Revision comparison and consistency
Compare incoming revisions with accepted project values and focus review on what actually changed.
CHANGES · CONFLICTS · IMPACTFor process & safety engineering teams
Every value.
In one connected graph.
Plexus extracts values from your registers, datasheets and P&IDs and traces each one to its source. Calculations, revision checks and safety work run on the same data. Nothing enters the project record until an engineer approves it.
Inside Plexus
The project state,
at a glance.
Open conflicts by severity, registered objects, documents and import batches. Behind every number sits the record and the evidence that produced it.
The production interface evolves and may differ in detail.
Connected engineering workflows
The graph is context.
Engineering work is the outcome.
P&ID extraction and review
Turn drawing content into clearly labeled candidates, then review each item with its drawing evidence in view.
CANDIDATES · EVIDENCE · REVIEWEngineering calculations
Run calculations on source-traced inputs and keep assumptions, design criteria and results in the project record.
INPUTS · BASIS · RESULTSSafety work and decisions
Keep HAZOP actions, assumptions, decisions, owners and closure evidence connected to affected objects.
HAZOP · ACTIONS · ASSUMPTIONSProcurement and vendor comparison
Build RFQ packages from approved project requirements and compare vendor bids against the same basis.
RFQ · BIDS · VENDOR DATAHistorical project views
Reconstruct what was approved at a date, revision or frozen milestone without overwriting later history.
AS-OF · MILESTONES · HISTORYDifferent tasks,
the same project graph.
Each module does one engineering job. Use one, combine several or run them all on the same connected project graph.
P&IDs reviewed at the level of design decisions
The drawing itself is reviewed the way a senior process engineer reviews it: equipment choices, protections and connections checked against typicals, the project knowledge base and good engineering practice. Tag extraction runs alongside, turning drawing content into clearly labeled candidates.
- Engineering review with the project knowledge base in mind.
- Every finding pinned to the exact drawing location it covers.
- Findings and candidates stay proposals until an engineer approves them.
- Tags like P-101 and lines like 40-P-1204 extracted and matched to the registers they belong in.
Nothing enters the project record without a review decision.
Run the savings math on your own numbers.
Defaults describe a typical FEED scope. Every figure recomputes from the inputs you set.
490 hsaved per review package
€41,650estimated cost savings
- Baseline effort
- 1,400 manhours
- Reduction rate
- 35%
- Hours saved
- 490 manhours
- At €85/hr
- €41,650
88 hsaved per HAZID study
€8,379estimated cost savings
- Baseline effort
- 252 manhours
- Reduction rate
- 35%
- Hours saved
- 88 manhours
- At €95/hr
- €8,379
110 hsaved per HAZOP study
€10,474estimated cost savings
- Baseline effort
- 315 manhours
- Reduction rate
- 35%
- Hours saved
- 110 manhours
- At €95/hr
- €10,474
385 hsaved per project
€34,650estimated cost savings
- Baseline effort
- 700 manhours
- Reduction rate
- 55%
- Hours saved
- 385 manhours
- At €90/hr
- €34,650
Assumption-based estimates; the P&ID review reduction rate reflects early pilot experience. Actual values are determined per project.
How Plexus works
From scattered sources to
verified engineering data.
Plexus turns registers, P&IDs and datasheets into connected, source-traced engineering data: conflicts surfaced, calculations run and every value approved by your engineers before it counts.
01Import project sources
P&IDs, Excel/CSV registers, datasheets, vendor documents and lessons learnt from previous projects come in as source artifacts. Nothing is re-typed.
02Connect to the graph
Tag and unit normalization matches every value to the objects already in the project graph, with provenance attached.
03Surface conflicts
Consistency checks flag disagreements between sources, with severity, status and the evidence behind each flag.
04Run engineering calculations
Sizing, comparisons and datasheet generation draw their inputs from the graph. Assumptions and results stay in the record.
05Engineer review gate
Bulk triage with authority checks. Candidate values stay candidate until an engineer approves them. Safety closures require the Safety Lead.
06Versioned and traceable
Approved values keep their evidence and full history. View the graph as of any date, revision or milestone.
The cost of consistency
Every revision brings
the same work back.
A source changes. Formats drift. One discipline moves ahead while another works from stale values. Engineers rebuild the comparison by hand. Everything you just saw turns that repeated rebuild into an evidence-backed review.
Trust and engineering authority
Automation that stops at
the engineering decision.
Plexus can extract, compare, flag, draft and recommend. It does not make engineering decisions on its own.
Engineer approval
Extracted values stay marked as candidates until an engineer with review authority approves them.
Source evidence
Every proposed value links back to the exact place in the source document that supports it.
Version history
Changes and review decisions are versioned. View the project as it stood at any revision, date or milestone.
Data isolation
Each client's project data is isolated at the database layer with Row Level Security.
EU data residency
European data centers are the default for hosting and processing. We select third-party services for EU hosting and GDPR compliance.
Provider disclosure
Before a deployment processes project information, we document which tools, models and infrastructure it uses, where data flows and what controls apply.
Questions engineering teams ask
Clear boundaries build
useful engineering software.
Honest constraints up front. Easier than discovering them three months in.
Can Plexus reliably read every drawing?
No. Extraction produces candidates, each carrying the drawing evidence behind it; a value without evidence is not accepted. Engineers review every candidate against its source. Where the source gives no defensible value, the field stays empty and flagged.
Does Plexus approve engineering values?
No. Plexus prepares comparisons, evidence and proposed changes. Project roles and review rules determine who can approve them.
Which project sources are supported?
Plexus works with structured registers and tag lists, P&IDs, datasheets, specifications, calculations and vendor documents.
Which drawing formats can Plexus read?
P&IDs come in as PDF or DWG. Extraction from drawings is candidate-only regardless of format: every extracted value waits for engineer review.
Does Plexus replace our existing engineering tools?
No. Your team keeps producing registers, datasheets and drawings in the tools they already use. Plexus works on those outputs and keeps them consistent, reviewed and traceable.
Does Plexus capture lessons learnt?
Yes. Review decisions, resolved conflicts, assumptions and calculation bases stay versioned in the project record, so the next revision and the next project start from what was already learnt instead of from scratch.
Does Plexus depend on one AI provider?
No. Provider selection is abstracted, so each deployment can choose the AI models it uses without tying the project to one vendor.
Is project information used to train models?
No. Plexus does not train models on your project data. The data-processing terms of the providers enabled for a deployment are documented before project information is processed.
How is project information isolated?
Project data is private and isolated per client. Database access is enforced with project membership and Row Level Security.
Who builds Plexus
Plexus is built by two process engineers, close to 30 years of project work between us. Every workflow in the product is something we have done by hand, revision after revision. We build the software we wished we had on those projects.
Getting started
A pilot on your project,
then you decide.
Plexus starts as a bounded pilot on your own project data, reviewed by your own engineers. Four steps from first call to a rollout decision.
- Step 1
Intro call
A short call on your situation and which of your workflows Plexus can shorten. We agree the pilot scope: one project, a bounded set of documents.
- Step 2
Pilot run
We load the agreed documents into an isolated workspace and generate the deliverables.
- Step 3
Review with your engineers
Your engineers review what came out: flagged conflicts, the evidence behind each value, calculation results. They judge it against the original documents.
- Step 4
Rollout decision
You decide whether to expand to more documents and projects or stop there. The pilot findings are yours either way.
It starts with a short call.