# Run a quick GA4 funnel over known steps

> Tier: recipe. Operating recipe: real tool sequence, core rules, known traps.

The fast funnel read when steps are known and trusted, the light sibling of funnel-analysis.

**Intent.** The drop-off curve for an already-instrumented funnel.

## When to use

- Routine funnel monitoring.
- Before/after a release, same steps.

## When not to use

- Unverified steps: funnel-analysis checks instrumentation first.

## Sources

Required: Google Analytics 4

## Preconditions

- The account is ticked in the dashboard, confirmed via list_accounts.

## Inputs

- `window`: Analysis window. Default: last 30 days.

## Procedure

1. Run the funnel over the known steps. — tools: `ga4_run_funnel_recipe`, `ga4_run_advanced_funnel_report`
2. Compare the worst step against the baseline.

## Decision rules

- **When** The worst step moved beyond noise since baseline → **conclude** Escalate to funnel-analysis with segments: the quick read locates, the deep read explains.

## Evidence requirements

- Every figure carries its account, metric and window.
- Anything below a readable sample size is reported as unjudged, not as zero.

## Human approval boundary

- The readout changes nothing. Any change it motivates goes through Safe Writes: preview, human confirmation, then apply.

## Failure modes

- Session vs user scope changes the curve: keep the construction constant across reads.

## Output

- **Readout**: The figures, with windows and accounts named.
- **Flags**: What deserves a deeper skill or a human decision.

## Related

- Skill: [funnel-analysis](https://www.getmcpads.com/skills/funnel-analysis.md)