34 lines
1.3 KiB
Markdown
34 lines
1.3 KiB
Markdown
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# Decision: Harden NRMSE and Use Metric Profiles in RotatingMachine
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- Date: 2026-02-24
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- Scope: `nodes/generalFunctions/src/nrmse/*`, `nodes/rotatingMachine/src/specificClass.js`
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## Context
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Drift analytics were previously single-path and flow-focused with weak input safeguards in NRMSE.
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Requirement: make NRMSE architecturally robust and apply it across multiple measurements in rotatingMachine.
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## Decision
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Adopt a metric-profile drift architecture:
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1. Harden `generalFunctions/nrmse` with:
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- strict validation for malformed inputs
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- timestamp-aware alignment support
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- per-metric state
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- configurable rolling window and EWMA long-term trend
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- point-based API (`assessPoint`) while retaining legacy calls
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2. Rewire rotatingMachine to consume NRMSE per metric:
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- `flow` model drift
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- `power` model drift
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- pressure-quality drift as node-specific plausibility/redundancy assessment
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3. Expose drift and confidence outputs per metric in node output payload.
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## Consequences
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- Drift computations are deterministic and safer under bad inputs.
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- RotatingMachine confidence now reflects multiple measurement channels.
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- Output schema expands with power/pressure drift fields.
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## Rollback Notes
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- Revert `errorMetrics.js` and rotatingMachine drift wiring to return to legacy flow-only drift behavior.
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