I have two question regarding the bundle workflow
If I start the workflow on a Bundle , can I add more items to this Bundle.
Can I Lock a bundle which is already in Workflow .
Yes, you can add items to bundle if it's allowed by your current activity definition. In Visio Workflow designer, when creating a process definition you can define behavior for each of the activities. Bundle which is in workflow is already locked, unless other is specified in activity definition.