Due to the high importance of cash in running a business, it is in a company's best interest to collect outstanding receivables as quickly as possible. By quickly turning sales into cash, a company has the chance to put the cash to use again - ideally, to reinvest and make more sales. The DSO can be used to determine whether a company is trying to disguise weak sales, or is generally being ineffective at bringing money in. For most businesses, DSO is looked at either quarterly or annually.