At the XP 2004 Customer Panel, Angela Martin said that in most projects she had interviewed, the XP Customer was massively overworked. Sometimes they were working 80 hours a week.
A couple of strategies for overworked Customers:
1. This is a demanding full time job. Do not try to do it on top of another job.
2. Focus on coaching rather than writing documentation. It is a much more effectively and efficient means of transferring knowledge.
3. Get a business coach to help out. The business coach can help with structure and get the most out of the Customer's precious time.
4. Pair on the learning (analysis). If this requires writing up. Get the other person to do it.
5. Appreciate that anyone who understands the question can answer it. Get someone else, ideally a member of the development team, to resolve the issues that arise out of the learning sessions.