[eckesicle]

My thoughts on this matter:

1. Start with defining the problem you want to solve and identify the stakeholders. Then meet each stakeholder 1-1 and get approval.

2. Propose an API. Then meet 1-1 again for approval.

3. Make a high level arch diagram. Seek approval again.

4. Proceed with actually writing the design doc and begin the formal and official review.

Points 1-3 could be done in a week if planned well and will make the design doc a lot less controversial and get you through the review process quicker