Many CRM applications include sales pipeline tracking and sales workflow. Generally, when a new opportunity is created, one has to somehow enter the 'expected revenue' for the deal. This is easy for product and one-off service sales, it is simply the total of all products and services for the deal.
The question I have concerns subscription based services. When selling something that has a monthly recurring revenue, what value should be entered as the 'expected revenue' for the opportunity? Is it the revenue for one month, one year, or something else?