Event Tree Analysis - The Risk Assessment Application Tool

Event tree analysis is applicable to risk assessment and safety system engineering. It is used to determining the success paths and providing solutions to avoid dangers and accidents.

What is Event Tree Analysis?

Originating from decision tree analysis, event tree analysis becomes an accident-cognition method of deducing possibilities and outcomes in a chronological order. This approach uses a tree diagram called "event tree" to describe the logical relationship between probable accidents and potential reasons. Through the qualitative and quantitative analysis of the event tree, users can find the main reasons of accidents and provide reliable solutions so as to reach the purpose of speculating and preventing accidents.

What is Event Tree Diagram

Qualitative Analysis of Event Tree

Qualitative analysis process occurs along with designing process. For this reason, before drawing the event tree, you should analyze the possibility of each process and probable status of each path in accordance with characteristics and objectives of the event. After designing the event tree, you need to find types of an accident occurring path and solutions to accident prevention.

Qualitative Analysis Event Tree

Quantitative Analysis of Event Tree

Quantitative analysis of event tree, based on the occurrence of an event, determines the accident occurring path by calculating each path of occurrence probability, comparing values of probabilities and sequencing through the possibility of an accident. Basic terms are shown as follow.

Quantitative Analysis Event Tree

The analysis of the event tree provides a clear basis for the development of the incident, and it provides a strong basis for the design of the accident prevention plan and the development of the accident prevention measures.

According to event tree analysis, the final accident is the result of a set of hazards. If ending the development process in time, the accidents might be avoided. Thus, in each stage of accident occurrence, steps should be taken to control the possibility, thus decreasing the occurrence probability and lead to a safe development path.

Now you may have a better understanding of the event tree analysis. Try drawing with Edraw diagramming software, you may find it easy to use without drawing skills required.

Event Tree Diagram Software

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Event Tree Diagram Template

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