HAZOP Assistant

Every node × guideword × parameter, pre-considered before the session starts.

Upload a P&ID page. The system walks each node, applies the full guideword × parameter matrix, pre-fills every cell with credible deviations, causes, consequences, and safeguards. The team reviews; the session shrinks by days.

Book Intro Call Try the Demo

SeverityFindingRecommendationConfidence

HIGH
N-02 · More Temperature
Thermal runaway of catalyst bed
High-high T trip on TT-202/TT-203 closes inlet ESDV and opens blowdown to flare per API 521 §4.7.
HIGH
HIGH
N-02 · More Pressure
Reactor vessel overpressure
Install PSV on R-201 sized for thermal-runaway scenario per API 521 §4.7.
HIGH
HIGH
N-02 · Less Flow
Less / no flow through catalyst bed
Add differential-pressure indication across the catalyst bed with high alarm.
MEDIUM
HIGH
N-01 · More Pressure
More pressure on reactor feed line
Install inlet PSV at MX-10-20-100 sized for blocked-discharge per API 521 §4.4.
HIGH
HIGH
N-01 · Less Flow
Less / no reactor feed flow
Add flow indication and low-flow trip on reactor feed per IEC 61511.
HIGH
HIGH
N-01 · As Well As Composition
Catalyst poisons in feed (S, O₂, H₂O)
Install online H₂ purity / S / O₂ / H₂O analyzers on MX-10-20-100 per ISA RP-12.13.
MEDIUM
HIGH
N-03 · Other Than Operability
High-T / high-P flange leak at reactor outlet
Specify spiral-wound gaskets per ASME B16.20 and document retorque schedule per API 510.
MEDIUM
HIGH
N-03 · No Maintenance
No emergency shutdown valve at reactor outlet
Install ESDV on MX-20-01-100 with shutdown logic per IEC 61511.
HIGH
HIGH
N-04 · More Pressure
T-201 vessel overpressure
Install PSV on T-201 sized for blocked-outlet and reactor-runaway per API 521 §4.4 + §4.7.
HIGH
HIGH
N-04 · More Level
T-201 high level (carry-over to recycle compressor)
Replace level switch with LT plus high-high trip closing reactor feed and bottoms valve.
HIGH

10 HIGH (visible)

€10.474 · 110h saved·per HAZOP study

How It Works

Drawing in, pre-filled HAZOP worksheet out.

Upload

Step 01 — Input

Upload a P&ID page. PDF and PNG accepted. No legend required — the initiator falls back to ISA-5.1 standard symbology for unlabelled symbols.

Matrix Fill

Step 02 — Node walk × guideword × parameter

The initiator walks 6–12 nodes per drawing, crosses each against the full guideword set (No/None, More, Less, As Well As, Part Of, Reverse, Other Than) and all applicable parameters (flow, pressure, temperature, level, composition, reaction). Every combination that yields a credible deviation gets a row.

Score & Output

Step 03 — Four-category severity + Excel

Each deviation row is scored on four severity categories (safety, environment, asset, production), cross-checked against safeguards visible on the drawing, and paired with a recommendation. Output is a drop-in Excel worksheet ready for the HAZOP session — plus a coverage heat-map showing which nodes and guidewords were most active.

Core Capabilities

What the system does with your drawings before the session opens.

Full Guideword × Parameter Matrix

Systematic Coverage

All seven guidewords applied to every node

No/None, More, Less, As Well As, Part Of, Reverse, Other Than — applied to every applicable parameter (flow, pressure, temperature, level, composition, reaction, utilities). No guideword–parameter combination is skipped silently.

6–12 nodes per drawing, node-by-node

Each major node — compressor train, heat exchanger, separator, reactor, column, header — is treated individually. Deviations are anchored to the node's operating envelope, not to the drawing as a whole.

Four-Category Severity Scoring

Structured Risk

Safety · Environment · Asset · Production

Each deviation is scored on all four consequence categories. A process upset that is low safety risk but high production risk gets the right priority for the right audience — operations vs. safety vs. asset integrity.

Scored from visible safeguards, not assumptions

Severity accounts for safeguards drawn on the P&ID: relief devices, interlocks, alarms, check valves. Rows where no safeguard is visible carry a higher residual score and a note.

Drop-In Excel + Coverage Heat-Map

Session-Ready Output

Excel worksheet formatted for the session

Output is a standard HAZOP worksheet: Node / Item / Guideword / Deviation / Causes / Consequences / Safeguards / Actions. Import directly into your study template — no reformatting.

Coverage heat-map for the study leader

A node × guideword heat-map shows which combinations generated deviations, which were clean, and which had low-confidence cells. The study leader sees coverage at a glance before the session opens.

We will pre-fill your first HAZOP for free

Send one P&ID page. Within 24 business hours we email you a sample HAZOP worksheet on your drawing. Manual processing, no upsell.

Try with your drawing

The HAZOP bottleneck

From Blank Worksheet to Pre-Filled Session Package

Session From Scratch

6–8 engineers · 2–5 days per study

Session room with 6–8 engineers

expensive

Apply guideword matrix from blank worksheet

slow

Score severity / likelihood by hand

repetitive

Look up code references mid-discussion

interrupts flow

Blank worksheet, every nodeDays / Weeks

With HAZOP Assistant

Pre-Filled Session Package

Same scope, fraction of the room time

Upload P&ID page

minutes

Walk every node × guideword × parameter

per page

Score 4-category severity, cross-check safeguards

instant

Drop-in Excel + coverage heat-map

immediate

Full matrix, every drawingMinutes

The Team Still Decides

Guideword application, deviation enumeration, and safeguard cross-check are repeatable. The tool does those. The session handles what requires operating experience and consensus.

ROI Estimate

Estimated Session Hours Saved

Based on typical HAZOP session effort: drawings × session days × people in the room × hours per day, reduced by the share of guideword application / deviation enumeration / safeguard cross-check that the tool can pre-fill before the session starts.

Your Inputs

Drawings per study

10 drawings

Session days per drawing

0.75 days

People in the session room

7 people

Session hours per day

6 hrs

Engineer hourly rate

95 €/hr

Session time reduction

35 %

Live estimate

Estimated Savings

110

manhours saved — per HAZOP study

€10.474

estimated cost savings

Baseline session effort315 manhours

Reduction rate35%

Hours saved110 manhours

At €95/hr€10.474

Indicative figures — actual values are determined per project during scoping.

You define safe. We map to it.

P&IDs are trade secrets. Before we talk controls, tell us what your IT, legal, and IP teams need to see. Common asks we've met: per-upload isolation, no model training, files deleted on delivery, EU-hosted processing, self-hosted deployment. The evidence below is what we can already point at.

No Model Training

Zero Retention

Uploaded drawings are never used to train models. Period.

Isolated Sessions

Per-Upload Isolation

Each upload runs in its own session. No data crosses between projects, clients, or users.

Deleted After Processing

Automatic Cleanup

Files are removed from processing servers once the worksheet is delivered. Retention window configurable.

Encrypted & Authenticated

TLS/SSL + Your SSO

TLS/SSL in transit. Authentication via your existing sign-in. Every action logged for audit.

Full security posture, NIS2 control mapping, and subprocessors at /trust.

What Changes for Your Team

Concrete differences you will notice in the first HAZOP study.

Session Starts at Review, Not Enumeration

Speed

The blank-worksheet phase of every node disappears. The team walks in to a pre-filled draft and spends the session on judgment and consensus, not on applying the guideword matrix from scratch.

Same Matrix, Every Drawing

Consistency

All seven guidewords applied to all applicable parameters, identically, across every page and every node. No variation between facilitators, sessions, or study teams.

Tag-Anchored, Not Generic

Evidence on Every Row

Every deviation names the tags involved and references a drawing locator. Reviewers verify the row by glancing at the P&ID, not by interpretation.

See three more▾

Nothing Skipped

Full Coverage

Session fatigue and time pressure skip guideword combinations. The tool does not. Every node, every guideword, every applicable parameter.

Four-Category Scoring

Right Priority, Right Audience

Safety, environment, asset, and production scored separately. Operations prioritise differently than asset integrity — the worksheet gives each discipline what they need.

No Fabricated Safeguards

Visibility-Bound

If a safeguard is not drawn on the sheet, the row reads 'None visible on this sheet.' No hallucinated trips, no invented interlocks. The worksheet is honest about what's on the drawing.

What HAZOP Assistant won't do

Where the tool stops and the session takes over. On purpose.

Does not chair the sessionFacilitation stays human: The tool pre-fills the worksheet. Facilitation, consensus, and sign-off stay in the room.
No invented safeguardsDrawing-grounded only: If a trip, interlock, or alarm is not drawn on the sheet, the row reads ‘None visible on this sheet.’ No fabricated controls.
Not a LOPA or SIL replacementPre-fill only: It pre-fills the HAZOP worksheet; quantitative layer-of-protection analysis and SIL determination stay in their own studies.

Mission

The Tool Pre-Fills. The Session Decides.

Most of a HAZOP session's first day is spent applying the guideword matrix from a blank worksheet. Walking each node, crossing it against No/None, More, Less, As Well As, Part Of, Reverse, Other Than for every applicable parameter, listing credible deviations, scoring consequences. Work that is systematic and repeatable. HAZOP Assistant does that part: walk every drawn node, apply the full guideword × parameter matrix, pre-fill every cell, score four severity categories, anchor the safeguards to tags.

What it does not do: chair the session, interpret operating context, weigh trade-offs, or sign off on the action register. That stays with the team in the room.

Nusret Furkan
Co-Founder, ProcessEngineer.io

Frequently Asked Questions

PDF and PNG. One P&ID page per upload. The initiator renders the page at high resolution and runs the full guideword × parameter matrix in a single call.

6–12 nodes per drawing, depending on complexity. Each major piece of equipment — compressor train, heat exchanger, separator, reactor, column, header — is treated as a node. The node count and list are reported at the top of the output.

No/None, More, Less, As Well As, Part Of, Reverse, Other Than — the full IEC 61882 guideword set. Custom guideword sets or project-specific additions can be configured per study.

Flow, pressure, temperature, level, composition, reaction, utilities — plus any process-specific parameters added during configuration. Guideword × parameter combinations that are physically implausible for the node type are flagged as N/A, not silently dropped.

Safety, environment, asset, and production — each scored independently. A deviation that is low safety risk but high production risk gets the right score in each column, allowing the study leader to filter by audience.

The demo uses a 4-category 3-level matrix (people / asset / environment / reputation × high / medium / low). For your study, you upload your corporate risk matrix and the tool scores against it. Severity anchors, likelihood definitions, and risk-rank colouring all follow your matrix, not ours.

A node × guideword matrix coloured by deviation count. High-activity cells show which node–guideword combinations generated the most rows. Low-confidence cells are flagged. The study leader uses it to decide where to spend session time and where the tool's output can stand as-is.

Standard HAZOP worksheet columns: Node / Item / Guideword / Parameter / Deviation / Causes / Consequences / Safeguards / Severity (4-category) / Actions. Formatted to import directly into common study templates without reformatting.

Isolated session per upload. Drawings are not used for model training. Files are deleted after the worksheet is delivered. No third-party access.

See the Worksheet on Your Own Drawings

Two ways in. Send 1 P&ID page and we email you a sample HAZOP worksheet within 24h, no call required. Or book a 30-minute call and we run it through the system live.

Book intro call Try with your drawing, 24h turnaround

Or watch the interactive demo →