An abbreviation for hazard identification, it is a systematic and wide-ranging structured hazard analysis technique used to identify the potential hazards at an early stage in process design and development. It is applied once details of process materials and flows presented in a flowsheet have been quantified. HAZID considers both internal and external events such as weather effects, and seeks to broaden the hazard understanding of those involved by encouraging lateral thinking. Whereas HAZOP is cause-driven, HAZID is consequence-driven. HAZOP can accept a conclusion that an event will not occur, while HAZID assumes that an event will occur and consequently requires a rigorous analysis of the sequence of events for it to occur.