Hiring, signal vs noise

Hiring is the single highest-leverage activity in a company, and the one most managers do worst. The cost of a bad hire is 3-5x their salary when you count ramp, lost output, team drag, and eventual severance. Yet most interview processes measure charisma, not performance.

What predicts job performance (validated research)

Meta-analyses of hiring-success predictors, ranked by correlation with actual performance:

• Work sample tests, having them do the actual job (r ≈ 0.54)
• Structured interviews, same questions, scored rubric (r ≈ 0.51)
• Cognitive ability tests, r ≈ 0.51
• Integrity tests, r ≈ 0.41
• Reference checks (done well), r ≈ 0.26
• Years of experience, r ≈ 0.18 (weak)
• Unstructured interviews, r ≈ 0.14 (shockingly weak)
• Age, r ≈ 0.01 (no predictive value)

What most companies do: unstructured interviews + vibe. What they should do: work samples + structured interviews.

The core principle: predict work by watching work

The best interviews are ones where the candidate does something that looks like the actual job. An engineer pairs on real code. A marketer drafts a real email. A salesperson runs a simulated call. The signal is enormous compared to "tell me about a time when you…"

The hiring process that works

Stage 1: Role scorecard (before posting)

What does success look like in this seat after 90 days? 1 year? If you can't write this in 1 page, you're not ready to hire. See The role scorecard.

Stage 2: Sourcing

Inbound only = slow + biased toward people who see your post. Best hires are often passive candidates sourced directly. Invest in sourcing, not just application review.

Stage 3: Screen (20-30 min)

Recruiter or hiring manager. Goals: confirm baseline fit, compensation alignment, motivation. Avoid elaborate questions, this is a filter, not an interview.

Stage 4: Hiring manager interview (45-60 min)

Structured. Same questions for every candidate. Scored rubric. Topics:

• Deep-dive on a past project relevant to the role
• Situational: "here's a scenario, walk me through how you'd approach it"
• Tradeoff questions that reveal thinking style

Stage 5: Work sample (60-120 min)

Paid, always. Something concrete they'd actually do in the job. Bonus: do it together so you see their working style, not just the output.

Stage 6: Panel interviews (60 min each)

3-5 people from the team. Each person owns 1-2 specific dimensions. Post-interview, each writes their evaluation BEFORE talking to anyone else. Group discussion after, no anchoring.

Stage 7: References

Do them. Back-channel even more than front-channel. Ask specific questions: "On a scale of 1-10, where was [candidate] in your team?" "Would you hire them again?" "What was the hardest thing for them?"

Stage 8: Offer

Fast. Move decisively. A week to decide + extend beats 3 weeks of deliberation. Top candidates have options; speed matters.

The "no hire" is cheaper

When the team is split, default to "no hire." A bad hire costs 3-5x salary. A missed good hire costs.., you keep looking. The asymmetry is massive.

Interview questions that actually reveal something

• "Walk me through the most complex project you've run, end to end."
• "Tell me about a conflict with a peer. What did you do?"
• "What's a decision you made that you later realized was wrong?"
• "Who are the 3 best people you've worked with? What made them great?"
• "If I called [specific former manager], what would they say are your strengths and weaknesses?"

Red flags

• Blames past employers / teammates for problems
• Can't describe their impact in concrete numbers
• Over-polished answers (rehearsed)
• No mistakes in their work history (evasion)
• Over-indexed on credentials vs, outcomes
• Won't share specifics (confidentiality excuse is sometimes real, often a dodge)

Green flags

• Describes failures + what they learned
• Credits team members for wins
• Asks substantive questions about the role + business
• Articulates tradeoffs + uncertainty
• Can describe their impact in numbers
• References check out with specifics

The most underrated signal

How do they treat the receptionist, coordinator, and anyone not in the interview? The real personality shows up when nobody's "watching."