FT: document how we handle UX improvements tickets (refs: #14544)

wiki/src/contribute/working_together/roles/foundations_team.mdwn

@@ -198,6 +198,46 @@ if at least one of these conditions is met:
    subtasks that will be tackled by different people, and we need
    someone to coordinate the project.
 
+<a id="tasks-management-ux-improvements"></a>
+
+## UX improvements
+
+Our [[UX designers|roles/ux]] maintain a list of UX improvements that
+would be welcome, as tickets related to [[!tails_ticket 14544]].
+
+From time to time, some Foundations Team members meet with UX
+designers and do a value/cost analysis of these tickets. Then, those
+with the best value/cost, that we can work on without waiting for lots
+of UX design work to be done, are added to [our list of
+tasks](https://redmine.tails.boum.org/code/projects/tails/issues?query_id=307).
+That is, working on them automatically qualifies as Foundations Team work.
+
+In general, before looking for other UX improvements we could work on,
+we should first focus on these selected tickets and on the most
+important or urgent of our other [[duties|foundations_team#duties]].
+
+Still, while keeping this in mind, you might personally be
+particularly interested in working on a ticket related to
+[[!tails_ticket 14544]], that was not added to our plate yet.
+This is an option, provided a few conditions are met.
+The Foundations Team lead maintains a list of tickets that meet
+these conditions, in the description of [[!tails_ticket 14544]].
+
+You can check yourself if a particular ticket meets all these
+conditions:
+
+ - It was marked as related to [[!tails_ticket 14544]] by our UX designers.
+
+ - It is possible work on it without waiting for lots of UX work to be done first.
+   To determine whether that's the case:
+    - Look at the "UX" cost column in the spreadsheet attached to
+      [[!tails_ticket 14544]]. A ticket with a UX cost of 2 or more
+      probably does not qualify.
+    - In doubt, ask our UX designers.
+
+ - The P×S/Cdev value is 1.0 or greater, in the spreadsheet that's
+   attached to [[!tails_ticket 14544]].
+
 <a id="contact"></a>
 
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