AMA: Oracle Director of Product, Oracle Cloud Infrastructure, Devika Nair on Product Vision

I wouldn't think so. Your vision isn't something that's measurable or track-able in the near time, and hence user testing is hard. Its more likely to want to validate the market feasibility for your vision statement.

I like to think of the vision to be at least a 5 year plan.

It can take anywhere from a few goals to multiple weeks. In addition to the thought that goes into it, its important to align stakeholders to your vision and this can add time to this task.

Ideally the vision statement never changes. Practically, it makes sense to revisit when you: (1) are close to achieving your original vision, (2) when there are significant events that impact your product direction. Its likely something that happens every few (4-5+) years not every year.