You Built a Structured Hiring Process. Now Measure Whether It's Working.

Most mid-market companies I work with have crossed the first bridge. They have moved past "the founder interviews everyone" and built some kind of structured hiring process. There is a rubric. Interviewers ask the same questions. Someone tracks scores in a spreadsheet or an ATS.

The problem is they never crossed the second bridge.

They cannot tell you whether the process is working.

Ask a VP of People at a 150-person company how they know their hiring process improves culture, and you will usually get one of two answers. Either a retention stat ("our 12-month retention is 85 percent") or a narrative ("we have not had any major culture issues lately"). Neither is a real signal. Retention can be high because the job market is tight and nobody has a better offer. Absence of drama is not the same as presence of fit.

Here is a 3-signal feedback loop that takes about 90 minutes per quarter to run and tells you whether your hiring process is actually strengthening your culture or just filling seats.

Signal 1: The 90-Day Survival Score

Most companies track retention at 12 months. That is too late. By month 12, a bad-fit hire has already damaged team morale, burned manager trust, and probably inspired at least one good employee to start looking.

Track survival at 90 days instead. But do not just track binary "still employed or not." Score each new hire on three dimensions:

1. Ramp speed. Did this person reach baseline productivity faster or slower than the last three hires in the same role? Baseline productivity means they can handle the core workflow without a manager checking their work.

2. Culture signal. In their first 90 days, did this person reinforce the culture or dilute it? Ask their three closest collaborators one question: "Has working with [name] made the team feel more or less like the company you joined?" Score on a 1-5 scale.

3. Manager regret. Ask the hiring manager one question at day 90: "Knowing what you know now, would you make the same hire again?" Yes is a pass. "Yes, but..." is a yellow flag worth investigating. No is a structural problem.

Score each hire from 0-15 (5 points per dimension). Anything below 9 is a red flag, not on the individual hire, but on the process that produced them.

The pattern matters more than individual scores. If your last five engineering hires all score 12 or above but your last three sales hires are averaging 7, your process is fine. Your sales rubric is broken. Fix the rubric, not the whole system.

Signal 2: Manager Interview Calibration Drift

At 30 people, every hiring manager knew the standard because the founder set it every day. At 150 people, managers are calibrating against their own internal compass, which drifts a little more each quarter they go without a reset.

Here is the test. Once per quarter, pull the last 10 interview scorecards from each department. Look at the distribution of scores. You are looking for one pattern:

Is any department consistently scoring candidates higher than others?

If your engineering team's average candidate score is 4.2 out of 5 and your marketing team's is 3.1, one of two things is happening. Either engineering is getting a meaningfully stronger candidate pool (possible, but rarer than you think), or engineering managers have lowered their bar without realizing it.

This is not about blame. Calibration drift is natural. Every manager wants to fill their open headcount. Over time, the temptation to nudge a 3 to a 4, then a 4 to a 5, is strong. But unchecked, you end up with a marketing team hired to a high bar and an engineering team hired to a lower one. Six months later, cross-functional tension spikes and nobody can trace it back to a hiring pattern.

The fix is not to shame managers for drift. It is to spend 30 minutes per quarter looking at each department's score distribution, flagging outliers, and asking one question: "What would have to be true for these scores to reflect real candidate quality differences rather than calibration drift?" If the answer is unconvincing, run a calibration session.

Signal 3: The Culture Contribution Ratio

This is the signal nobody tracks and the one that matters most.

At the end of each quarter, look at your last 12 months of hires. Sort them into three buckets:

• Culture builders. People who have visibly made the culture stronger. They mentor new hires without being asked. They push back on shortcuts that erode standards. Other people want to work with them.
• Culture neutral. Competent performers who do their job and go home. They are not a problem. They are also not making anything better.
• Culture subtractors. People whose presence makes the team feel worse. High performers who burn bridges. Politicians who manage up but not across. People others avoid.

Calculate your Culture Contribution Ratio: builders divided by subtractors, expressed as a ratio.

A healthy mid-market company should be running at 3:1 or better. For every culture subtractor, you need at least three culture builders to offset the drag. If your ratio is 1:1 or worse, your hiring process is optimized for competence at the expense of culture. You are hiring people who can do the job but who make the company worse to work at.

One 90-person professional services firm I worked with ran this analysis and discovered their ratio was 0.8:1. They had more culture subtractors than builders. Their retention numbers looked fine because the job market was soft. But their best people were quietly interviewing elsewhere. The ratio caught it six months before the retention data did.

Putting the Three Signals Together

Run all three signals once per quarter. It takes roughly 90 minutes:

• 30 minutes: Pull 90-day survival scores on all recent hires and calculate averages by department.
• 30 minutes: Pull interview scorecard distributions by department and look for calibration drift.
• 30 minutes: Categorize the last 12 months of hires into builders, neutral, and subtractors. Calculate the ratio.

The output is not a 50-slide deck. It is a one-page memo with three numbers and one paragraph of interpretation. Something like:

"90-day survival: 11.2 average (healthy). Calibration: sales scoring 0.8 higher than other departments (minor drift, worth a calibration session). Culture contribution ratio: 2.1:1 (below target of 3:1, driven by three subtractor hires in Q1). Recommendation: recalibrate sales rubric, investigate Q1 hiring panel for pattern."

That is the memo. Share it with the leadership team. Act on it. Then run it again in 90 days.

The point is not to build a measurement bureaucracy. It is to close the feedback loop. Your hiring process is an investment. Treat it like one.