Creating a bridge between developer and client could be a good way to increase productivity and keeping the quality of work.
I think Slate Platform able to maintain the quality of the product from the developer and deliver it to the client, so every part of the job getting the best result.
We've essentially automated this process by not allowing payments to be delivered to the developer until the client gives approval of the work. The funds are held in an escrow until the project is complete, and once approved the funds are instantly credited to the developer.