Maintaining and Controlling Projects

How does EVM operationalize or put into practice the management of trade-offs implied by the triple constraint discussed since the beginning of the course? Does it allow a balanced appraisal of all three parameters? Why or why not?

EVM has become especially popular as a mandatory contractual reporting methodology between contractors and vendors in very large projects. But it has come under attack in some circles. What would the two sides of the argument be?