PrimeLeaper · AI Apprentice · Technical proof

What happens when the system should stop?

The Apprentice can prepare a recommendation only when the evidence, pattern, currency, and authority requirements are satisfied. These fictional states show what happens when they are not.

Return to the prepared case →

Illustrative deterministic demo. One case family: backside grind, post-grind thickness, target 75 µm with LSL 72 and USL 78. Every value below is fixed in this file — no language model runs on this page.

  • Fictional data and judgment
  • No live customer data
  • No production electronic signature
State

State 1 of 3 · requirements satisfied

NCR-2041 · Lot C-4471 · backside grind

Recommendation prepared

Outcome at a glance

A Hold recommendation is prepared.

Evidence is sufficient for the mapped pattern · guidance is current · approval is available.

This is the only one of the three states in which the Apprentice presents a settled disposition recommendation. It is prepared, not decided.

Required reviewer
J. Alvarez · Disposition Authority
Judgment currency
Current · mapped 2026-06-12
Approval
Available to the authorized reviewer
Subgroup (n=5) 71.4 · 71.8 · 71.5 · 71.7 · 71.6 µm Lot mean 71.6 µm · below LSL 72
Six-lot means 75.0 → 74.6 → 74.3 → 73.7 → 72.8 → 71.6 µm

Prepared recommendation · not a decision

HOLD

contain · confirm · investigate

  • QUARANTINE CURRENT LOT
  • CONFIRM METROLOGY
  • REVIEW AFFECTED SCOPE
  • CHECK WHEEL WEAR AND DRESSING HISTORY
  • NOTIFY PROCESS ENGINEERING

Pattern-selection result

current_match → GRIND-DISP-DRIFT-002 · v2.0 · CURRENT

One candidate satisfied every precondition. Release and use-as-is stay closed until the outstanding dressing record and any customer concession are resolved.

Missing evidence

  • Wheel dressing log, current run. Not produced; recorded as open and requested.

It does not block containment or the Hold call. It blocks cause confirmation and any release or use-as-is path. Nothing else the mapped pattern requires is outstanding.

Deterministic checks

Fixed rules, evaluated before any pattern is considered.

  • Lot mean below LSLTRUE · 71.6 < 72.0 µm · hold gate fires
  • One-way trend length6 lots · precondition ≥5 met
  • Gauge verification currentTRUE · last verified 2026-06-14
  • TTV within 1.5 µm capTRUE · 5 wafers × 9 sites
  • Material revision unchangedTRUE · across all six lots
  • Re-verification trigger firedNONE · no tooling or spec change
  • Evidence sufficient for patternTRUE · hold path only

Approval availability

Available to the authorized reviewer.

Every requirement is satisfied, so the prepared Hold can be signed by the authorized disposition role. This technical-proof page carries no decision controls of its own.

Make the decision in the prepared case →

RouteJ. Alvarez · Disposition Authority. MRB review is required if customer concession, broader affected scope, or unresolved risk enters.

Pattern · version

GRIND-DISP-DRIFT-002 · v2.0

Prepared by · timestamp

AI Apprentice · 2026-06-20T14:05-04:00

Re-verification trigger

none fired

Package fingerprint

sha256:4c1f9a…e7b2

Illustrative deterministic demo · fictional data and judgment · no live customer data · no production electronic signature. The fingerprint and timestamp are fictional illustrations.

Inspect the technical trace NCR-2041 · current_match

Inputs

lot=C-4471step=backside_grind char=post_grind_thicknessn=5 target=75µmLSL=72USL=78 mean=71.6µmhistory=6_lots

Deterministic checks

below_lsl=trueone_way_trend_lots=6 gauge_current=truettv_within_cap=true material_rev_changed=falsetooling_change=false evidence_sufficient=true

Pattern candidates

GRIND-DISP-DRIFT-002 · v2.0SELECTED

Cue matched: sustained one-way downward movement across six lots on a subtractive step, with the current lot mean below LSL. Boundary conditions satisfied: metrology current, trend sustained, no re-verification trigger fired.

GRIND-METRO-SINGLE-001 · v1.1EXCLUDED

Applies to an isolated low result with no sustained trend. Precondition one_way_trend_lots < 3 is not satisfied.

Source references · fictional record

  • NCR-18932026-04-16 — same characteristic, sustained downward trend; wheel replacement arrested the drift; held with process action required.
  • NCR-20072026-06-02 — same drift signature; dressing interval shortened.
  • NCR-17102026-02-09 — single low result, no sustained trend; metrology confirmation invalidated the original signal.
  • SPEC-GRIND-THK-12§4.2 thickness limits and SPC trend rule (fictional specification).
  • WHEEL-LIFE-LOG-07Wheel wear and dressing history (fictional log).

Selected judgment block · raw

PatternGRIND-DISP-DRIFT-002 · v2.0 · status CURRENT (approved only inside this fictional demonstration)
CuePost-grind subgroup mean moves one direction across five or more consecutive lots toward the lower limit on a subtractive step, and the current lot mean falls below LSL.
WhyGrinding only removes material, so a one-way downward drift is normally wheel wear or dressing drift that continues until corrected. A breach at the end of such a trend is more likely a developing systematic condition than an isolated unit.
DecisionHOLD. Contain first, confirm the measurement, then establish scope and cause.
BoundaryApplies only when current metrology is valid and the downward trend is sustained.
Re-verify onWheel change, revised dressing recipe, specification revision, or material revision change.
AuthorityAn authorized disposition role signs. MRB review when concession, broader scope, or unresolved risk enters.
OwnerR. Okonjo · Process Engineering Lead (fictional person).

Decision package · compact

{
  "case_id": "NCR-2041",
  "lot": "C-4471",
  "process_step": "backside_grind",
  "characteristic": "post_grind_thickness_subgroup_mean",
  "specification_um": { "target": 75, "lsl": 72, "usl": 78 },
  "subgroup_um": [71.4, 71.8, 71.5, 71.7, 71.6],
  "lot_mean_um": 71.6,
  "lot_mean_history_um": [75.0, 74.6, 74.3, 73.7, 72.8, 71.6],
  "deterministic_checks": {
    "below_lsl": true,
    "one_way_trend_lots": 6,
    "gauge_verification_current": true,
    "ttv_within_cap": true,
    "material_revision_changed": false,
    "tooling_change_since_mapping": false,
    "evidence_sufficient_for_pattern": true
  },
  "evidence_open": ["wheel_dressing_log_current_run"],
  "selection_result": "current_match",
  "judgment_block": { "id": "GRIND-DISP-DRIFT-002", "version": "v2.0" },
  "currency_state": { "state": "current", "mapped": "2026-06-12", "trigger_fired": [] },
  "recommendation_status": "prepared",
  "proposed_disposition": "hold",
  "immediate_action": "quarantine_current_lot",
  "prepared_actions": [
    "quarantine_current_lot", "confirm_metrology", "review_affected_scope",
    "check_wheel_wear_and_dressing_history", "notify_process_engineering"
  ],
  "blocked_paths": ["release", "use_as_is"],
  "approval_available": true,
  "approval_blocked_reason": null,
  "required_reviewer": "Disposition Authority",
  "routed_to": "J. Alvarez / Disposition Authority",
  "signed": false,
  "prepared_by": "PrimeLeaper AI Apprentice",
  "timestamp": "2026-06-20T14:05:00-04:00",
  "fingerprint": "sha256:4c1f9a...e7b2"
}