I'm looking for published case studies or research on how a UX team can approach a full site redesign with an Agile dev team.
Specifically, I'm looking for examples that go through what foundational work the UX and UI team might do before a line of code is written in the first sprint.
I've been in Agile projects on both sides of the Aisle (both UX and Dev) but these were mostly all in your typical 'enhance over time' situations where the initial site was already there to work upon.
What I'm thinking needs to happen is that UX needs to have some time to work on a foundation of visual design, UI patterns, interactions, along with all the usual work (flows, personas, etc.) before it makes sense to have dev begin sprint 1. Is that a fair assumption? Does anyone know of any documented examples of such a process?
A simple example of a concern I have is dev may split up site features on a sprint-by-sprint basis. But all site features will need to share a common UI layer of HTMl, CSS and JS that likely needs to have some foundational work done prior, as you wouldn't want to end up with entirely separate HTML and CSS for each individual component.
I realize that not all UX teams are also UI teams, so, alternatively, I'd also be interested in any documented process that includes the UI construction process separate from UX.