The output mission (e.g., sales invoice printout, and red alarms when temperature rises above 250°F).
The required accuracy of those outputs that can be adversely affected by inaccurate data or inaccurate calculations.
The completeness of the output information, which can be adversely affected by incomplete data.
The up-to-dateness of the information (defined as the time between the event and its consideration by the software system).
The availability of the information (the reaction time, defined as the time needed to obtain the requested information or as the requested reaction time of the firmware installed in a computerized apparatus).
The standards for coding and documenting the software system.