Group 1

R11: If there are any buttonSignal then there will be an acoustic and optical
warning from multifunctional display.
R12: All accState will also can be seen in multifunctional display.
R13: If there are accelSignal or brakeSignal from the driver when the ACC is
activated then the ACC will be overridden.
Consolidate Requirements
SM1: The system should make the driving more convenience.
Driving will be more convenience when the Driver can easily control the car in
all possible cases. It should be possible to set the current speed as a desired
speed. The car should drive with the desired speed until the driver brakes or
the speed is one minute above the desired speed. The car should accelerate
up to the desired speed when the distance is big enough and decrease Speed
if the speed is lower than the desired speed and the distance are close
enough. It should also be possible to resume to the last default speed after
breaking.
Necessary:
(R1, R2, R3, R4, R5, R6, R8, R9)
• Sufficient :
(R1 ٨ R2 ٨ R3 ٨ R4 ٨ R5 ٨ R6 ٨ R9 ٨ F2 ٨ F3 ٨ F4 ٨ F5 ٨ F6 ٨ F8 ٨ F9 ٨
A2) ٨
(R8 ٨ R9 ٨ F2 ٨ F3 ٨ F4 ٨ F5 ٨ F6 ٨ A2 ٨ A3) ٨ (R5 ٨ F9 ٨ F10 ٨ A2 ٨ A3)
SM1
SM2: The system should make driving of the car safer.
Driving will be safer when the system can easily detects an object in front of
the car. The speed should be automatically decreased when the car ahead (or
another object) is within a certain distance according to the current speed. In
case the system fails, the engine is remotely controlled by actuators which
connect the acceleration pedal with the engine.
٨
Summary:
• Necessary :
(R6, R7, R8)
• Sufficient :
(R6 ٨ R7 ٨ F1 ٨ F2 ٨ F3 ٨ F5 ٨ F6 ٨ F7 ٨ F9 ٨ A2 ٨ A3) ٨ (R8 ٨ F1 ٨ F2 ٨ F3
A3) SM2
R’ = {R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13} (mission critical
requirements)
Requirements R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12 and R13 are
“need to have”
All requirements will be implemented.
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