Process models are only used to document the current system (that is,the "as-is" system),since that is the system the users know and is the system that will be modified.

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Process models can also be used to document and design future systems (that is, the "to-be" system), which may be different from the current system. The purpose of process modeling is not limited to just documenting the current system, but also to identify areas for improvement and provide a roadmap for implementing changes.

Process Models Are Only Used to Document the Current System