PJ / DEEPBRAINInterview decision lab
STUDY GUIDE · 23 OCT 2026
deepbrain.define-labs.com
Practice / PERSONAL STUDY · PUBLIC, SYNTHETIC & PROPOSED LABELS APPLY

THE MAIN POINT

Does fast production save customer time?

0s

Uses your device's speech voices. No paid API. Test your speaking pace aloud.

E10 · Review burden

Synthetic practice, not company performance.

One decision

Does fast production save customer time?

Run the exact query

WITH b AS (SELECT * FROM v_task WHERE ('all'='all' OR persona='all') AND ('all'='all' OR workflow='all') AND ('all'='all' OR substr(signup_at,1,7)='all') AND date(created_at)>='2026-05-01' AND date(created_at)<'2026-10-01') SELECT workflow,COUNT(reviewed_at) reviewed_tasks,AVG(prep_minutes) prep_minutes,AVG(review_minutes) review_minutes,AVG(repair_minutes) repair_minutes,AVG(manual_baseline_estimate_minutes-prep_minutes-review_minutes-repair_minutes) estimated_net_minutes FROM b WHERE reviewed_at IS NOT NULL GROUP BY workflow;

Download SQL · Result CSV · Metabase saved question

Chart and reading

Synthetic practice chart

State preparation, review and repair separately; net estimate is not causal savings.

Challenge your recommendation

Is the manual baseline measured or estimated?

Guardrails: Manual baseline is an invented estimate; net time is not causal savings.

Next evidence: Matched same-task baseline, quality parity and downstream workload.

PRD sections: 3, 12, 14. Open proposed PRD

Your spoken decision

State one takeaway, one caveat and one action in 30 seconds. Then stop.

Connect this finding

What this chart helps decide · Follow the connected decision · Canonical metric definitions

Optional model answer — try your own first

E10 · Review burden

Decision: Does fast production save customer time?

Readout: State preparation, review and repair separately; net estimate is not causal savings.

Actual query output (synthetic), first rows:

workflow reviewed_tasks prep_minutes review_minutes repair_minutes estimated_net_minutes
api_template 187 7.591871657754011 12.856256684491978 10.337272727272726 88.73106951871657
document_avatar 172 7.785697674418605 12.92029069767442 11.522441860465115 124.84831395348837
dubbing 158 7.384050632911393 14.000316455696204 13.926645569620252 94.23981012658227

Model spoken answer: Faster rendering helps only if total customer work falls; I would measure preparation, review and repair.

Caveat/counterargument: Is the manual baseline measured or estimated? Manual baseline is an invented estimate; net time is not causal savings.

Next evidence: Matched same-task baseline, quality parity and downstream workload.

Deliberately left out: A causal productivity percentage based on an invented baseline.

All exercises

Your practice notes

Write your answer first. Notes autosave locally; reading completion does not judge correctness.

Study tools