Sorry Jeff I disagree. It is the Business's responsibility to justify the expenditure. If they can't understand the value proposition then you should find a new employer. Sales says 'We have to have a complete record of every transaction forever". I tell sales that will cost you xMB/Transaction/Year. How many transactions do you want? That's pretty simple math. Protects me by providing a basis for sizing and makes them justify the cost to the CFO.