Communications between application and user

For each application, specify the type of terminal the user is to work with.

Decide if you will provide special procedures to overcome communication problems; for example:

Allow the user to continue work on an alternative terminal (but with appropriate security precautions, such as signing on again).
In cases where the user’s terminal is attached to a programmable controller, determine the recovery actions that controller (or the program in it) is capable of providing.
If a user’s printer becomes unusable (because of hardware or communication problems), consider the use of alternatives, such as the computer center’s printer, as a standby.