When a customer uses a company's products and services to achieve a goal or need, they are going on a journey from point A to point Z. A customer journey map charts the path a user takes from the beginning of this journey to the satisfaction of that need.
Workshops
Customer Journey Maps — Toptal
Knowledge
Domain Expert Interview — UX Knowledge Base Sketches
Domain Experts / Subject Matter Experts / Industry Experts have invaluable knowledge that you can (and should) apply during your UX process. Domain expert involvement is not an alternative to UX research, and a domain expert is certainly neither a “user expert” nor a designer.
Interviews
Domain Expert Interview — UX Knowledge Base Sketches