Requirements traceability¶
Status: partial. This is the reviewable requirement-by-requirement traceability record for roadmap R9. It begins with the clinical calculation and chart-rendering critical path. Observation entry, workflow, supplier, deployment, and interoperability requirements remain to be allocated individually in later rows; they are not implicitly claimed by this component.
How to use this matrix¶
- Component implemented: this repository implements the bounded behaviour. Evidence identifies code and automated tests; it is not a complete-solution compliance claim.
- Component planned: the responsibility belongs to the component but evidence is incomplete or the feature is not implemented.
- Shared: the component can support part of the requirement from supplied data, while the host/EPR owns record entry, workflow, persistence, or local policy.
- Host/deployer: the requirement belongs outside the component boundary.
- Deliberate exclusion: the component will not implement the requirement. The reason and governing decision are stated.
The complete source requirements remain the UI specification and clinical/technical specification. The product boundary explains the allocation model and permitted claims.
Clinical calculation and chart rendering¶
| Requirement | Allocation and state | Evidence |
|---|---|---|
U1.1 |
Component planned. Accessible rendering and an evidenced colour-blindness approach require browser evidence. | Roadmap R14; SAFETY.md H-008 |
U3.1 |
Component implemented. Fixed time windows provide more or less chart detail without changing the score. | chart/chart.js; implementation-notes.md |
U3.2 |
Component implemented. The default view ends at the latest supplied observation. | chart/chart.js; demo/demo.js |
U3.5 |
Component implemented. Exact plotted values are available by interaction. | chart/chart.js |
U3.6 |
Component implemented. Chart dots and interaction expose exact values. | chart/chart.js |
U3.7 |
Component implemented. Numeric y-axes increase upwards; categorical rows use score severity. | chart/chart.js |
U3.9 |
Shared. The component renders supplied skipped values and reasons; the host captures them. | chart/chart.js; data-model.md |
U3.10 |
Component implemented. A skipped value breaks the trend line. | chart/chart.js; SAFETY.md SC-005 |
U3.11 |
Component implemented. The time axis and interaction identify observation times. | chart/chart.js |
U3.13 |
Component implemented. Observations use visible dots distinct from trend lines. | chart/chart.js |
U3.14 |
Component implemented. Numeric observations are plotted at their exact position within each scoring band. | chart/chart.js; implementation-notes.md |
U9.5 |
Component implemented. Oxygen-delivery observations use plotted markers. | chart/chart.js |
U9.6 |
Component implemented. Oxygen delivery trends connect compatible observations. | chart/chart.js |
U9.7 |
Component implemented. Changing oxygen-delivery units causes a line break. | chart/chart.js; SAFETY.md SC-005 |
U10.4 |
Component implemented. Heart-rate observations use exact plotted markers. | chart/chart.js |
U10.5 |
Component implemented. Heart-rate trends connect consecutive observations. | chart/chart.js |
U11.5 |
Component implemented. Systolic and diastolic values use joined inward-pointing markers. | chart/chart.js; roadmap R49 |
U11.7 |
Component implemented. No horizontal trend line joins separate blood-pressure observations. | chart/chart.js |
U12.4 |
Component implemented. Capillary refill uses scored categorical presentation. | chart/chart.js |
U15.4 |
Component implemented. Temperature observations use exact plotted markers. | chart/chart.js |
U15.5 |
Component implemented. Temperature trends connect consecutive observations. | chart/chart.js |
U17.6 |
Shared. The component presents the calculated level and guidance; the host owns the end-of-entry workflow. | chart/chart.js; product-boundary.md |
C1.2 |
Component implemented. Canonical scoring bands and colours are generated from one source. | npews-scoring-spec.json; test/scoring/config-matches-spec.test.js |
C1.3 |
Component implemented. National threshold changes are made in canonical JSON and generated into runtime artefacts. | npews-scoring-spec.json; scripts/generate-scoring.mjs |
C1.4 |
Component implemented. Inclusive band scoring selects the applicable specified result. | chart/npews-scorer.js; test/fhir/score-conformance.test.js |
C2.2 |
Deliberate exclusion. Exact calendar age selects the band; the adjacent-form override is not supported. | product-boundary.md; D15 in decisions.md |
C2.3 |
Component implemented. The chart resolves and renders the supported national age bands. | chart/npews-scoring-config.js; chart/age-band.js |
C3.1 |
Shared. The component renders supplied observations with fixed windows; the host retrieves the longitudinal record. | chart/chart.js; product-boundary.md |
C3.12 |
Host/EPR. Previous admissions and record retrieval are outside the component. | product-boundary.md |
C3.13 |
Shared. The component labels its view; the host identifies historical records and admissions. | chart/chart.js; product-boundary.md |
C3.17 |
Shared. The component accepts and displays supplied skip reasons; the host prompts and persists them. | data-model.md; product-boundary.md |
C5.2 |
Component implemented. Respiratory rate is rendered as an exact value and trend. | chart/chart.js |
C5.3 |
Component implemented. Respiratory-rate bands are scored from canonical configuration. | chart/npews-scorer.js; npews-scoring-spec.json |
C5.4 |
Component implemented. Respiratory-rate trends are rendered. | chart/chart.js |
C6.4 |
Component implemented. Respiratory-distress categories produce defined scores. | chart/npews-scorer.js |
C6.5 |
Component implemented. Age-band configuration varies respiratory-distress presentation and scoring. | npews-scoring-spec.json |
C7.2 |
Component implemented. Oxygen saturation is scored from canonical bands. | chart/npews-scorer.js |
C7.3 |
Component implemented. Oxygen saturation is rendered as an exact value. | chart/chart.js |
C8.2 |
Component implemented. High-flow devices override oxygen-delivery score. | chart/npews-scorer.js; C17.11 below |
C8.6 |
Partial. Device changes are retained in data; clinically useful change presentation remains R22. | Roadmap R22 |
C9.2 |
Component implemented. Oxygen delivery is rendered as percentage or litres per minute. | chart/chart.js; data-model.md |
C9.4 |
Component implemented. Oxygen delivery is scored from canonical bands. | chart/npews-scorer.js |
C9.6 |
Component implemented. Unit changes break oxygen-delivery trends. | chart/chart.js; SAFETY.md SC-005 |
C10.2 |
Component implemented. Heart rate is rendered as an exact value and trend. | chart/chart.js |
C10.3 |
Component implemented. Heart rate is scored from canonical bands. | chart/npews-scorer.js |
C11.2 |
Component implemented. Systolic and diastolic blood pressure are rendered. | chart/chart.js |
C11.3 |
Component implemented. The data contract carries systolic and diastolic values. | data-model.md |
C11.4 |
Component implemented. Systolic and diastolic points are joined. | chart/chart.js |
C11.6 |
Component implemented. Systolic blood pressure is scored from canonical bands. | chart/npews-scorer.js |
C12.2 |
Component implemented. Capillary refill is scored from canonical rules. | chart/npews-scorer.js |
C12.3 |
Component implemented. Capillary refill is rendered as a categorical value. | chart/chart.js |
C14.1 |
Shared. The contract supports AVPU including asleep; the host owns entry workflow. | data-model.md; escalation.md |
C14.6 |
Shared. The contract supports new sepsis and septic-shock suspicion; the host owns entry workflow. | data-model.md; escalation.md |
C14.7 |
Component implemented. New sepsis and septic-shock suspicion derive the defined escalation. | chart/npews-scorer.js; test/scoring/non-score-escalation.test.js |
C15.2 |
Partial. Temperature is plotted and retained but route capture is host-owned. | chart/chart.js; data-model.md |
C15.3 |
Component implemented. Temperature trends are rendered. | chart/chart.js |
C17.1 |
Component implemented. The scorer calculates and the chart displays total PEWS. | chart/npews-scorer.js; test/fhir/score-conformance.test.js |
C17.2 |
Shared. The component retains trigger short-code provenance; the host owns the clinical record. | chart/npews-scorer.js; escalation.md |
C17.3 |
Component implemented. Escalation provenance is presented in chart status surfaces. | chart/chart.js |
C17.6 |
Component implemented. The highest level across score and supported triggers is calculated. | chart/npews-scorer.js; test/scoring/non-score-escalation.test.js |
C17.11 |
Component implemented. High-flow device scoring takes precedence over oxygen-delivery rate. | chart/npews-scorer.js; test/fhir/score-conformance.test.js |
Supplier, deployment, and integration requirements¶
The following source areas are not component claims. Their individual allocation is the next matrix expansion:
- Observation entry, correction, audit, reporting, comments, local risk factors, and clinical workflow:
U5-U17,C1.1,C2.1,C3.6-C4.5,C13,C16-C20. - Supplier commercial, security, training, environment, governance, availability, and support:
T1-T5,T7. - Interoperability, record transfer, and nationally governed coding:
C1.1,T6, with component-adapter evidence infhir.mdand open coding work in R38.
These requirements are allocated at capability level in the product boundary. R9 remains incomplete until every applicable source ID appears in this matrix with its specific allocation and evidence.