Hi as i am working on this project all ready i can do it faster , I all ready created a logic to calculate average now need to calculate standard deviation and implement integrate with Apache solr. ,
On freelancer they have good system for for work time watching, from which you can keep watch on project work progress for Hourly Project. I suggest you to use this ,
any ways i also don't have problem with doing work as it is going on all-ready through Fix Priced Projects..