I'm not sure how to work this one. I think we need to differentiate between business processes (there's already a business-process tag with 8 questions) and process models/methodologies. I don't like the name "development-process", though, since a typical process model covers everything from requirements through end-of-life of a project. I suppose it depends on how you define "development" - it could be the development of a project or it could mean the actual construction/building/development phase of a project. I want to know what the community thinks on this guy, though.
Some manual work to ensure that questions about things that aren't process methodologies (such as this question) aren't rolled into the tag about process models and methodologies, whatever tag that may be. I also do think that process models and methodologies should be grouped into a single tag. An option for this would be to settle on a name for process questions and then make process-model and process-methodology synonyms with that tag.