Object oriented design strategies and patterns are applied to financial data processing systems for processing and modeling of financial products with an emphasis being on derivative products. A hollow aluminum handle provides a first handle opening at the bottom and a second handle opening at the top. The server is further configured to create an on-hand inventory profile which comprises a set of pairs, stored in a linked list within a data structure involving nested buckets, wherein the on-hand inventory profile points to an empty link list when first created and store the on-hand inventory profile in the database. The service agent may in turn apply a set of service logic based at least in part on the information, so as to derive a service treatment, and the service agent may send a signaling message so as to cause an enforcement engine to carry out the service treatment.