An access sequence is a search strategy that the system uses to find valid data for a particular portfolio type. It consists of one or more accesses, which contains the portfolio table. The system looks for a valid portfolio record according to the order of this sequence. This is assigned to each portfolio type with which you create a portfolio record.

The above figure illustrates the relationship between portfolio type and access sequence. When the system starts to search, it looks for the record to the first table (most specific record). If the record doesn't match the first sequence criteria, it uses the next one. The search continues until the system finds the appropriate record. There is a customizing parameter for optimizing this access.