[FedCom] Interoperability Hamppers Agencies

[Michael Rumberg]

in theory this should be true.  but it depends on the thought and engineering behind the system that puts the lie to this:  not much out there is as complicated as modern jet aircraft.  and they dont crash at 35% rates.....  taken even more to the extreme is the space shuttle and spacefligght/satellite operations.  two out of 100+ plus flights is pretty damn good reliability record.

point being--better planning by better people.



>From: lists <lists at lazygranch.com>
>Date: Sun Oct 16 17:49:23 CDT 2005
>To: Discussion of Federal Government Communications <fedcom at mailman.qth.net>
>Subject: Re: [FedCom] Interoperability Hamppers Agencies

>The more complicated the system, the more likely it is to fail.
>
>The argument goes that if each piece of the system is X  reliable and 
>you have N items in the chain, your reliability is X^N. Ninety percent 
>reliability and 2 items in the chain would  be 81% reliable. Make that 
>10 items in the chain and you are down to 35%.
>
>Trunking by definition can't be more reliable than a non-trunked system.
>
>Jeff Kenyon wrote:
>
>>It will be interesting to see once everyone in Wayne County, Michigan goes
>>to P-25 MPSCS systems, and the existing type II systems are upgraded and
>>become intograted into MPSCS digital system and how many take advantage of
>>features.  In the summer of 2002 I think that our digital system went into
>>failsafe mode after a storm, and it was one of the first of the summer,
>>and we have some VHF radios around, but not much, so in that case I would
>>be in favor of refresher training to remind users of what is available to
>>them, and what to do/expect should a system like that fail and what to
>>expect.
>>	I know that coming from the  vendor they will say nice things
>>about their digital trunked systems, but I had heard good and bad things
>>about the new EDACS digital trunked system in Florida and how it has
>>weathered the last few hurricanes.  M/Acomm says it did a great job, but I
>>am taking that with a grain of salt.
>>  
>>
>
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