I'm not sure what managers have to do with scrum here. A manager is a person that insulates business from the execution on a non-functional level. Perhaps this

I'm not sure what managers have to do with scrum here. A manager is a person that insulates business from the execution on a non-functional level. Perhaps this is a difference in where you work (the company, the culture, the country), but here a manager is just someone who has the job of making sure there are no obstructions and people have what they need and don't get shifted around too much. Priorities are made based in input from owners, users and developers, and cross-functional teams are something that you do in a SIG, not in a development team. Maybe SCRUM (R) as a commercial idea has a lot of things it wants you do to, but that's not really why you'd even consider something; you consider something because it might help you or clarify something for others, and for novices it can be great if you don't have the experience, skills, insight or level of thinking to come up with a self-improving process by yourself.