Lecture 9 - Functional Safety: Introduction

Question 1

Define Functional Safety

Answer 1

• “Part of the overall safety relating to the Equipment Under Control (EUC) and the EUC Control system that depends on the correct functioning of the E/E/PE safety-related systems and other risk reduction measures”

Question 2

What are some examples of functional safety?

Answer 2

Cars: automated breaking
Microwave: Stops when opened
Elevator: Obstruction detection

The process: Detect -> Decide -> Act

Question 3

Hierarchy of Controls

Answer 3

Elimination - physically remove the hazard
Substitution - Replace the hazard
Engineering controls - Isolate people from the hazard
Administrative controls - Change the way people work
PPE - Protect the worker with Personal Protective Equipment

Question 4

Examples

Answer 4

REFER TO SLIDES

Question 5

What are the motivations for functional safety

Answer 5

• It’s everywhere and normally hidden.
• Your car, home appliances, have safety functions.
• Good chance you will have interface with it.
• Risk reduction measures interact.
• Structural (Civil), Mechanical Elements (Mechanical), Programs for safety function (Electrical / Software)
• For future managers, automated technologies use functional safety.
• Industry uses Functional Safety to manage risk scenarios that can cause serious injuries, or fatalities.
• Can also be used to mitigate non-personnel safety risk