5-HAZOP

The HAZard and OPerability study (HAZOP) analyses deviations from design intent, according to IEC 61882.

Toolbar

Button / Control	Function
☰ Columns	Visible column selector
📋 Excel	Pastes from Excel
⬇ XLS	Exports to Excel
🎨	Colour settings
👁 View / ✏ Edit	Read / edit mode
✦ AI	AI generation of HAZOP deviations

"Measures to consider" toggle

In the column selector, the Measures to consider toggle displays extra columns:

• Measures to consider — HAZOP recommendations to implement
• G' / P' / C' — residual rating after these measures
• Access to the residual matrix in the Matrices tab

✦ AI button on measures

An inline ✦ AI button in the measures cells generates suggested corrective measures for the deviation concerned.

Method

The analysis proceeds node by node, parameter by parameter, systematically applying every guide word. Do not move to a new node before exhausting every relevant guide word on the current node.

HAZOP table columns

Column	Description
Node	Section of the plant being analysed (selected from the model)
Parameter	Variable studied (flow, pressure, temperature, level, composition…)
Guide word	Modifier: More / Less / No / Reverse / Other than / Part of / Early / Late
Deviation	Full wording = parameter + guide word (e.g. Higher flow than expected)
Causes	Possible origins of the deviation
Consequences	Effects on safety, environment, quality, production
Existing measures	Protections already in place (instrumentation, procedures, training)
G	Severity of the deviation
P	Probability
C	Criticality = G × P
Measures to consider	(if the option is enabled) Additional recommendations
G' / P' / C'	Residual rating after measures to consider

HAZOP Metrics / Matrix tab

Same principles as the PHA — configurable independently. Metrics sub-tabs: Severity, Likelihood, Risk levels, Matrix — each with ＋ Add and ↺ Reset buttons.

Measures tab

Table of every planned measure (HAZOP recommendations), with status tracking.