The document discusses Jenkins workflow and continuous delivery using Jenkins. It describes early Jenkins jobs and techniques for job chaining. Existing plugins for copying artifacts and parameterized triggering are noted but do not survive restarts. The characteristics of workflows that are complex, non-sequential, long-running, involve human interaction and are restartable are outlined. Jenkins workflow is described as being based on Groovy, capturing the entire workflow definition, using familiar control flows and supporting multiple stages, integrated human input, and standard project concepts.