• The elements (equipment, material) are designed properly and of high quality, and will remain so.

• The operating procedures are appropriate and the staff that is responsible for their application is competent.  

• The operation is carried out by persons applying a sound “safety culture”. 

By way of example this could be compared to a car:

For a car to be safe on the public highway

• it should dispose of the appropriate safety devices (brakes, airbags,…) 

• the driver should be acquainted with the traffic regulations and the piloting techniques (in other words, he should possess a valid driving license) 

• the driver should obey the traffic rules and adopt a safe attitude in traffic.