The present disclosure concerns the hierarchical splitting of large datasets by multi-level segmentation and providing a system and method for enabling requests of reuse of the values of previously estimated nodes of said hierarchy. This is applied in making connections between different suppliers in a complex hierarchical multi-level chain of purchase items, facilitating the communication of request for quotes and respective responses. The disclosure allows higher level bidders to traverse dense hierarchical multi-level chains of purchasing data, re-using existing estimates and quotes, allowing quicker processes and more efficient use of resources.The system comprises a Request for Quote module (RFQ Module), an estimate module (Estimate Module) and a Request for Quote reply module (RFQ Reply Module), and a module for storing and/or communicating existing estimates and quotes (Rides Module) across hierarchical levels in the purchase process.