Risk Graph / FMEA Catalog

Definition of Risk Graph

The risk diagram definition according to Preliminary Hazard Analysis (PHA) provides the parameters probability, severity and risk acceptance, which are elementary for risk analysis. For this purpose, BAYOOSOFT Themis offers you the option of segmenting the severity and probability axes into any number of gradations (tab 'Severity & Probability') and then assigning each field of the risk graph to a risk area (tab 'Risk Graph').

Severity & Probability

To define the Risk Graph, you can use the button under the ‘Severity & Probability’ tab to create new classifications of severity and probability and describe these (also subsequently using the icon) using an abbreviation, description, criteria and examples.

These elements can be deleted using the icon.

The order in the respective table affects the column or row order in the risk graph. The first entry is therefore always the lowest severity/probability. The last entry is the highest. If you want to change the order, you can drag the individual elements to the desired position using the icon.

Risk Graph

In the same way, you can create areas under the ‘Risk graph’ tab that correspond to the respective risk acceptance. Each area can be assigned a name, description and color. Click in the color box to select a color.

Complete the definition of the Risk Graph by assigning an area to each of the individual fields. This is done by clicking on the respective field. The available graph areas are then displayed as a tooltip and can be assigned by selecting the desired area.

Analysis and Evaluation

Evaluation & Reevaluation

In the program section 'Risk Analysis, Evaluation and Risk Control', you can perform an evaluation and reevaluation of the risk for each cause, based on its severity and probability. The reevaluation is the evaluation after the implementation of measures.

Select a cause in the menu tree or in the list view and select the relevant tab in the details. Alternatively, you can also select the desired function directly and then select the cause.

Define the severity and probability of the cause in the evaluation and reevaluation.

Before and After Overview

The two risk graphs indicate the number of risks situated in the respective field before and after the implementation of measures.

FMEA Catalog

Similarly, a catalog can be created in accordance with Failure Mode and Effect Analysis (FMEA), in order to define the evaluation criteria. To do this, specify Probabilities of Detection, Severities, and Probabilities of Occurrence. Sort these in ascending order of importance.

Specify a Risk Priority Number Limit. It serves to define a threshold above which an error is classified as critical and measures must be taken.

Calculation of the Risk Priority Number

When analysis and evaluation are done, you can see the calculation of the Risk Priority Number in the FMEA-Analysis under Evaluation and Evaluation after Measures of the respective Cause.