How to apply the Activity Centered Design model [on hold]

I'm struggling to understand the application of Activity Centered Design (ACD) to real world UX problems. Specifically …

• How do you apply Activity Centered Design as a means of innovating on a product?
• What is the process of discovering the activities of a given user?

I'm looking for a documented framework for putting the requisite procedures into action. Things like the flow of interviews, types of metrics, and parties that should be involved, etc.