Preliminary Hazard Analysis
Preliminary hazard analysis, or PHA, is an early-stage, qualitative technique for identifying the hazards inherent in a system before its design is detailed enough for more rigorous methods, and for ranking those hazards so that the riskiest receive attention first. Conducted in the concept or preliminary design phase, it works from the system's energy sources, hazardous materials, intended functions and operating environment to compile a hazard list, postulate how each hazard could lead to harm, and assign each a risk level from severity and likelihood ratings. The CCPS Guidelines for Hazard Evaluation Procedures present it as a foundational hazard-evaluation method, and ISO/IEC 31010 includes it among standard risk-assessment techniques. Because it is applied when changing the design is still cheap, the PHA's chief value is steering early design decisions and identifying which hazards warrant deeper study by methods such as HAZOP, FMEA or quantitative risk assessment.
Registro de origen
Citas copiadas textualmente del registro de origen del método. No se infiere ninguna verificación a nivel de afirmación de ellas.
- Center for Chemical Process Safety (CCPS). (2008). Guidelines for Hazard Evaluation Procedures (3rd ed.). Wiley-AIChE, Hoboken, NJ. · ISBN 9780471978152
- International Organization for Standardization. (2019). IEC 31010:2019 Risk management — Risk assessment techniques. ISO/IEC, Geneva. · URL
Afirmaciones curadas
Afirmaciones persistidas en el libro mayor de evidencia, cada una con su propia evaluación.
Esta vista no inventa una evaluación de afirmación si el libro mayor no tiene ninguna.
Métodos relacionados
Generado a partir del grafo de métodos y mostrado como relaciones sugeridas por la máquina; no se infiere ninguna afirmación de evidencia.