You can use this app to perform a step-by-step analysis by looking at different key performance indicators (KPIs) from different perspectives. As a corporate controller, you will want to analyze days sales outstanding (DSO). DSO is a measure of the average collection period, that is, the average number of days that a company takes to collect on its accounts receivable. Therefore, analyzing DSO helps to manage your company’s efficiency in collecting outstanding receivables and to define measures to increase the availability of cash.