Xavier Fok

Lagging indicators report a result you can no longer change. Leading indicators move first. Here is how to pair a couple of each without getting fooled.

Two things moving together does not mean one caused the other. How confounders and small samples fool founders, and the habits that keep you honest.

AI can clean and categorize messy business data in an afternoon, but it fails quietly. Here’s where it saves hours and how to check its work.

Survivorship bias makes your numbers lie by hiding what failed. Here is how to spot the missing data and read your business metrics honestly.

The SaaS quick ratio compares the recurring revenue you add to the revenue you lose. Here is how to read it and where it misleads a small business.

Data governance for a one person business, stripped down to a few light rules that keep your numbers honest and make a future handoff painless.

Gross margin is the revenue you keep after delivery costs. Here’s what it means for a one-person SaaS and why it sets your ceiling on spending.

Customer segmentation groups your users into a few useful buckets so you treat each the right way. Here’s how to do it without slicing your list too thin.

A tracking plan is a written list of every event you record, what it means, and its properties. Here’s how to build one before your analytics turns to mush.

Active users come in daily, weekly, and monthly counts. Here’s what each window tells you, how the stickiness ratio works, and the common misreads.