5.1.1 Computer-based systems should be designed
for ease of handling and user-friendliness and should follow ergonomic
principles.
5.1.2 The operational status of a computer-based
system should be easily recognizable.
5.1.3 A user guide should be provided. This user
guide should describe for example:
- function keys
- menu displays
- computer-guided dialogue steps, etc.
5.1.4 An alarm should be displayed at relevant
operator stations for failure or shutdown of a subsystem.