Business process

A business process or business method is a collection of related, structured activities or tasks that produce a specific service or product (serve a particular goal) for a particular customer or customers. It often can be visualized with a flowchart as a sequence of activities with interleaving decision points or with a Process Matrix as a sequence of activities with relevance rules based on the data in the process.

Source: http://en.wikipedia.org/wiki/Business_process

Related Links
http://www.businessballs.com/business-process-modelling.htm
http://en.wikipedia.org/wiki/Business_process_modeling
http://en.wikipedia.org/wiki/Business_process_management
Business Process Modeling using BPMN Diagrams