ABSTRACT
Another important availability-level consideration is in
the expression of availability. While the availability level
is most often expressed as a percent, it is important to
consider what the percentage represents. For example, an
availability level of 99.1% for a 30 day month means that
the service provider can have the following outage duration
per month:
30 days 24 hours=day 0:009; or 6:48 hours
This means that an organization needs to examine
availability expressed as a percentage and convert that
percentage into a time period. Then, one needs to ask if
the organization is willing to allow the service provider to
have, as per this example, almost seven hours of access
outages per month.
