Ideas for eLearning based on understanding the roles of workers

The answer depends on how often this flow changes. If every month you change up the roles/responsibilities an updated chart is probably better. But if it is somewhat stable you can create a "build your own workflow" interaction with roles, responsibilities, inputs and outputs. Basically, let users experiment with putting the right people in the right place to do the right thing. When it is not, the character can tell about the consequences. For example, an approver of some form can say unless I have XYZ form filled out correctly, I can't approve production. You can make this as simple as "interviewing" roles and how they're stuck because of others to a simulation depending on time and budget.