We seek to eliminate harm on our people, the public and the whole enviroment.
The primary goal of safety is to manage risk, eliminating or reducing it to acceptable levels. Risk is the combination of the probability of a failure event, and the severity resulting from the failure.
For instance, the severity of a particular failure may result in fatalities, injuries, property damage, or nothing more than annoyance. It may be a frequent, occasional, or rare occurrence.
Safety attempts to reduce the frequency of failures, and ensure that when failures do occur, the consequences are not life-threatening. For example, bridges are designed to carry loads well in excess of the heaviest truck likely to use them. This reduces the likelihood of being overloaded. Most bridges are designed with redundant load paths, so that if any one structural member fails, the structure will remain standing. This reduces the severity if the bridge is overloaded.
Ideally, safety starts during the early design of a system. Safety engineers consider what undesirable events can occur under what conditions, and project the related accident risk.
They may then propose or require safety mitigation requirements in specifications at the start of development or changes to existing CAD designs or in-service products to make a system safer. This may be done by full elimination of any type of hazards or by lowering accident risk.
Far too often, rather than actually influencing the design, safety engineers are assigned to prove that an existing, completed design is safe.
If the engineers discovers significant safety problems late in the development process, correcting them can be very expensive. This type of error has the potential to waste large sums of money and likely more important, human lives and environmental damage.
Thus these general safety tips must be highly considered