In the second installment of The Beginner's Guide to Revenue Assurance, Rob Mattison tackles the question why do telecoms need revenue assurance at all? "Managers are finding that the methods used in the past, in order to establish control over the accounting, sales, marketing and operational environments simply cannot keep up with today's breakneck pace. The old controls are simply failing." Rob discusses the four symptoms that indicate things are getting out of control, the three key decisions that must be made and four disciplines that drive the revenue assurance process.