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 V-Z
Variance analysis
A variance is the difference between planned, budgeted or standard cost and
actual cost (or revenues). Variance analysis is an analysis of the factors that
have caused the difference between the predetermined standards and the actual
results. Variances can be developed specifically related to the operations
carried out in addition to those mentioned above.
version
An identified instance of a Configuration Item within a product breakdown
structure or Configuration Structure for the purpose of tracking and auditing
change history. Also used for Software Configuration Items to define a specific
identification released in development for drafting, review or modification,
test or production.
version identifier
A version number, version date, or version date and time stamp.
virtual memory system
A system that enhances the size of hard memory by adding an auxiliary storage
layer residing on the hard disk.
Virtual Storage Interrupt (VSI)
An ICL VME term for a page fault.
vulnerability
A weakness of the system and its assets, which could be exploited by threats.
warm stand-by
See "intermediate recovery".
waterline
The lowest level of detail relevant to the customer.
Work-around
Method of avoiding an incident or problem, either from a temporary fix or from a
technique that means the customer is not reliant on a particular aspect of the
service that is known to have a problem.
workloads
In the context of Capacity Management Modeling, a set of forecasts which
detail the estimated resource usage over an agreed planning horizon. Workloads
generally represent discrete business applications and can be further subdivided
into types of work (interactive, timesharing, batch).
WORM (Device)
Optical read only disks, standing for Write Once Read Many.
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