[derefr]

> Engaged as a service provider or consultant by a larger corporate customer and not authorized to make product decisions yourself?

Then you won't be able to do scrum. You have a waterfall built into your development process: requirements and designs are generated and committed to on the customer side, then "fall down to" the consulting development team.

Scrum (or, really, any methodology that attempts to keep time constant by managing scope) is an iterated conversation between the people who want things, and the people who make things. If the people who want things aren't at the table, you can't have that conversation, and so you can't control scope. Period.