Safety Goals

L3 20 L HARA Safety Goals

Lane Keeping Assistance Safety Goals

What about the lane keeping assistance function? In this case, the hazardous situation involved the driver taking both hands off the wheel. Because the functionality was always on, the driver could misuse the lane keeping assistant as if it were meant for autonomous driving. What would the safety goal be for this second case?

Lane Keeping Assistance Safety Goal

What would the safety goal be for the lane keeping assistance example?

The lane keeping assistance function shall provide a low enough torque to the steering wheel such that the driver cannot feel the system working.

The lane keeping assistance function shall provide torque to the steering wheel such that the vehicle moves away from the center of the lane.

The lane keeping assistance function shall only turn on when it is raining.

The lane keeping assistance function shall be time limited and the additional steering torque shall end after a given time interval so that the driver cannot misuse the system for autonomous driving.

SOLUTION:

The lane keeping assistance function shall be time limited and the additional steering torque shall end after a given time interval so that the driver cannot misuse the system for autonomous driving.

Safety Goals and Requirements Engineering

In the first lesson, we mentioned that requirements engineering was a sub-discipline of systems engineering. Requirements generally start with the phrase "X system shall [do something]".

Safety goals are a specific type of engineering requirement. Safety goals specifically define what the vehicle needs to do in order to remain safe.

Safety Goal ASIL

SOLUTION:

B