# SA-PROC-APC-FDC-002 - APC, FDC, And Feedforward Decision Replay

Version: 2026-08-22-v89

## Purpose

This browser CSV replay teaches how advanced process-control evidence should keep equipment-data context, FDC state, virtual-metrology uncertainty, sampling coverage, feedforward/feedback handoff, role view, and the next safe check together. It is decision-literacy material, not an APC system, FDC deployment, process recipe, equipment-control workflow, or quality disposition.

## Dataset

- Rows: 6144
- Module contexts: 6
- Signal packs: 4
- FDC states: 4
- Control handoff views: 4
- Sampling plans: 4
- Role views: 4
- Live server runs: 0

## Method

1. Define conceptual module contexts and source-anchored APC/FDC/VM vocabulary without factory data or settings.
2. Sweep signal pack, FDC state, control handoff, sampling plan, and role view.
3. Compute synthetic teaching proxies for data quality, drift pressure, fault likelihood, classification confidence, metrology coverage, VM uncertainty, feedforward value, feedback risk, false-alarm risk, wafer-at-risk, decision readiness, and decision gate.
4. Store source links, CSV, typed JSON, model card, and public boundary together.

## Public Boundary

- No SEMI standard body, article body, figure, tool log, equipment trace, metrology table, model code, or factory procedure is copied.
- No process recipe, equipment-control instruction, APC programming, FDC deployment rule, interlock procedure, live server model, or quality disposition is active.
- No uploaded wafer data, proprietary tool data, production setting, foundry claim, product claim, qualification claim, public service intake, account, payment, comment, or job workflow is enabled.

## Replacement Evidence Needed

Real engineering reuse would need owned equipment-data definitions, trace identity, physical metrology, VM model-quality records, uncertainty budgets, sampling policy, FDC review evidence, change-control records, integration context, and process/metrology/yield owner approval.