calculation trainernowproject
Localise the first invalid step and bound ECF
Align structured work to the solution graph, identify the earliest invalid step, classify misconceptions, and apply bounded error-carried-forward rules.
- Stable ID
sprint.diagnosis-ecf- Item version
- 1.0.0
- Time
- 135 min
- Status
- ready
Reading lens
Focus
- step alignment
- first-invalid-step diagnosis
- bounded ECF
- misconception taxonomy
Ignore for now
- unbounded partial credit
- free-form answer judgement
- diagnosis without policy provenance
Canonical sources
Open the material
Before reading
How can the evaluator distinguish a new error from a correct operation on a carried-forward value?
After reading
Trace one wrong path through alignment, first-invalid-step selection, misconception classification, and bounded ECF.
Knowledge check
What prevents ECF from becoming arbitrary generosity?
Write an answer to unlock the reference
ECF is limited to explicit policy nodes and dependency paths in a versioned marking policy. The trace records the originating error, carried value, eligible downstream nodes, awarded marks, and any review-required boundary.
AI_DRAFT · The frozen ECF policy is not expert reviewed.Working notes