Suggest appropriate reliability metrics for the classes of software system below. Give reasons for your choice of metric. Predict the usage of these systems and suggest appropriate values for the reliability metrics.

• a system that monitors patients in a hospital intensive care unit
• a word processor
• an automated vending machine control system
• a system to control braking in a car
• a system to control a refrigeration unit
• a management report generator

See following table. Note that the values in this table are really quite arbitrary and

you need to know more about the domain to set accurate values. Any values which

take into account the type of system involved are equally good.