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One
of the most difficult areas for managing data is data entry, in which humans
type information into a system or database. The primary issue is trying to
maintain high levels of accuracy. Again, information technology has begun to
address this issue:
· Data entry by
humans should be avoided as much as possible. For instance, no data should be
entered twice: a single source of each type of data should be established and
used to populate other databases.
· Object-oriented
data should be used, so that applications and database tools can be used as
much as possible to automate the data entry process.
· Data should be
validated as much as possible during the data entry process. This validation
should include reasonability and consistency checking as well as format
checking. Roll-back and two-step entry procedures should be used where critical
functions must have accurate data.
· Applications
using this data should validate it as well, to avoid “crashes” and security
violations.
· Logs should be
kept of all data entries.
· Data backup of
all important data should be provided.
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