What that looks like in practice.
Take a 15-person product agency in Antwerp, with a running client project around a platform build. Three parties were involved: the agency itself for design and frontend, an external dev shop for the back end, and the client's IT department for the integrations with existing systems. The client had a vague product vision with no internal consensus behind it.
What was going on: back end and frontend argued about who delivers what, the agency lead lost at least half a day every week to coordination calls, and the client didn't know which priority was being set by whom. The agency saw its margin shrinking without the project going any faster.
What we brought in two weeks: a team architecture with clear handover points between disciplines, a one-hour weekly alignment with all three parties at the table, and a plan the client confirmed out loud themselves. From week three, the agency lead had their half day a week back.
And then we were gone: four months later the project was delivered. The agency now continues the approach itself with other clients. Our involvement stopped as soon as it could.