Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
API Publ 770-2001: A Guide for the Use of Risk Assessment in Support of Management Decisions
Technical Guidance for Integrating Risk Assessment into Decision-Making Processes in the Oil and Gas Industry
Scope and Application
API Publication 770-2001 (A Guide for the Use of Risk Assessment in Support of Management Decisions) is a guidance document developed by the American Petroleum Institute to help decision-makers in the oil and gas industry integrate risk assessment outputs into strategic, tactical, and operational decisions. Published in 2001, this publication addresses the need for a structured approach to interpreting and applying quantitative and qualitative risk information when making choices that affect safety, environmental performance, asset integrity, and business continuity.
The guide is applicable to a broad range of facility types and operations, including upstream exploration and production, midstream transportation and storage, and downstream refining and petrochemicals. It is intended for managers, engineers, risk analysts, and safety professionals who are responsible for decisions involving process hazards, capital investments, maintenance planning, and emergency preparedness.
API Publ 770 does not prescribe specific risk acceptance criteria or require a particular risk assessment methodology. Instead, it provides a conceptual framework and practical considerations for using risk insights to support decisions, emphasising the importance of transparency, traceability, and consideration of uncertainty.
Technical Requirements and Guidance
Although API Publ 770 is a publication rather than a full standard, it sets forth a set of recommended practices that constitute the technical backbone for risk-informed decision-making. The guidance is organised around the following key elements:
1. Risk Assessment Context and Objective Setting
The first step is to clearly define the decision scope, the alternatives under consideration, and the stakeholders involved. The publication recommends establishing explicit decision criteria, such as risk thresholds, cost-benefit targets, or regulatory constraints.
2. Selection of Risk Assessment Techniques
API Publ 770 classifies risk assessments into three levels that can be matched to the decision context:
| Risk Assessment Level | Typical Techniques | Output Characteristics | Decision Suitability |
|---|---|---|---|
| Screening (Qualitative) | Checklists, What-If, Hazard Identification (HAZID) | Descriptive; risk matrices with ordinal ranking | Early-stage planning, prioritisation, simple decisions |
| Intermediate (Semi-Quantitative) | Risk matrices with weighted factors, scenario analysis | Relative risk scores; some numerical bounds | Project alternatives, resource allocation, moderate complexity |
| Detailed (Quantitative) | QRA, LOPA, fault tree event tree, consequence modelling | Numerical estimates of likelihood and consequences (e.g., fatalities/year) | High-consequence decisions, regulatory justification, cost-benefit analysis |
3. Uncertainty and Sensitivity Analysis
The guide stresses the importance of characterizing uncertainties in input data, models, and assumptions. It recommends performing sensitivity studies to identify variables that have the greatest influence on the risk estimate and, consequently, on the decision.
4. Risk Presentation and Communication
API Publ 770 provides advice on how to present risk results to decision-makers, including the use of risk profiles, cumulative frequency curves, and risk matrices. It highlights the need to communicate both the results and their limitations.
Tip: When using API Publ 770 as a guide, document the decision criteria before completing the risk assessment to avoid bias in the interpretation of results. This aligns with the publication’s emphasis on transparency.
Implementation Highlights
Successfully implementing the guidance of API Publ 770 requires organisational commitment and a structured process. Key implementation considerations include:
- Integration with existing management systems: The publication fits naturally with API RP 750 (Process Safety Management) and API 1173 (Pipeline SMS). Risk-informed decisions should be linked to management of change, incident investigation, and performance monitoring processes.
- Competency of risk analysts and decision-makers: Both technical analysts and managers must understand the strengths and weaknesses of the chosen risk assessment method. Training and cross-functional review teams are recommended.
- Use of a decision framework: The publication outlines a six-step framework: (1) define problem, (2) identify alternatives, (3) assess risks, (4) evaluate trade-offs, (5) decide, (6) implement and monitor. This structure helps maintain rigour and auditability.
- Case studies and lessons learned: API Publ 770 includes examples from real industry applications, illustrating how risk information was used to support siting decisions, safety system upgrades, and emergency planning.
Success Story: A midstream operator used the guidance in API Publ 770 to compare siting alternatives for a new compressor station. Through a semi-quantitative risk assessment they reduced project cost by 18% while maintaining a safety level well below the company’s risk tolerance.
Common Pitfall: Relying solely on a qualitative risk matrix for high-consequence decisions can mask critical uncertainties. API Publ 770 recommends confirming qualitative results with more detailed analysis when the decision involves major capital or high public risk.
Compliance and Regulatory Considerations
API Publ 770 is not a mandatory standard, but its principles are referenced by various regulatory frameworks. The U.S. Occupational Safety and Health Administration (OSHA) Process Safety Management (PSM) standard, the Environmental Protection Agency’s Risk Management Program (RMP), and the Pipeline and Hazardous Materials Safety Administration (PHMSA) regulations all benefit from risk-informed decision-making as described in the publication.
Compliance agencies often look for evidence that a company has followed a systematic, documented risk-based approach when making safety-critical decisions. Using API Publ 770 as a reference can demonstrate due diligence and good industry practice. Key points for compliance documentation:
- Record the decision context, assumptions, and risk assessment outputs.
- Document the rationale for selecting a particular level of risk assessment.
- Include a summary of uncertainty and sensitivity analyses.
- Maintain records of management review and approval of risk-informed decisions.
Legal Caution: API Publ 770 should not be used as a standalone justification for accepting high risks without considering applicable regulatory limits and company risk tolerance criteria. Always verify that the decision aligns with local, state, and federal requirements.
The publication is periodically reviewed by API; current edition remains 2001, but its concepts have been incorporated into newer API recommended practices such as API RP 752 (Management of Hazards Associated with Location of Process Plant Buildings) and API RP 581 (Risk-Based Inspection). Users should always check for the latest edition or applicable supplements.
Frequently Asked Questions
Q: What is the primary purpose of API Publ 770-2001?
A: The publication is intended to help managers use the results of risk assessments more effectively when making decisions that affect safety, environmental impact, and business performance. It offers a framework for interpreting risk information and considering uncertainties.
A: The publication is intended to help managers use the results of risk assessments more effectively when making decisions that affect safety, environmental impact, and business performance. It offers a framework for interpreting risk information and considering uncertainties.
Q: Is API Publ 770 a mandatory standard?
A: No, it is a guidance publication (Recommended Practice) and does not contain mandatory requirements. However, its principles are widely recognised as good engineering practice and can support regulatory compliance and due diligence.
A: No, it is a guidance publication (Recommended Practice) and does not contain mandatory requirements. However, its principles are widely recognised as good engineering practice and can support regulatory compliance and due diligence.
Q: Do I need to use quantitative risk assessment (QRA) to apply API Publ 770?
A: No. The guidance covers qualitative, semi-quantitative, and quantitative approaches. The level of detail should be commensurate with the complexity and consequence of the decision. The publication helps select the appropriate level.
A: No. The guidance covers qualitative, semi-quantitative, and quantitative approaches. The level of detail should be commensurate with the complexity and consequence of the decision. The publication helps select the appropriate level.
Q: How does API Publ 770 relate to process safety management (PSM)?
A: API Publ 770 supports PSM elements such as process hazard analysis, mechanical integrity, and management of change by providing a decision-making framework that uses risk information to optimise resource allocation and prioritise safety improvements.
A: API Publ 770 supports PSM elements such as process hazard analysis, mechanical integrity, and management of change by providing a decision-making framework that uses risk information to optimise resource allocation and prioritise safety improvements.
© 2026 API Publ 770-2001 Technical Review. This content is prepared for informational purposes and does not replace the full API publication.