01
People
A website should be usable by everyone.
- Accessibility
- Usability
- Readability
- Mobile experience
- Data efficiency
- Page speed
Engineering methodology
How Human Impact Measures Better Websites
Human Impact Certified evaluates websites using an evidence-based engineering methodology that measures the real-world impact of digital experiences.
Rather than relying on a single performance metric, the Human Impact Score is calculated across five independent pillars that together represent the quality, responsibility and effectiveness of a modern website.
Why Human Impact exists
Every website has consequences.
For more than two decades, websites have been measured using isolated technical metrics. Performance tools measure speed. Accessibility tools evaluate usability. Search tools analyse visibility. Carbon calculators estimate environmental impact. AI systems increasingly interpret websites in entirely different ways.
While each measurement provides valuable insight, none describes the complete impact a website has on people, businesses, the environment or artificial intelligence.
Human Impact Certified was created to unify these measurements into a single engineering methodology that enables organisations to understand, compare and continuously improve the overall impact of their websites.
Engineering philosophy
Better measurement leads to better engineering.
Engineering begins with observation.
Meaningful improvement is only possible when outcomes can be measured objectively, consistently and transparently.
Human Impact Certified applies this philosophy to websites by evaluating measurable engineering decisions rather than subjective design preferences or marketing claims.
Every Human Impact Score is derived from evidence. Never opinion.
The standard
The five engineering pillars.
Each pillar measures a different consequence of website engineering.
02
Planet
Every digital interaction consumes energy.
- Page weight
- Data transfer
- Carbon emissions
- Electricity usage
- Caching efficiency
- Resource optimisation
03
AI
Modern websites are increasingly consumed by machines before people.
- Semantic HTML
- Structured data
- Entity clarity
- Information architecture
- Machine readability
- Content structure
04
Engineering
Quality software produces better digital experiences.
- Core Web Vitals
- Security
- Maintainability
- Performance
- Code quality
- Technical resilience
05
Trust
Trust is engineered.
- Privacy
- Transparency
- Credibility
- Technical integrity
- Responsible implementation
- Evidence-based practices
Independent scoring
Strength in one discipline should never conceal weakness in another.
Each engineering pillar is measured independently because excellence in one discipline should never conceal weakness in another.
A website may achieve outstanding performance while remaining inaccessible to some users, environmentally inefficient or difficult for AI systems to understand.
Independent scoring provides greater transparency, encourages balanced engineering decisions and helps organisations identify meaningful opportunities for improvement.
Evidence-based assessment
Every score must be explainable.
Human Impact Certified combines evidence from multiple engineering disciplines.
Core Web VitalsLighthouse auditsAccessibility testingCarbon estimationHTML validationCSS validationStructured data analysisSemantic analysisMetadata qualityResource efficiencyPerformance benchmarking
No single metric determines the overall Human Impact Score. Every assessment reflects the combined outcomes of measurable engineering decisions.
Continuous improvement
Certification is not intended to represent perfection.
It represents measurable progress.
As websites evolve, technologies improve and standards advance, reassessment enables organisations to continuously improve the impact of their digital experiences.
Human Impact Certified therefore encourages ongoing measurement, refinement and engineering excellence rather than one-time optimisation.
Reference framework
Built on recognised technical standards.
The methodology is informed by established web, accessibility, performance, semantic and environmental frameworks.
- World Wide Web Consortium
- Web Content Accessibility Guidelines
- Core Web Vitals
- Lighthouse
- Schema.org
- HTTP Archive
- WHATWG HTML Standard
- Recognised digital carbon methodologies
The complete technical specification, scoring logic and source references will be published as the Human Impact methodology develops.
Measure what matters