I published a guide on How to correctly estimate time for a project. 

If your team struggles with estimates,
If you think estimates are useless,
If your developers always underestimate and your releases are late,
If you bid for fixed budget projects, 

This guide is for you. Happy to answer any questions.

https://medium.com/@maximetopolov/how-to-correctly-estimate-time-for-a-project-a2add63f030b