My firm is making a big deal of "We're going agile/scrum" as of the start of the year. I'm not sure I quite understand how it makes sense. From my personal pe

My firm is making a big deal of "We're going agile/scrum" as of the start of the year. I'm not sure I quite understand how it makes sense. From my personal perspective, the sprint model is an okay idea if you're working greenfield, or at least in full control of your deliverables. I'm wondering how it fits into any sort of dev process where third parties are involved. For the same conceptual change, some will be "send us an email with the ID from the test API call you made, and we'll tell you if it looks right" taking a few hours. Others will demand a huge stack of formal test cases, weekly meetings, and a cycle time of two weeks to even get back what they didn't like about your test requests. How do you possibly slice that into two week intervals?