The key metric of whether you've succeeded is what fraction of your employees use that dashboard everyday.

Your goal over time is to use less red ink every day.

Most people would agree that the details matter when it faces the user. But where the real debate is on things that don't face the user.

Don't accept the excuse of complexity.

Most people will solve the problems they know how to solve. Roughly speaking they will solve B+ problems instead of A+ problems. A+ problems are high impact problems for your company but they're difficult problems.

You kinda want to look for the anomalies. You don't actually want to look for the expected behaviour.

The first thing that editor does is they take out a red pen, or nowadays you go online, and they start striking things. Basically eliminating things, the biggest task of an editor is to simplify, simplify, simplify and that usually means omitting things.