This very informative infographic helps to detail the decision process for controlling hazards and implementing PPE for identified hazards.  As the graphic shows, elimination of the hazard or installing engineering controls are the most sustainable means for eliminating hazards while PPE is the last resort as the hazard is still present.

If PPE is to be used it must be implemented properly, and as the infographic details, the recommended path for implementation has multiple steps to ensure that the chosen PPE is adequate and correct for the identified hazard.