Why is ROI hard to measure here — and what's the fix?

Product leadership works through decisions whose payoff arrives on a lag: the segment call made in month one shows up in win rates two quarters later. Measure only lagging metrics and you can't evaluate anything inside the engagement window; measure nothing and you're buying vibes. The fix is the two-layer structure: leading indicators that predict the lagging ones, checked monthly, with the lagging metrics named up front so everyone knows what the leading ones are for.

What should you see at 30, 60, and 90 days?

Day 30: a diagnosis you couldn't have written yourself — specific, falsifiable, with evidence; a running customer-interview cadence (in my engagements that engine is the first thing built); and one meaningful stop-decision — something the team quit building. Day 60: interview saturation reached and a segment/positioning decision made and written; prioritization runs without the founder adjudicating every conflict. Day 90: the funnel work is live with engineering, the roadmap traces to the strategy in one sentence per item, and — the tell that predicts everything — the team argues from evidence rather than escalating to authority.

Which lagging metrics should move, and when?

Match the metric to the engagement's thesis, don't measure everything: activation and time-to-value if the thesis is onboarding; NRR and expansion if it's retention and packaging; win rate and cycle length if it's positioning; new-ARR efficiency if it's segment focus. Realistic physics: metric movement starts in months 3–6, compounds after. A provider promising lagging-metric movement inside 90 days is either scoping something trivial or selling.

What are the kill criteria?

• Day 45: no written diagnosis with evidence → stop
• Day 45: no customer-interview engine running → stop
• Day 60: no decision the team can name that changed what they build → stop
• Any point: recommendations require buying more of their time to understand → stop
• Any point: you're managing them instead of them driving cadence → stop

Put these in the agreement. The right provider will add to the list — kill criteria protect good operators too, because they make the engagement's value legible.

What does the ROI arithmetic look like?

A three-month engagement at my rate is $24,000. Price it against the failure modes it exists to prevent: two engineering quarters on the wrong bet (payroll math makes this six figures at 8+ engineers), a mispriced product (a 10% realized-price gap at $5M ARR is $500K/year), a mis-hired VP of Product (comp plus a lost year), or a flat fundraise narrative. The ROI case is not "product gets better" — it's one large error not made. One is enough; the engagement pays for itself many times over on any line above.