TRL
Basic principles observed
CRL
Hypothetical commercial proposition
PRL
Problem practitioner-identified (1-3 practitioners)
TRL
Technology concept formulated
CRL
Commercial proposition formulated
PRL
Sector-wide validation (≥10 practitioners)
TRL
—
CRL
—
PRL
Practitioner commitment secured (≥5 time allocation)
TRL
Experimental proof of concept
CRL
Applied research based on market reality
PRL
Ecosystem stakeholders consulted
TRL
Technology validated in lab
CRL
Small-scale pilot commercially valid
PRL
Tech type classified; ≥70% analogue pilot success
TRL
Technology validated in relevant environment
CRL
Large-scale pilot commercially validated
PRL
Real-world utility demonstrated; measurable impact
TRL
Technology demonstrated in relevant environment
CRL
Commercial trial with repeat customers
PRL
Multi-stakeholder stress test passed; NPS ≥80, TVR ≥10
TRL
System prototype in operational environment
CRL
Commercial launch with market traction
PRL
Documented impact (≥1 case study); champion advocacy
TRL
System complete and qualified
CRL
Scaling product/business
PRL
Sustained adoption (≥100 users, 90% retention, 30% referral)
TRL
System proven in operational environment
CRL
Sustainable business model proven
PRL
Sector standard (≥1 paying customer, community of practice)
PRL 1-3
Core Rule
Never skip a voice
Action
Validate with all 6 stakeholders
Success Signal
5/6 YES → proceed Any NO → pivot or kill
Gate Threshold
≥60/100
PRL 4-6
Core Rule
Test simple before tech
Action
Low-cost pilots (paper/concierge/no-code)
Success Signal
Retention & willingness to pay NPS ≥80, TVR ≥10
Gate Threshold
≥80/100
PRL 7
Core Rule
Co-create, don't dictate
Action
Work shoulder-to-shoulder with practitioners
Success Signal
They use it daily & defend it ≥1 case study
Gate Threshold
≥90/100
PRL 8-9
Core Rule
Share everything
Action
Build in public; publish learnings
Success Signal
Others copy, improve, or join ≥100 users, 90% retention
Gate Threshold
≥90/100 + 7% WoW growth
What They Catch
Adoption barriers; workflow reality; priority signal
When
PRL 1-2
Example Barrier
Won't commit time = not urgent
What They Catch
Budget cycles; approval chains; funding sources
When
PRL 3
Example Barrier
18-month procurement cycle kills runway
What They Catch
TCO; hidden costs; buying process; payment terms
When
PRL 3
Example Barrier
£5K license, £50K integration cost
What They Catch
Compliance costs; approval timelines; liability
When
PRL 3
Example Barrier
MHRA adds 2 years + £500K
What They Catch
Technical feasibility; evidence base; market size
When
PRL 1-4
Example Barrier
Violates fundamental principles
What They Catch
Implementation reality; cost-to-serve; scalability
When
PRL 1-4
Example Barrier
No material exists at that price point
TRL
TRL 1-2
CRL
CRL 1-2
PRL
PRL 1-3
5/6 stakeholder YES or KILL
TRL
TRL 4
CRL
CRL 3-4
PRL
PRL 4
All 3 frameworks or KILL
TRL
TRL 6
CRL
CRL 5
PRL
PRL ≥5
HARD GATE: Cannot proceed if any <threshold
TRL
TRL 7-8
CRL
CRL 6-7
PRL
PRL 7
All 3 frameworks or KILL
TRL
TRL 9
CRL
CRL 8-9
PRL
PRL 8-9
All 3 at level 9 = sustainable success
35%
Measurement
Pre-sale conversion, NPS, switch quotient
Threshold
PRL 1-3: ≥60 PRL 4-6: ≥80 PRL 7-9: ≥90
30%
Measurement
Time saved, error reduction, task completion
Threshold
+7% WoW at PRL 7-9
20%
Measurement
Number, influence, budget commitment
Threshold
≥3 champions at PRL 7
10%
Measurement
LTV:CAC, unit economics
Threshold
Validated by finance
5%
Measurement
Referral velocity, community formation
Threshold
30% referral at PRL 8
"Can we build it?"
Validates
Technical feasibility
Catches Failures
Technical impossibility
Timing
Lab testing (12-18 months)
"Will someone pay?"
Validates
Business viability
Catches Failures
Market/business model
Timing
Market testing (6-12 months)
"Will practitioners use it?"
Validates
End-user adoption + all above
Catches Failures
All failure modes
Timing
Multi-stakeholder review (1-4 weeks)
Timeline
12-18 months
Investment
£500K-£2M
Failure Detection Coverage
Technical issues only
Timeline
18-36 months
Investment
£1M-£3M
Failure Detection Coverage
Technical + commercial (sequential)
Timeline
1-4 weeks
Investment
£10K-£20K
Failure Detection Coverage
All issues (parallel)
Speed: 10-50x faster | Cost: 50-100x cheaper | Coverage: Complete
UK Baseline
13%
FORTRESS + PRL Target
68%
UK Baseline
30%
FORTRESS + PRL Target
88%
UK Baseline
£500K+
FORTRESS + PRL Target
£9K
UK Baseline
1
FORTRESS + PRL Target
10
UK Baseline
N/A
FORTRESS + PRL Target
8 weeks
UK Baseline
70-87%
FORTRESS + PRL Target
<20%