Timeliness
The
correctness
quality subfactor,
timeliness, is the degree to which data
remains current (i.e., up-to-date).
Timeliness is typically measured in terms of:
- Maximum time delay between when the:
- Data actually changes
- All views of the data are updated
- Maximum average time delay between data change and data
views are updated
- Minimum percentage of data views updated within a given
time delay
- Maximum percentage of data that is obsolete
See
timeliness requirements.
Typical mechanisms for improving the timeliness of data
include:
The following guidelines have been found to be useful with
regard to timeliness:
- Timeliness is typically measured in terms of
milliseconds, seconds, minutes, hours, or days.
- Timeliness may involve input data (e.g., read from a
sensor), stored data (possibly used in calculations), and/or
output data (e.g., output to another application, an external
database, or the user via the user interface).