Green IT / Sustainable Technology Maturity Assessment

About this model

About this assessment

About the Green IT / Sustainable Technology maturity model

The technology industry accounts for a significant and growing share of global energy consumption, carbon emissions, electronic waste, and water usage. Yet most organisations have no visibility of the environmental footprint of their IT operations, let alone a plan to reduce it. This model exists to change that.

Green IT maturity is not about performative gestures or purchasing carbon offsets to make a problem disappear. It is about understanding the real environmental cost of technology decisions — from the energy consumed by a data centre to the rare earth minerals in a discarded laptop — and systematically reducing that cost through better design, smarter procurement, longer hardware lifecycles, and honest measurement.

The model treats sustainability as an engineering discipline, not a marketing exercise. Mature organisations do not bolt sustainability onto existing processes as an afterthought; they embed environmental thinking into architecture reviews, procurement decisions, software design, and infrastructure operations. They measure what matters, set science-based targets, and hold themselves accountable with the same rigour they apply to security or financial performance.

This assessment evaluates how well an organisation understands, measures, and reduces the environmental impact of its technology estate. It covers six areas that together represent the full scope of Green IT: from energy and carbon management through hardware lifecycle, cloud efficiency, and sustainable software development, to the measurement practices and strategic commitments that make improvement durable.

The model uses three maturity levels — Unmeasured, Optimising, and Regenerative — that reflect a progression from ignorance and inaction, through deliberate improvement, to systemic integration where sustainability is woven into every technology decision.

There are 24 questions across 6 areas, with 4 questions per area. Each question describes concrete, observable behaviours at each maturity level, making it straightforward to identify where your organisation stands today and what meaningful progress looks like.

Who this assessment is for

This assessment is designed for:

• CIOs, CTOs, and IT Directors who need to understand their technology organisation's environmental footprint and build a credible improvement roadmap.
• Sustainability and ESG leaders who need to extend corporate environmental commitments into IT operations with specific, measurable actions.
• Infrastructure and platform engineers responsible for data centres, cloud environments, and network operations who want to reduce energy consumption and waste.
• Software architects and development leads looking to adopt green software engineering practices and reduce the carbon intensity of applications and pipelines.
• Procurement and vendor management teams seeking to integrate environmental criteria into IT purchasing decisions and supplier relationships.
• IT strategy and governance teams embedding sustainability into decision-making frameworks, architecture standards, and investment processes.

The model is relevant to organisations of any size that operate technology infrastructure, develop software, or consume cloud services — which today means virtually every organisation.

The three maturity levels

Level 1 — Unmeasured

The organisation does not measure, manage, or actively consider the environmental impact of its IT operations. Energy consumption is invisible, hardware is replaced on fixed schedules regardless of condition, cloud resources sprawl unchecked, and software is built without any regard for efficiency or carbon cost. If sustainability is mentioned at all, it is someone else's responsibility — facilities, corporate affairs, or the sustainability team — and IT has no specific targets, no data, and no accountability.

At this level, environmental harm is not intentional; it is simply the result of not paying attention. The organisation may be wasting significant energy and materials without realising it.

Level 2 — Optimising

The organisation has recognised that IT has a material environmental footprint and has begun to measure and reduce it. Key metrics such as energy consumption, carbon emissions, and e-waste volumes are tracked and reported. Hardware replacement considers device condition, not just age. Cloud resources are periodically rightsized. Development teams apply basic efficiency practices. Procurement includes sustainability questions. IT strategy names sustainability as a goal, and at least a few concrete initiatives are underway.

At this level, improvement is real but often concentrated in a few areas or driven by a small number of advocates. Sustainability is a consideration, but not yet a constraint — it can be deprioritised when it conflicts with cost or speed.

Level 3 — Regenerative

Sustainability is a first-class decision criterion in every significant technology choice, with equal standing alongside cost, performance, and security. The organisation tracks comprehensive environmental data in near real time, sets science-based targets broken down to team level, and publishes results externally. Hardware lifecycles are maximised through repair-first policies and modular procurement. Cloud and infrastructure are continuously optimised for carbon efficiency. Software teams apply green engineering practices and measure the carbon cost of their applications. The supply chain is actively managed for environmental responsibility.

At this level, the organisation does not just minimise its own harm — it contributes to industry improvement through transparency, knowledge sharing, and demanding better from its suppliers and partners. The goal shifts from "less bad" to genuinely restorative.

The 6 areas assessed

1. Energy & Carbon Management

This area examines how the organisation tracks, manages, and reduces the energy consumption and carbon emissions generated by its IT infrastructure. It covers energy metering and attribution, carbon footprint calculation across Scope 2 and Scope 3, renewable energy sourcing, and data centre efficiency optimisation. Organisations that score well here know exactly how much energy their IT estate consumes, where that energy comes from, and have credible plans to reduce both consumption and carbon intensity.

2. Hardware Lifecycle & E-Waste

This area assesses how the organisation manages the physical materials that flow through its technology operations. It covers replacement decision-making (condition-based versus calendar-based), end-of-life handling (reuse, donation, certified recycling), repair and refurbishment practices, and e-waste tracking and reporting. Mature organisations treat hardware as a finite resource to be preserved, not a consumable to be discarded.

3. Cloud & Infrastructure Efficiency

This area evaluates how efficiently the organisation uses its cloud services and shared infrastructure. It covers resource utilisation and rightsizing, provider and region selection on sustainability criteria, data lifecycle management to prevent storage waste, and network infrastructure efficiency. The focus is on eliminating the hidden environmental cost of overprovisioned, idle, or poorly managed digital infrastructure.

4. Software & Application Sustainability

This area examines whether environmental impact is considered in how software is designed, built, and operated. It covers energy-efficient coding and architecture, CI/CD pipeline sustainability, the carbon cost of AI and machine learning workloads, and the environmental footprint of websites and digital products. This is the newest frontier of Green IT — recognising that software design choices directly determine how much hardware and energy is needed to deliver a given outcome.

5. Measurement & Reporting

This area assesses whether the organisation can quantify and communicate the environmental impact of its technology operations. It covers overall footprint measurement, target-setting practices, transparency and external reporting, and whether sustainability data actually drives decisions. Without credible measurement, all other green IT efforts remain anecdotal and unaccountable.

6. Strategy, Culture & Procurement

This area evaluates how deeply sustainability is embedded in the strategic direction, organisational culture, and purchasing practices of the IT function. It covers IT strategy alignment, workforce awareness and skills development, procurement criteria, and supply chain engagement. This is the area that determines whether sustainability is a lasting commitment or a passing trend — mature organisations make it structurally impossible to ignore.

How this model relates to other frameworks

• ISO 14001 — Environmental management systems standard applicable to IT operations.
• Green Software Foundation (GSF) Principles — Principles for building carbon-efficient software applications.
• The Green Grid — Industry consortium focused on data centre energy efficiency (PUE, WUE, CUE metrics).
• EPEAT — Environmental rating system for electronic products used in procurement.
• EU Energy Efficiency Directive — Regulatory framework driving data centre and IT energy reporting in Europe.
• Science Based Targets initiative (SBTi) — Framework for setting emissions reduction targets aligned with climate science.
• GHG Protocol — Standard for calculating and reporting greenhouse gas emissions (Scope 1, 2, 3).
• Sustainable Web Design — Community-driven guidelines for reducing the environmental impact of web products.
• R2 / e-Stewards — Certification standards for responsible electronics recycling.

Frequently asked questions