A guide to estimating percentage complete and remaining time.I haven't looked at the problem. Completed: 0% Time esimate: about 2 weeks.I've looked at the problem. Completed: 50% Time estimate: about 2 more weeks.I've implemented almost everything. All that remains is the difficult stuff that I don't really know how to do. Completed: 90% Time estimate: about 2 more weeks.I've done everything.