A consequence analysis software package from Det Norske Veritas. Phast examines the process of a chemical incident from initial release through formation of a cloud or pool to final dispersion, all the while calculating concentration, fire radiation, toxicity, and explosion overpressure.

Phast is used by more than 300 organizations worldwide in hazard analysis. The Phast software package is applicable to all stages of design and operation across a range of chemical and process industry sectors.