I've just now discovered the tag methodology. It's associated with only 8 questions, and it has no tag wiki. Not only does the name sound like it could be off-topic, but the lack of a wiki really doesn't help. Stack Overflow has the same tag with a wiki, and it may help with deciding on this:
A methodology is usually a guideline system for solving a problem, with specific components such as phases, tasks, methods, techniques and tools.
Another piece of evidence is two (now-deleted) old questions that were only using this tag. One was more fitting for Programmers SE, and the other just contained pseudocode. The remaining 8 questions are unlike these, though. But that tag still doesn't fit with them nor with the site.