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– INNOVATE ENGINEER

Know what to do next with your product idea.

You’ve got an idea you believe in. The Free Sprint turns it into two things you can use straight away: a Specification you can hand to any engineer, and a Viability Report covering market potential, opportunities, challenges, timeline and cost. 60 to 120 minutes. You decide what to do next.

Start the free sprint → CUSTOM GPT · BUILT BY CAST IRON CAD · NO SIGN-UP · NO PAYMENT
Concept to product: sketch, technical drawing, CAD wireframe, final render
– 01

Built for people with an idea they believe in.

FIT · WHO THIS IS FOR

Most product ideas stall in the gap between “I have an idea” and “I know what to build”. Weeks of research, conflicting advice, and expensive early decisions that turn out wrong. The Free Sprint compresses that into 60 to 120 minutes.

It uses the same structure a working engineer would apply in a paid consultation, scripted and reviewed against real manufacturing constraints. The output is yours, and it’s portable – take it to us, to an independent engineering or design practice, or sit with it.

01

Founders – you need defensible answers before raising, committing to tooling, or briefing a team. The sprint gives you a Specification and a Viability Report you can actually show people.

02

Inventors – you’ve got something that works on the bench, or in your head. The sprint tells you what it would take to turn it into something buildable and commercial, without being sold to.

03

Pre-launch creators – you’re close to a campaign or investor date and need scope, cost, and timeline to hold up under scrutiny. The sprint sharpens all three.

– 02

One continuous path. Two phases.

FRAMEWORK · WHERE WE WORK
IE 10-stage framework: Double Diamond: Discover, Define, Develop, Deliver
PROC · IE 10-STAGE FRAMEWORK
Stages 01–05 · First DiamondDiscover & define the right thing Stages 06–10 · Second DiamondDesign, engineer, deliver

The Free Sprint is the first pass through the early stages (sub-activity 01.04) and produces the Specification and Viability Report. The full 10-stage framework, what happens at each stage, and where AI stops and people start is on the How It Works page.

– 03

Four packages. Start free. Go deeper only when it earns its keep.

PACKAGES · FIXED FEE
TIER 01
Self-Serve

Free Sprint

£0
AI-guided · 60–120 min · now

Structured first pass. Outputs two portable documents: a Specification (the source of truth for the idea) and a Viability Report. You decide viability from the pair.

  • Specification – structured, prioritised product requirements
  • Viability Report with brief summary, market potential read, opportunities and challenges
  • Timeline estimate and potential cost bands
  • Yours to keep – portable to any engineer or practice
Start Free Sprint →
TIER 02 · MOST POPULAR
Human Review

Engineer-Verified Review

£129
Human review · 30-min video · after sprint

AI over-extrapolates development options. This tier is the refinement step: an engineer sense-checks the Specification and Viability Report against real engineering and manufacturing constraints.

  • Everything in Free Sprint, plus
  • 30-minute engineer video review
  • Sense check of the Specification
  • Refined viability read with realistic development routes
Book Engineer Review →
TIER 03
Document Package

Expanded Specification

£399
Document package · 5 working days · after review

Free Sprint output reproduced into a well-presented Specification sheet alongside a more complete review. Collated into documents ready to send to engineering practices for review or quotation.

  • Everything in Engineer-Verified Review, plus
  • Branded, well-presented Specification sheet
  • Expanded review and prioritised requirements
  • Portable document pack – for any practice, not just ours
Get Expanded Spec →
TIER 04
Project Estimate

Handover-Ready Package

£699
1-hour consultation · CIC project estimate · by appointment

The next level. A 1-hour consultation with an engineer, resulting in a project estimate produced by Cast Iron CAD, with a timeline based on the agreed specification.

  • Everything in Expanded Specification, plus
  • 1-hour consultation with an engineer
  • Cast Iron CAD project estimate
  • Timeline against the agreed specification
Book Handover →

ALL PAID PRICES INC. VAT · FIXED FEE · NO SCOPE SURPRISES

– 04

What you walk away with.

OUTCOME · WHAT YOU KEEP
OUTPUT · SPECIFICATION

The source of truth for the idea.

  • Product concept statement
  • Prioritised requirements (must / should / could)
  • Structured product specification
  • Portable – hand it to any engineer or practice
→
OUTPUT · VIABILITY REPORT

Direction, not a verdict.

  • Brief summary and spec summary
  • Market potential read
  • Opportunities and challenges
  • Timeline estimate and potential cost bands
– 05

Engineered by the team behind 280+ products.

AUTHORITY · 280+ PRODUCTS · 15 YEARS
Consumer product: Tabtime medication organiser
Industrial plant: transparent-housing production rig
Bespoke build: ruggedised PCB-in-case electronics assembly

Cast Iron CAD has engineered over 280 products across 15 years. Consumer goods, industrial plant, bespoke builds – products in people’s homes and on factory floors today.

Innovate Engineer distils that methodology into structured tools, so the same discipline is available without a paid consultation. The sprint is the same conversation we would run, scripted by experienced engineers and reviewed against real manufacturing constraints.

280+

Products engineered – across consumer, industrial, and bespoke sectors. See the story.

15

Years of delivery – the methodology the sprint runs on is distilled from real project work, not theory.

10

Stage framework – every engagement sits somewhere on the same map. See the stages.

– 06

Questions people ask before starting.

FAQ · BEFORE YOU START
IS IT REALLY FREE?

Yes. No payment, no sign-up, no lead-nurture sequence. If you want a human to review the output with you, that is the £129 Engineer-Verified Review – separately, only if you want it.

HOW LONG?

A full, considered run takes 60 to 120 minutes depending on how much you bring and how deep you want to go. The first structured summary inside the GPT appears in around 15 minutes – that is a checkpoint, not the finished output.

WHO IS IT FOR?

Founders, inventors, and pre-launch creators with an early-stage physical product idea. Not apps. Not services. Things that get made, packed, and shipped.

WHO SEES MY IDEA?

Your session runs inside a custom GPT on your own ChatGPT account. We don’t see or review individual sessions. If you book the Engineer-Verified Review, you choose what to share and when.

HOW ACCURATE?

The sprint returns confidence-rated ranges, not single figures. Directionally useful for shaping the next decision. The paid Engineer-Verified Review narrows them using real manufacturing data.

WHAT IF IT FAILS?

That is the point. Finding out early, before you spend on CAD or tooling, is the win. You keep the Specification and Viability Report either way and can come back when the idea matures.

NOTE · NO COMMITMENT

If it’s not for you, close the tab.

No payment. No sign-up. No sales call. Keep whatever’s useful, come back when the idea matures. Nothing to cancel, nothing to undo.

Start the free sprint → Or see all four packages →
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