# Review against a named standard (Lab)

> In our lab, an AI agent checked a play tower against BS EN 71-8 and Eurocode 5, redesigned it, and checked the new model again.

Status: Lab · Canonical: https://paracrux.com/docs/lab/review-against-a-standard

Lab: shown in demos and case studies, not for sale. This page describes what we are building, not something you can buy.

## What we are building

- It reads the model from a copy, never the original, and measures every body. On the play tower it also found 30 overlapping solids where joints had never been modelled.
- It checks the model against rules from a named standard. Each rule carries its clause and says where its limit came from: the current edition, an older text, or engineering judgement.
- It runs hand calculations with every load's source listed: 18 Eurocode 5 checks with the UK National Annex on the play tower.
- It remodels as a new file, deriving each new dimension from a rule limit, then checks the new model, not its own proposal.
- It writes it up: a GA drawing, STEP file, cut list and hashed manifest for each design, and a report comparing them. On the play tower, 19 failures became 0, with 14 items left to verify.

## See it

- Recording: [Play tower: review, redesign and re-check](https://paracrux.com/case-studies/play-tower#recording) (LAB CASE STUDY · 29 SEP 2026)
- [The play tower case study](https://paracrux.com/case-studies/play-tower)

## What it is not, yet

- Design review is not in the Agent you can buy.
- Prepared, not certified. Every output says it was prepared by an AI agent and has not been checked. A competent person must verify it before anything is made or sold.
- What the model cannot show stays "verify", never "pass": fasteners, timber treatment, warning labels, rope specification, anchor pull-out and bolted joints, on the play tower.
- A rule that quotes an older edition is marked superseded until someone checks it against a licensed copy of the current one.
- The review was run by an AI agent driving SOLIDWORKS through its API in our lab, which is not how the shipping Agent works.

## What you can do today

- [Ask about the open model](https://paracrux.com/docs/ask-about-your-model.md) (Available): Ask a question in plain English and the Agent reads the answer from the model open in SOLIDWORKS. Reading never changes anything.
- [Write design intent and instructions](https://paracrux.com/docs/write-design-intent.md) (Available): Tell the Agent what must change, what must stay true and how you want it to work. It keeps both up to date as you talk.

## Covers

- Review against a standard (Lab): Check a design against a named standard, redesign, and check again. Prepared, not certified.