> For the complete documentation index, see [llms.txt](https://infosys.selmotech.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://infosys.selmotech.com/selmo-solution/selmo-solution-en/selmo-as-a-process/selmo-digital-twin-process/inputs-for-the-digital-twin-from-the-ptf.md).

# Inputs for the Digital Twin from the PTF

The digital twin can only function reliably if all information from the PTF **complete, consistent and structured** are present.

| PTF area           | Relevant data for the DT                 | Usage                                          |
| ------------------ | ---------------------------------------- | ---------------------------------------------- |
| **Process (P)**    | Process description, states, parameters  | Definition of the logical state machine        |
| **Technology (T)** | Sensors, actuators, interfaces, buses    | Hardware emulation, signal behavior            |
| **Function (F)**   | Function definition, monitors, triggers  | Function logic, simulation of action sequences |
| **PTF-IO**         | Signal addresses, CMZ level              | Connection between control and simulation      |
| **PTF-PARAM**      | Process parameters, limits               | Adjustment of simulation models                |
| **PTF-FUNC**       | Mathematical formulas / logical linkages | Physical or algorithmic behavior               |
| **PTF-RISK**       | known risks / non-conformities           | Prioritization of scenarios to be simulated    |


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