> 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-how-it-works/selmo-training/chapter-3-the-advanced-standard-functions-in-selmo/3.8-summary.md).

# 3.8 Summary

The advanced standard functions of Selmo are not add-ons,\
but core components of the system.\
They translate decades of experience into rules\
that are applied automatically:

* **PairCheck** guarantees consistency of conflicting signals.
* **MXIC** regulates safe manual operation.
* **Monitoring** provides diagnostic information.

In combination with the basic operators S and I a system emerges\
that operates deterministically, transparently and safely – without the user having to write additional code.

***

In the next chapter 4 we describe the **PTF principle** (Process – Technology – Function).\
There it is explained how the structure of a SEQ automatically arises from process and technology analysis – and how to build a complete, verifiable machine model from these three steps.


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