Hazard and Operability Analysis HAZOP - Hazop+ from Isograph

Hazop+ - Risk Ranking

The risk ranking option consists of four separate data sheets. These are described below.

Using Hazop Risk Rankings

The Risk Ranking Independent Study Headings data sheet allows the user to select any number of text type study headings for use as the independent study heading in a risk ranking matrix. Each of the independent study headings has a range of values associated with it. For each of these heading values (combined with any other independent study heading values associated with the risk ranking matrix) risk ranking values must be entered into any risk ranking matrix using this heading.

The Risk Ranking Dependent Study Headings data sheet allows the user to select any number of text type study headings for use as the dependent study headings. Each dependent study heading selected creates a risk ranking matrix. Each dependent study heading has a set of values associated with it. By default these are I, A and N (short for Intolerable, Acceptable and Negligible) . These are suggested values for use in the risk ranking values, other values may also be entered apart from these.

The Risk Ranking Association data sheet allows the user to create to associate one or more independent study headings with a dependent study heading. Each dependent study heading selected creates a risk ranking matrix and each associated independent study heading corresponds to a column in the risk ranking matrix.

The Risk Ranking Values data sheet allows the user to set the values of all the independent study heading value combinations in each of the risk ranking matrices.

The screen shot below shows the Risk Ranking Values data sheet:

Hazop Risk Rankings - Hazop+ from Isograph