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Free AI-guided viability assessment

Know what to do next with your product idea

Our Viability Sprint gives you a structured specification, realistic timeline, and indicative costs in around 2 hours. Stop guessing. Start building with confidence.

What you’ll walk away with
Product Specification
Development-ready brief for your idea
Realistic Timeline
Confidence-rated development stages
Indicative Costs
Budget ranges you can plan around
Risk Assessment
What could go wrong and how to mitigate it
Clear Next Steps
Clear direction on what to do next
Completed in around 2 hours — AI-guided, at your pace

Most product ideas don’t fail because they’re bad

They fail because nobody knew what to do next. Without a clear plan, this is what happens:

Thousands wasted on unvalidated ideas

Tooling, prototypes, development time — all spent before anyone checked whether the product was commercially viable. A £49 review could help avoid costly development mistakes.

Months of spinning your wheels

Researching endlessly, asking the wrong people, second-guessing every decision. The longer you wait, the further behind you fall.

Someone else gets there first

While you’re figuring out where to start, someone with the same idea but a clearer plan is already building it. Speed matters.

Everything you need to move forward with confidence

The Viability Sprint delivers what no other tool or service can — all in a single engagement.

De-risk before you spend

Find out if your idea works before committing capital. The sprint identifies viability issues, market risks, and technical challenges early — when they’re cheap to fix.

Spec, timeline, and costs in one go

No competitor delivers all three in a single engagement. Walk away with confidence-rated estimates — transparent about what’s validated vs. indicative.

Investor-ready documentation

Sprint output structured to support pitch decks, grant applications, and crowdfunding campaigns. The documentation funders expect to see.

Three steps from idea to action

No jargon, no complexity. Just a clear path from “I have an idea” to “I know what to do next.”

1

Take the Free Viability Sprint

Free — AI-guided

Answer structured questions about your idea. The AI walks you through market research, competitor analysis, specification, and feasibility — all in around 2 hours, at your pace.

2

Get an Expert Review

£49 — human sanity-check

A real engineer reviews your sprint output. You get refined cost estimates, risk flags, and a clear recommendation on whether to proceed. If you don’t get a clear next step, we refund it.

3

Get Your Specification

From £149 — professional documents

Your validated idea turned into a branded product specification, MoSCoW requirements, and design brief — ready for investors, manufacturers, or our engineering team at Cast Iron CAD when you’re ready to build.

Built by the team behind 280+* real products

This isn’t an AI experiment. The Viability Sprint framework was distilled from decades of real engineering and manufacturing projects at Cast Iron CAD — from medical devices to consumer electronics, industrial machinery to garden products.

We’ve seen hundreds of inventors stuck at exactly the point you’re at now. That’s why we built the tool we wished existed: structured, honest, and designed to get you from “I have an idea” to “I know what to do next” as fast as possible.

280+*
Products delivered
40+
Years engineering
10
Stage framework
“After years of being asked the same questions by inventors — ‘Is my idea any good?’, ‘How much will it cost?’, ‘Where do I even start?’ — I realised the answer wasn’t a meeting. It was a system. The Viability Sprint is that system.”
Dave Lock, Technical Director — Cast Iron CAD & Innovate.Engineer
Previously: BP, Caterpillar, Mercedes, Deloitte

From stuck to clear in around 2 hours

Before the Sprint

“I don’t know if my idea is even viable”
“I have no idea what this will cost”
“I don’t know who to trust”
“I’ve been going round in circles for months”
“I’m afraid of wasting money”

After the Sprint

“I have a validated specification document”
“I know the budget range and timeline”
“I’ve been guided by a 280-product framework”
“I have a clear action plan with defined next steps”
“I made an informed decision before spending thousands”

Simple, transparent pricing

Start free. Pay only when you want expert human input.

Free Sprint
£0
AI-guided viability assessment. Self-serve, at your pace.
  • Full 6-stage Viability Sprint
  • Product specification output
  • Indicative timeline & costs
  • Risk assessment
  • Recommended next steps
Start Free Sprint
Spec Package
£149
Full branded specification document. Investor and manufacturer ready.
  • Everything in Expert Review
  • Branded product specification
  • MoSCoW requirements doc
  • Design brief
  • Investor-ready format
Get Spec Package
Premium Consultation
£299
Specialist engineer + custom roadmap. Full strategic session.
  • Everything in Spec Package
  • 1-hour specialist consultation
  • Custom development roadmap
  • Manufacturing strategy
  • Direct CIC team introduction
Book Consultation

Not ready to sprint yet?

Download our free Product Starter Guide — a practical checklist for anyone with a product idea, covering the first steps most people miss.

Your idea deserves a clear path forward

Stop guessing. Find out if your product idea is viable — and what to do next.

Start Your Free Viability Sprint

*Based on product concepts assessed across Cast Iron CAD and Innovate Engineer projects since 2018.