What's your course update process?

I've seen this handled different ways. The "best" approach really depends on the amount and impact of the change, how frequently changes are made, ands how the courses are assigned. 

For example, suppose there's a course about how to use a specific piece of software. If there's a major change in one part of that software, you might rush a "delta" course to users that describes only that change. Then update the overall software course for its next release, so that new employees will be trained on the updated software. (There's no need for them to know "how it used to work.")

I'd also suggest doing a thorough needs analysis that also looks at how often given "core" topics change. That might give you better ways to divvy up the topics. For example, a topic that frequently needs updates could be put on its own in a shorter course, rather than having it within a longer course in which the other content is fairly stable.

Bottom line: It depends!  😄