# V2 DRM A/B Testing

V2 DRM A/B testing measures whether DRM affects sales/piracy rates with
protected vs DRM-free cohorts. The infrastructure uses aggregate storefront
sales metrics and privacy-safe piracy-rate proxy metrics; it does not export raw
account identifiers or automate penalties.

sales/piracy rates. aggregate storefront sales metrics. no raw PII export.

## Experiment Coverage

`V2/ue/Build/DRM/v2-drm-ab-testing.json` defines the approved DRM A/B testing
experiments. Each experiment has a ProtectedDRM variant and a DRMFree variant, a
storefront-region-day assignment unit, a 28-day analysis window, a minimum
sample size of 10000, and 95 percent confidence reporting.

Sales impact uses aggregate unit sales, revenue per visitor, and conversion
rate. Piracy-rate impact uses aggregate anti-tamper telemetry, activation-gap,
and unauthorized-launch proxy metrics. The DRM-free variants depend on
`V2/ue/Build/DRM/v2-drm-removal-pathway.json`, and every experiment must account
for the performance confound checks from
`V2/ue/Build/DRM/v2-drm-impact-benchmarking.json`.

## Privacy And Approval

DRM A/B tests require pre-registration, privacy-preserving aggregation, no raw
PII export, legal privacy review, publishing approval, security review, human
review, public result summaries, and a rollback runbook. Anti-tamper telemetry
is used only as an aggregate piracy-rate proxy and remains subject to manual
review before any penalty decision.

## CI Gates

`V2/ue/Tools/plan-v2-drm-ab-testing.py` emits the deterministic DRM A/B testing
plan. `V2/ue/Tools/check-v2-drm-ab-testing.py` validates the manifest, planner
output, DRM removal dependency, impact benchmarking dependency, anti-tamper
telemetry dependency, privacy guardrails, Horde wiring, CI workflow wiring, and
this runbook.

Required release gates:

- `drm-ab-testing-plan-generated`
- `drm-ab-testing-experiment-coverage`
- `drm-ab-testing-variant-coverage`
- `drm-ab-testing-sales-metric-coverage`
- `drm-ab-testing-piracy-metric-coverage`
- `drm-ab-testing-privacy-guardrails`