The difference
The same week, two ways to plan it
With spreadsheets and shouting
An hour every Monday to agree who does what
Three versions of the same file going around
Budgets visible only at the end of the month
Holidays noticed when someone is missing
With Northwind
A twelve minute Monday meeting, everyone knows beforehand
One plan, always current, on every device
Budgets update with every logged hour
Absences are in the plan before they hurt