====== Case studies: delivered systems, written for a reader ======

This namespace holds sanitised write-ups of systems AEI Corporation has
actually delivered — what the machine or network had to do, what was built,
which standards and protocol stacks it used, and what went wrong on the way.
They are written from the raw delivery records, not instead of them: the raw
records stay internal and are never published.

Client names are never used. A case study describes the engineering — the
topology, the cycle budget, the standard and edition, the failure mode and its
fix — and identifies the customer only by industry and machine type.

===== Available =====

//None published yet.// The namespace and its sourcing rule are settled; the
individual write-ups are not yet written. First candidates, both derived from
records already held:

  * **Secure OPC UA PubSub over TSN demonstrator** — S2OPC with security on a TSN-scheduled network, shown at a trade fair.
  * **OPC UA to MQTT cloud connector** — bridging a plant-floor OPC UA server to an IoT cloud agent, including the certificate-signing and MQTT keep-alive problems solved along the way.

===== Related =====

  * [[industries:start|Industries]] — the same work indexed by buyer.
  * [[use-cases:start|Use cases]] — indexed by function.
  * [[technology:start|Technology overview]] — the depth behind these systems.