Earned value management is only as good as the supporting systems used to measure progress. Identify at least three problems that could lead to inaccurate progress management. Also, provide an example...

Earned value management is only as good as the supporting systems used to measure progress. Identify at least three problems that could lead to inaccurate progress management. Also, provide an example of an alternative to Earned value that you might use should project progress reporting systems prove to be inadequate.