Here's my workflow, hopefully concise enough as a reply, in case helpful to those very few who'll actually see it:

Research -> Define 'Domains' -> BDD -> Domain Specs -> Overall Arch Specs / complete/consistent/gap analysis -> Spec Revision -> TDD Dev.

Smaller projects this is overkill. Larger projects, imho, gain considerable value from BDD and Overall Architecture Spec complete/consistent/gap analysis...

Cheers