This means they are taking much longer to collect debts on that credit. This lower number may mean that Big 5's collection process has worsened or that it has been selling to customers with financial difficulties. The overall days outstanding ratio increased by 48.39% over the 10-year period. They averaged 2.6x DSO (Day Sales Outstanding) in 2005 and 4.3x DSO in 2014. This means it takes them almost 2 days longer on average to collect their accounts