I'm now doing a test plan for an app total revamp. The testing will include both functional(if it works according to plan, no errors, doesn't break) and usability(if it's intuitive, if the wayfinding is clear, if key actions are clear).
We have a short testing window and it can feel overwhelming as there are so many scenarios to account for.
I'm considering ditching the UX testing and simply do the functional testing as the UX iteration can be done after launch, but if the system doesn't work functionally we can't even launch.
Has anyone been in this situation before? And how did you overcome it? Are there any resources that helped?