"Examples:" "For example, if a heating and air conditioning equipment manufacturer views itself in the temperature control business, then it could decide to sell climate control for a building rather than just mechanical devices. It could charge per cubic foot of climate maintained on a monthly or annual basis and/or through a payment plan involving gain sharing, in which costs are reduced as system performance rises, thus benefiting financially both the firm and the customer. A seller entering into such an arrangement has an incentive to look at everything about the building that will influence heating and cooling costs."