validity checking

Routines in a data entry program that test the input for correct and reasonable conditions, such as account numbers falling within a range, numeric data being all digits, dates having a valid month, day and year, etc. Checking the spelling of proper names, if possible, can also be part of validity checking. See validate for a comparison of "validate" and "verify."

Errors Can Be Critical
It may seem like a dull part of the IT world, but data entry validation can be a very critical issue when there is insufficient validity checking of the input. In late 2001, a Japanese stockbroker erroneously placed a sell order for 610,000 shares of stock at 16 yen, when it should have been for 16 shares at 610,000 yen. Even though the error was caught two minutes after the order was placed, the broker's liability was estimated to be up to $100 million dollars.

Additionally, due to the sporadic nature of their usage, system administrators must devise and implement testing regimens to ensure continued proper functioning of the systems through data validity checking, media checking, log management, and other standard system administration management techniques.

Planning for backup and recovery: the key elements for a successful ... by Dow, James / Computer Technology Review

Database administrators use several validity checking techniques against false positives, including a requirement that multiple users submit a possible spam message before the database adds a signature.

The big squeeze: closing down the junk e-mail pipe by Ready, Jeff / Computer Technology Review

By simplifying the tasks of cabling, configuration specification and validity checking in the SAN, SANexec Designer minimizes the overhead associated with preparing and configuring any size configuration from a small environment to a large-scale, enterprise SAN incorporating a sophisticated switch such as the SilkWorm 12000.

SANexec Designer Enhances SAN Design and Planning Capabilities for ... by Business Wire

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