On the 80/20 rule that isn't one – and on the fact that the part which gets cut first is the part that decides how the product turns out. The short version: "The first …

One year after the BFSG: what companies actually did, what would have worked – and why the fine is the weakest argument of all. The short version: Germany's Accessibility Strengthening Act has applied since …

On bureaucratic language, legalese and jargon in interfaces – and why being incomprehensible doesn't protect you legally, it voids your clauses. The short version: Around 20 percent of adults in Germany sit at the …

Why a difficult cancellation process isn't a retention measure – it's a right of immediate termination for your entire customer base. The short version: In Germany, a cancellation button has been mandatory since 1 …

On confirmation pages, status emails and reminders – the last mile of your product, the one nobody in the project owns. The short version: Everything that happens after the click on "buy" or "submit" …

The most expensive sentence in your product – and why bad error messages aren't sloppiness, they're an interest payment that rises every year. The short version: Error states hit exactly the people who were …

On B2B applications and internal tools – the two kinds of software whose users can't walk away. And why that isn't a licence, it's an open flank. The short version: Bad B2B software doesn't …

Why your field count and your default values decide more about revenue than any redesign ever will. The short version: The form is the checkout counter. You've hidden it behind a door that sticks. …