What Tuu measures.

Tuu measures operational performance only.

The scored layer is built from monthly raw operational inputs, then converted into rolling annualised KPIs and weighted sub-scores. Policy declarations, narrative claims and self-assessed indicators do not form part of the score.

This is intentional. The aim is to produce a more defensible performance record for procurement, owner reporting, lender review, disclosure and audit-related use.

All three tracks share the same eight scored KPIs:

Energy Intensity
Rolling annualised total energy use, normalised by built-up area.

Water Intensity
Rolling annualised total water use, normalised by built-up area.

Waste Intensity
Rolling annualised total waste generation, normalised by built-up area.

Food Waste Ratio
Rolling annualised food waste as a share of food purchased.

Renewable Energy Share
Rolling annualised renewable energy as a share of total energy use.

Waste Diversion Rate
Rolling annualised diverted waste as a share of total waste.

Recycled or Reused Water Share
Rolling annualised recycled or reused water as a share of total water use.

Training per FTE
Rolling annualised training hours divided by average full-time equivalent headcount.

One shared operational dataset.

Tuu Verified operates on one shared operational dataset across Hotels, Events and ISO 20121.

The core scoring logic, benchmark treatment and verification method are common across the system. Track-level differences sit in cadence, supporting documents, output context and external framework alignment, rather than in separate scored architectures.

The underlying input structure is organised monthly and covers five operational areas:

Energy
Purchased electricity, renewable energy and relevant fuels converted to kWh before entry.

Water
Total water use and recycled or reused water.

Waste
Total waste and diverted waste.

Food
Food purchased and food waste.

People
Training hours and full-time equivalent headcount.

Built-up area is the fixed denominator used for area-normalised KPIs unless a controlled update is issued.

How calculations work.

All scored data enters the system as monthly raw operational inputs.

From that point, Tuu applies a rolling annualised calculation method from the first month onward. The system does not wait for a full twelve months before producing a comparable result. Instead, it annualises available monthly history until a full rolling year is established.

The purpose is to reduce seasonality distortion, limit timing manipulation and produce more stable performance curves over time.

Intensity KPIs are calculated from rolling annualised totals divided by built-up area. Share KPIs are calculated from rolling annualised subset totals divided by their rolling annualised parent totals. Training per FTE is calculated from rolling annualised training hours divided by rolling average FTE.

The overall score is the weighted sum of the eight KPI sub-scores. Tuu does not apply policy modifiers, narrative overlays or internal carbon calculations to alter that result.

How scoring works.

Each KPI is scored against a benchmark corridor.

For some KPIs, lower values are better. This applies to Energy Intensity, Water Intensity, Waste Intensity and Food Waste Ratio.

For others, higher values are better. This applies to Renewable Energy Share, Waste Diversion Rate, Recycled or Reused Water Share and Training per FTE.

A score of 100 is reserved for performance at or near the leading edge of credible operational practice for that metric. It does not represent an industry average. A score of 0 does not imply non-compliance. It identifies performance at or beyond the weak end of the benchmark corridor used for that KPI.

The overall score is operational and numerical throughout. It is designed to reflect measured performance, not declared ambition.

Benchmark source basis.

Tuu’s benchmark corridors are informed by a combination of hospitality-specific operational datasets, engineering reference frameworks, sector guidance and management-system standards, including the Cornell Hotel Sustainability Benchmarking Index, the Sustainable Hospitality Alliance, ISO 14001 and ISO 20121.

The aim is to ground benchmark treatment in observed operational performance and credible technical context, rather than arbitrary thresholds.

Energy Intensity
Informed by hotel operational datasets and building-performance reference frameworks, including the Cornell Hotel Sustainability Benchmarking Index, ANSI/ASHRAE/IES Standard 100, CIBSE TM46 and the U.S. Department of Energy’s Commercial Reference Buildings large-hotel modelling datasets.

Renewable Energy Share
Informed by observed hotel-sector adoption patterns and decarbonisation guidance, including the Green Lodging Trends Report 2024 and the Net Zero Methodology for Hotels.

Water Intensity
Informed by the U.S. EPA’s Water Use Intensity framework, the Cornell Hotel Sustainability Benchmarking Index, the Hotel Water Measurement Initiative and wider hotel-sector guidance such as Water Stewardship for Hotel Companies.

Recycled or Reused Water Share
Informed by hotel water stewardship and water-reuse guidance, including Water Stewardship for Hotel Companies, the European Commission’s Water Reuse guidance and practical sector resources on rainwater and grey water recycling.

Waste Intensity
Informed by the Hotel Waste Measurement Methodology, with hospitality waste studies and tourism waste-management guidance used as secondary reference context.

Food Waste Ratio
Informed by WRAP’s Guardians of Grub programme, the UNEP Food Waste Index Report 2024 and related hospitality food-service research and practice guidance.

Waste Diversion Rate
Informed by the Hotel Waste Measurement Methodology and the European Commission’s Best Environmental Management Practice in the Tourism Sector.

Training per FTE
Informed by management-system competence and awareness expectations, including ISO 14001 and ISO 20121 , translated into a measurable operational signal.

These sources do not produce a single universal benchmark for every geography, hotel class or asset type. They provide the empirical and technical basis for a corridor-based scoring model designed for operational comparison.

Evidence and verification.

Every monthly numeric input that feeds a scored KPI must be traceable to a primary source record or controlled aggregate.

Typical examples include utility bills, invoices, meter logs, haulier or weighbridge records, training logs, payroll records and other operational source documents relevant to the reporting period.

Supporting documents also matter, but they do a different job. They help define scope, support framework mapping and assist documentary review. They do not change KPI calculations.

Tuu applies hard integrity rules to the dataset. Subset values cannot exceed their parent totals. Unsupported numeric inputs cannot form part of a verified cycle. Corrections must be version-flagged and fully traceable.

Independent verification by HLB International.

HLB International acts as the independent verification partner across all Tuu Verified tracks.

Its review covers four core areas:

Validation review
Checking monthly inputs against system rules and internal logic.

Evidence review
Assessing completeness, correctness, authenticity and period coverage.

Traceability testing
Confirming that each scored KPI can be followed from score output to rolling KPI value, to monthly input, to source evidence.

Calculation review
Reviewing KPI values, benchmark interpolation, scoring logic and display behaviour.

Each completed cycle produces a time-stamped verification record with a unique reference, a Smart Badge ID, the verified KPI dataset and the composite score for that reporting period.

How the tracks differ.

All three tracks use the same scored KPI backbone. They differ in cadence, supporting documents, documentary overlays and external framework alignment.

Tuu Verified | Hotels
Biannual verification for accommodation assets that need independently reviewed operational performance records for owner reporting, lender review and platform disclosure.

Tuu Verified | Events
Quarterly verification for venues and organisers, combining the common KPI layer with event-specific scope records and supporting documents for procurement and client review.

Tuu Verified | ISO 20121
Quarterly verification within an ISO 20121 readiness context, combining the common KPI layer with clause-referenced supporting documents, scope controls and readiness artefacts. It supports certification readiness, but does not issue certification or assert conformity.

Historical integrity and version control.

All KPI definitions, formulas, benchmark corridors, weights and validation rules are version-controlled.

When methodology changes, a new framework version is created. Historical scores are not retroactively altered. Each verification cycle produces an immutable, time-stamped dataset and reference ID, preserving continuity for audit, procurement, lender review and longitudinal analysis.

This matters because verified performance records are only useful if historical integrity is preserved.

In summary…

Tuu Verified is built around one shared operational measurement and verification system.

It scores numerical monthly performance data, reviews that data against primary evidence, applies benchmark corridors grounded in sector and technical reference material, and produces a time-stamped record that can be used across procurement, reporting, disclosure and audit-related workflows.

It is designed to measure operational performance clearly and consistently. It is not designed to reward narrative claims, policy intent or symbolic sustainability positioning.