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Maturity Levels

The Health Data Readiness Level (HDRL) Framework uses five levels to describe the current state of maturity of a health data organisation, service, network or system. The levels support evidence review and improvement planning in different national and international settings. In the framework's first application, they were used to examine potential readiness to participate in the emerging UK Health Data Research Service (HDRS).

Maturity is evidence-dependent

Levels describe the evidence available at the assessment date. They are not grades, accreditation decisions or guarantees of delivery. An organisation may have operational capability that is not yet supported by the documentation or measured performance required for a higher level.


Level 1: Initial — Ad-hoc Processes

  • Processes are informal or fragmented
  • Major gaps exist; requirements are not met

Level 2: Developing — Basic Structures

  • A strategy is in place, and initial steps have been taken
  • Implementation is just beginning and not yet widespread

Level 3: Defined — Documented Processes

  • Some progress has been made, and parts of the system are working
  • Targets are set, but not always achieved consistently

Level 4: Managed — Measured Performance

  • Operations are standardised and meet baseline requirements
  • Service Level Agreements (SLAs) are published and met

How to interpret Level 4

In HDRL v1.0.1, Level 4 describes measured and standardised performance. The original project treated it as an aspirational collaboration profile, not as a current HDRS or other programme threshold. Any use of a maturity level as a formal participation gate would require validation and an explicit decision by the relevant programme authority.

Level 5: Optimising — Continuous Improvement

  • The organisation exceeds baseline requirements
  • There is a focus on continuous improvement and top performance
  • Practices are recognised as exemplary

Design Principles

  • Levels can be considered at the aggregate, domain and individual-indicator levels. The pattern across indicators matters: an aggregate result should not conceal a material weakness or evidence gap.
  • Organisations may decide to prioritise some elements of the framework over others according to their role, strategy and operating context, provided the assessment scope and any exclusions remain explicit.
  • The maturity levels an organisation can realistically reach will also be affected by the investment funding available to build and sustain capability.
  • Level 4 thresholds are designed to be ambitious but achievable. They will require validation by comparing with UK and international benchmarks.
  • Levels reflect the current state of capability, from basic to advanced.
  • HDRL is a roadmap tool, not a pass/fail audit. An organisation at Level 2 has a clear path to Level 3 and beyond.
  • The five-level structure is aligned with CMMI nomenclature used across many international maturity frameworks.