Cause-consequence Analysis

Description

The Cause-Consequence Diagram is developed from a certain initiating top event, i.e. an event that initiates a specific operational sequence or an event which activates certain safety systems. The Cause-Consequence Diagram consists of two reliability analysis methods previously elaborated, the FTA and ETA methods.

Effort

High

Complexity

High

Method Type

Quantitative

Semi-Quantitative

ISO 31000

Risk Analysis - Causes/Threats

Risk Analysis - Consequences

Risk Analysis - Likelihood

Risk Analysis - Severity

Prerequisites

  • System or process descriptions must be available
  • Documentation that can already provide information on the causes and consequences of failures should be available

Basic Approach

  1. carrying out a system analysis, i.e. close examination of the system and its interfaces
  2. definition of undesired events (errors)
  3. determination of consequences
  4. determination of the causes and failure probabilities if possible

Advantages

  • Systematic presentation of the causes and consequences
  • Measures for risk minimization can be derived
  • Very comprehensive risk analysis

Disadvantages

  • Training is necessary before the first execution
  • The availability of resources must be guaranteed