Stage 1
DEMAND
Why & how much work?
D1
Population need
D2
Activity volume
Clinical Service Evaluation System
How many of the services you run could you defend, line by line, if you were asked tomorrow?
For every clinical service your trust, ICB or system commissions or delivers, the same five questions apply. Is it meeting patient need? Is it clinically safe? Are its outcomes acceptable? Is it economically viable? And is it better than the alternatives available across the system? Few organisations can answer all five, for every service, with confidence. Doing so is the foundation of credible service design and reconfiguration, and it is what this system is designed to support.
What it is
Service fragility in the NHS is primarily an operational reality, not a regulatory one. A service can be fully compliant on paper and still be fragile: too small to sustain a safe rota, or quietly drifting on the outcomes that matter while it leans on a workforce that is one resignation away from a gap.
Because fragility can come from any one of many factors, or any combination of them, the system does not collapse to a single score. We assess each service against ten dimensions, organised into four stages: Demand, Inputs, Outputs and Context. From the evidence collected for each dimension we reach a clear conclusion, summarised on a one-page Diagnostic Wheel.
Stage 2
INPUTS
Can it be delivered?
D3
Workforce
D4
Clinical dependencies
D5
Estate, equipment & digital
Stage 3
OUTPUTS
Is what it produces acceptable?
D6
Outcomes, quality & safety
D7
Cost & economic viability
Stage 4
CONTEXT
Does it sit in a viable, resilient system?
D8
Geography & alternative locations
D9
Resilience & concentration
D10
Governance, partners & enablers
How this sits alongside a Clinical Service Review
Where our Clinical Service Review brings objectivity to a single service already in difficulty, the system gives a board a consistent way to test the strength or fragility of every service it runs, before difficulty sets in.
Read about the Clinical Service ReviewQuantitative where possible, qualitative where necessary
The system is more than conceptual. We maintain quantitative models for six of the ten dimensions: Population Need, Activity Volume, Workforce, Clinical Dependencies, Outcomes, Quality and Safety, and Cost and Economic Viability. These draw on published Royal College, NHS England, NICE and GIRFT guidance, with calibrated proxies for use when service-specific data is not available. You can also explore our interactive Clinical Co-Dependencies model, backed by national and regional guidance, directly online. The remaining four dimensions combine quantitative inputs with structured qualitative assessment.
How to read this wheel
Status·by ring distance
Fragilecentre · below threshold
Watchmiddle · vulnerable
Strongrim · above the threshold
Evidence·by spoke style
Canonical
source-cited indicator or quantitative measure
Proxy
e.g. volume- or cost-based proxy rule
Gap
missing/incomplete data, flagged for review
Illustrative reading
ServiceCardiology
SiteSite A
Binding constraints
Watch list
When to use it
The system earns its place when a board is weighing service-level decisions. It gives a consistent, evidence-based read in moments where judgement is exposed and the cost of getting it wrong is high.
Reconfiguration and centralisation
Can we sustain three of these across the footprint, or do we centralise?
When several sites carry the same weakness and consolidation is on the table.
Network design
Who carries what across this network?
When a system inherits a mosaic of services and has to design the connections.
Succession planning for sub-scale services
Who runs this service in two years?
When the workforce cannot be replaced like-for-like and time is shorter than it looks.
Capital prioritisation
Which service does the next £20 million actually rescue?
When the case for spend has to map to the binding constraint, not the loudest voice.
Response to CQC or regulatory concern
What's actually driving the rating, and what changes it?
When the symptom is in the report but the cause sits somewhere else on the wheel.
The spine of a wider clinical strategy
What's load-bearing across the portfolio, and what's drifting?
When the question isn't about one service but the whole portfolio.
Each signature shows the kind of wheel pattern that typically triggers this decision. Illustrative.
How it compares
Boards already use four layers to judge a service, and each answers only part of the question.
| Approach | Primary question it answers | Unit of analysis | Spans demand to context? | What you get | Cadence |
|---|---|---|---|---|---|
| Clinical Service Evaluation System Strasys | Is this service meeting need, safe, viable, and better than the alternative, and where is it fragile? | A single service, per site | Yes. Ten dimensions across all four stages, with equity and time overlays | A clear conclusion on one Diagnostic Wheel | Repeatable, run before difficulty sets in |
| National benchmarking and improvement programmes | How does our variation compare with peers? | By specialty and provider | Partial, focused on productivity and quality | Benchmarked data and improvement actions | Periodic deep dives and a standing portal |
| Commercial benchmarking analytics | Where do we sit against peers on mortality, activity and cost? | Provider and specialty | Partial, weighted to outcomes, activity and cost | Dashboards, signals and comparative reports | Ongoing subscription |
| Regulatory assessment | Does this service meet a regulatory standard? | Provider and service | Quality and governance focused | Ratings and inspection findings | Periodic inspection |
| Formal reconfiguration assurance | Does this proposed change meet the tests and clinical evidence base? | A proposed change to a service | Focused on the change case | An independent assurance opinion | Triggered only by a proposal |
Questions boards ask
What is the Clinical Service Evaluation System?
It is how we assess whether a clinical service is meeting patient need, clinically safe, delivering acceptable quality outcomes, economically viable, and better than the alternatives available in the system. Each service is assessed against ten dimensions organised into four stages, Demand, Inputs, Outputs and Context, and a clear conclusion is summarised on a one-page Diagnostic Wheel.
What is service fragility?
Service fragility in the NHS is primarily an operational reality, not a regulatory one. A service can be fully compliant on paper and still be fragile, for example too small to sustain a safe rota, or quietly drifting on outcomes while it leans on a workforce that is one resignation away from a gap.
Is the system quantitative or qualitative?
Both. We maintain quantitative models for six of the ten dimensions, drawing on published Royal College, NHS England, NICE and GIRFT guidance with calibrated proxies where service-specific data is not available. The remaining four dimensions combine quantitative inputs with structured qualitative assessment.
How is this different from a Clinical Service Review?
Where our Clinical Service Review brings objectivity to a single service already in difficulty, the system gives a board a consistent way to test the strength or fragility of every service it runs, before difficulty sets in.
When should a board use it?
The system earns its place when a board is weighing service-level decisions: reconfiguration and centralisation, network design, succession planning for sub-scale services, capital prioritisation, a response to CQC or regulatory concern, or as the spine of a wider clinical strategy.
Talk to us
To understand the strength or fragility of the services you commission, deliver or are accountable for, talk to us. A short conversation can clarify fit and priorities.
hello@strasys.uk