
Systems testing and implementation
conflict of use will almost always have to be resolved when
converting manual files.
Thirdly, the converted data records may have to be updated
before the new system goes live. For example, suppose it takes
longer than a week to convert the data of weekly paid employees.
Then the data of the first employees to be converted will be
a
week
out of date. In practice, payroll is unlikely to present major
problems of this type because the number of records is normally
measured in hundreds and there is an accepted processing cycle.
But a sales ledger, by contrast, could present enormous
difficulties. Here the numbe ...