[cjk]

> "We can commit to a date and we'll finish whatever we finish by then, or we can commit to a scope and it will take as long as it takes. But we won't commit to a date and a scope unless we spend the up front time to first figure out every detail of what we need to build."

This.

I often find myself saying “you can be feature-driven, or you can be date-driven, but not both.”