We use deliverables, milestones, a work breakdown structure (WBS), and statement of work (SOW) contract. These describe the scope, schedule, cost, payment agre

We use deliverables, milestones, a work breakdown structure (WBS), and statement of work (SOW) contract. These describe the scope, schedule, cost, payment agreement, refund policy, etc. http://en.wikipedia.org/wiki/Work_breakdown_structure http://en.wikipedia.org/wiki/Work_breakdown_structure http://en.wikipedia.org/wiki/Statement_of_work http://en.wikipedia.org/wiki/Statement_of_work When we reach a milestone, we invoice the client for the amount we agreed to in the statement of work.