Business Process Testing deals with the testing of end to end or business
workflow of an application. The concept of BPT was in existence long before HP introduced in their Test management tool Quality Centre. This technique can be used to develop manual and automated components. There are accelerators provided by HP for applications like SAP, Siebel etc. This technique will help companies to reduce the cost and time required for test case construction and automation. I have tried this myself and was convinced with the concept and its implementation.