// max expected number of unpaid services 0-<<requesterm, requester1, requester2, requester3>> R{"unpayed"}min=? [F "finished"] // max expected fraction of unpaid services 0-<<requesterm, requester1, requester2, requester3>> R{"ratio"}min=? [F "finished"] // max expected cost of services <<requesterm, requester1, requester2, requester3>> R{"cost"}min=? [F "finished"]