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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Expectations or It can't happen to me (was Re: How Reliable)
On Wed, 25 Feb 2004, Bora Akyol wrote: > It needs to be as reliable as the services that depend on it. > > E.g. if bank A is using the Internet exclusively without > leased line back up to run its ATMs, or to interface with > its customers, then it needs to be VERY reliable. That's not very reliable. On a "normal" day, 95% of the cash machines are working nationwide. Telephones, E911, hospitals, nuclear power plants have a variety of "normal" failures all the time. Humans are traditionally very bad at understanding risk. > As more and more critical services/infrastructure moves > to the IP/MPLS, the expectations in terms of reliability > go up every year. The real questions are: > > * How much are the customer's willing to pay for it? > * What kind of reporting/management infrastructure we have > to enforce/monitor the reliability commitment in the SLA? Unfortunately, both of those are marketing issues and have very little to do with actual reliability. One very well-known ISP had a "premium" Internet service that only cost 30% more than its standard Internet service with a 100% SLA. What you received was the same service with an insurance policy. If the service met the SLA you paid 30% more, if it didn't you only paid the standard price. Does buying travel insurance change the risk of the plane crashing?
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