Requirements and Reliability

Question 1

What are requirements?

Answer 1

A detailed description of what the customer wants. Requirements can be used to test the system once it’s built.

Question 2

What features should requirements have?

Answer 2

Unambiguous
Complete
Verifiable
Consistent
Modifiable 
Traceable

Question 3

What are mandatory requirements?

Answer 3

Necessary conditions a minimal system must have. They are either passed of failed with no middle ground.

Question 4

What are preference requirements?

Answer 4

Conditions that would improve the system. Scoring functions evaluate figures of merit.

Question 5

What is a specification?

Answer 5

A detailed description of what should be constructed, based on requirements.

Question 6

What are RAMS requirements?

Answer 6

Reliability - failure rate
Availability - percentage of time the system is running
Maintainability
Safety

Question 7

What happens to the voltage and capacity of batteries in series?

Answer 7

Voltage doubles

Capacity stays the same

Question 8

What happens to the voltage and capacity of batteries in parallel

Answer 8

Voltage stays the same

Capacity doubles

Question 9

What are the power saving modes and how do they work?

Answer 9

Active - fully functional
Idle - CPU not clocked, peripherals are clocked
Sleep - neither CPU or peripherals are clocked