// 00 · INNOVATE ENGINEER
Find out what it’ll take to turn your idea into a product worth making.
Most ideas stall in the gap between concept and product. The Free Sprint gives yours structure, turning it into two quick-draft documents you can build on: a Specification you can hand to any engineer, and a Viability Report covering market potential, opportunities, challenges, timeline and cost. You decide what to do next.
CUSTOM GPT · FOR PHYSICAL PRODUCTS · NO SIGN-UP · NO PAYMENT
Stuck between an idea and a build.
PROBLEM · WHERE IDEAS STALLMost product ideas stall in the gap between “I have an idea” and “I know what to build”. Weeks of research that goes nowhere. Conflicting advice from people with skin in the game. Five-figure prototype costs proving the wrong thing first.
Built for physical products. Things that get made, packed, shipped. Not apps. Not services.
Built by the engineer behind 280+ products.
GUIDE · WHO BUILT THIS · 25 YEARS
Dave Lock has spent over 25 years engineering physical products, at Cast Iron CAD since 2010: consumer goods, industrial plant, bespoke builds. Products in people’s homes and on factory floors today. He also lectures for the Product Design and Engineering courses at the University of Brighton.
Innovate Engineer distils that methodology into structured tools, so the same discipline is available without a paid consultation. The Sprint is the same conversation he’d run in a paid review, scripted and pressure-tested against real manufacturing constraints.
One continuous path. Two phases.
FRAMEWORK · WHERE WE WORK
PROC · IE 10-STAGE FRAMEWORK
The Free Sprint is the first pass through the early stages 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.
Not a scorecard. A structured interrogation.
MECHANISM · WHAT THE GPT DOESFair question if you’re visiting cold: is this just ChatGPT with a prompt template? No. The Sprint runs the same ordered path we use on paid engineering projects, enforces it turn by turn, and won’t let you skip the hard questions.
01 · ASKS
Structured questions through stages 01 to 05.
Problem framing. Customer. Requirements (must, should, could). Concept. Specification. Vague answers get pushed back.
Not: an open-ended chat. Is: a staged interview you can’t short-circuit.
02 · CHECKS
Against the 10-stage framework above.
Your answers are pressure-tested for manufacturability, cost bands, timeline plausibility, and failure patterns from real project work since 2010.
Not: generic internet advice. Is: our methodology, compressed.
03 · DELIVERS
Two portable documents. Yours to keep.
A Specification any engineer can quote against, and a Viability Report showing where the idea is strong, where it’s weak, and what to test next.
Not: a hosted dashboard. Is: copy-ready output you keep, paste into your own docs.
What you walk away with.
OUTCOME · WHAT YOU KEEPOUTPUT · SPECIFICATION
The source of truth for the idea.
- Product concept statement
- Prioritised requirements (must / should / could)
- Structured product specification
- Copy-ready: paste into any brief or deck
OUTPUT · VIABILITY REPORT
Direction, not a verdict.
- Brief summary and spec summary
- Market potential read
- Opportunities and challenges
- Timeline estimate and potential cost bands
Four packages. Start free.
PACKAGES · FIXED FEE-
EXPLORING?
Free Sprint
£0
Costs you nothing and gives you enough to decide whether it’s worth going further.
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DECIDING?
Engineer-Verified Review
£129
A second opinion from a working engineer, before you commit serious time or money.
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PITCHING?
Expanded Specification
£399
A branded document that stands up in front of investors, partners, or boards.
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BUILDING?
Handover-Ready Package
£699
Strategy session, roadmap, and a direct route into Cast Iron CAD for delivery.
ALL PAID PRICES INC. VAT · FIXED FEE · NO SCOPE SURPRISES
Questions people ask before starting.
FAQ · BEFORE YOU STARTIs 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?
About 15 minutes for a complete quick-draft Specification and Viability Report. It’s designed as a first-pass, enough to decide what to refine, what to brief, or whether to move on. Add detail yourself, or hand it to an engineer for the £129 Engineer-Verified Review.
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.