Information about logic for calculating customer delinquency status

Hi Everyone,

I am looking out for information about the logic which is being used to calculate the customer delinquency status which is displayed in collections header. My requirement is to add a column of Status in UWQ so that we can sort it for delinquent & pre delinquent customers.IEX_DELINQUENCIES_ALL stores the information about status at invoice level. However a customer might have multiple invoices some of which could be delinquent and some could be pre delinquent. In this case the status of customer is calculated as delinquent. I am looking out for this logic so that I can use standard logic