This step needs to figure out the “Who is Doing What?”.
Project workstreams will help you to segregate the action items in groups and to know who is in charge of what (action owner).
Actions items (also called “To-Dos”, “Actionable Steps”, “Tasks”) can be breake down in sub-action items if necessary (e.g. for complex action item).
A project workstream could be as an example Regulatory, Design & Development or Marketing.
For the Regulatory Workstream, action items could be as an example Preparation of the Technical Documentation, Review of Labeling, Creation of the Intended Use.