earned value management (EVM)

Your company has discovered that it must confront its chronic project cost problems head-on in order to operate profitably. As part of cost control measure, you will use the earned value management (EVM) technique to plan and track performance of the newest set of projects. Your company has determined that project managers must have a deep understanding of cost management. 

Discuss your understanding of EVM using concrete examples.
How does EVM impact project quality?
Describe how you would use EVM to determine whether a project is being completed within budget