WES
Impressions of the Ferno iN/X
Anybody know the price of the new ferno system?
2015-02-12 20:36:38
Paul
Is ‘SSM’ Still a ‘Bad Idea’?
I think that the majority of you that talk about a unit sitting on a dirty street corner for 12 hrs at a time don't realize that if they are doing that, the system doesn't need SSM.
2015-02-05 09:33:18

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