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

THE MAIN POINT

Which operational cost deserves attention?

0s

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

E11 · Hidden cost driver

Synthetic practice, not company performance.

One decision

Which operational cost deserves attention?

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 c.component,SUM(c.quantity) units,c.unit,SUM(c.cost_usd) cost_usd FROM sim_costs c JOIN b USING(task_id) GROUP BY c.component,c.unit ORDER BY cost_usd DESC;

Download SQL · Result CSV · Metabase saved question

Chart and reading

Synthetic practice chart

Rank dollar components, not summed heterogeneous units.

Challenge your recommendation

Would suppressing support tickets only hide work?

Guardrails: Do not add heterogeneous units; quantity and rate remain component-specific.

Next evidence: Support resolution quality, invoice reconciliation and utilization assumptions.

PRD sections: 14, 17. 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

E11 · Hidden cost driver

Decision: Which operational cost deserves attention?

Readout: Rank dollar components, not summed heterogeneous units.

Actual query output (synthetic), first rows:

component units unit cost_usd
support 3871.66 staff_minute 2129.413
vendor_review 1554.456 staff_minute 1010.3964
render_compute 343760.0 compute_second 110.0032

Model spoken answer: I would investigate the largest avoidable cost component and protect the quality of support.

Caveat/counterargument: Would suppressing support tickets only hide work? Do not add heterogeneous units; quantity and rate remain component-specific.

Next evidence: Support resolution quality, invoice reconciliation and utilization assumptions.

Deliberately left out: Raw unit counts across seconds, GB and staff minutes.

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Your practice notes

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

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