Business processes are typically organised into a three-level hierarchy to manage complexity and provide a clear line of sight from strategy to execution. The standard levels, moving from the highest to the lowest level of detail, are:
Enterprise (or Value Chain): The highest level, showing the core business functions (e.g., "Sell Product," "Develop Product").
Event-Response (or End-to-End): The mid-level, showing the process triggered by a business event and concluding with an outcome (e.g., "Handle Customer Order").
Actor-Task (or Detailed/Procedure): The lowest level, showing the individual steps and actions taken by the actors to complete a process (e.g., "Check stock availability," "Package item").
Therefore, the three key levels that define this breakdown are Enterprise, event-response, actor-task.
(Reference: BCS Modelling Business Processes / BCS Business Analysis Practice – Business Process Hierarchy)
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