7 min read
Trunk-based development: merging to main at least once a day, in plain words for PMs
Trunk-based development in plain words: why teams merge small changes to main daily, what it needs to work, and what it means for a PM.
Blog
RSS feedPractical articles on statistics, A/B testing and data-driven decisions for product managers and marketers.
9 min read
Product validation: how to validate a product idea before you build it
Product validation through customer conversations: how to validate a business idea in six steps, weak vs strong signals and what commitment to ask for.
5 min read
Break-even point: how to calculate it for an online business, month by month
The break-even point is the volume where contribution covers fixed costs. The formula, a monthly worked example and the margin of safety.
6 min read
Variance analysis: budget vs actual with a driver-based forecast for a small company
Variance analysis made useful: build the budget from drivers, then split the budget vs actual gap into volume, mix, price and FX. A worked monthly example.
6 min read
Contribution margin: formula, example and why it beats gross margin for decisions
Contribution margin is price minus variable costs: what one more sale adds. The formula, a worked example and why gross margin misleads decisions.
5 min read
Fixed vs variable costs (and step costs): how costs behave as a business grows
Fixed vs variable costs: one question sorts every cost. Plus step costs that jump at thresholds, on a year of monthly costs.
6 min read
What is GMV? GMV vs revenue, take rate and what a marketplace really earns
What is GMV, why gross merchandise value isn't revenue, how to calculate take rate and the agent vs principal test, with a worked marketplace example.
6 min read
NPV vs IRR vs payback: how to judge an investment and which number to trust
NPV vs IRR vs payback: what each measure says about an investment, why they disagree, and which one decides when you can fund only one project.
6 min read
Profit vs cash flow: why a profitable company runs out of money
Profit vs cash flow explained: why the P&L and the bank disagree, how a profitable year can end with an empty account, and how to close the gap early.
6 min read
Sunk cost vs relevant cost: what to ignore when you decide, with a worked example
A sunk cost is spent whatever you decide, so it never belongs in a decision. How to find the relevant costs and the opportunity cost, with an example.
6 min read
Working capital and DSO: how payment terms eat your cash
Working capital and DSO explained: why sales on payment terms tie up cash, what net 60 really costs, how to price it, and how DSO spots late payers.
8 min read
Product activation: activation rate, the aha moment and how to find it
What product activation is, how to calculate user activation rate and how to find your aha moment in your own data without falling for selection bias.