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Make the list answer a service decision
For an overseas equipment owner, an operational technology (OT) asset inventory is a record of the devices and connections used to run the customer’s physical process. It should help a qualified team identify exposure, missing support and which changes need customer approval.
The National Institute of Standards and Technology (NIST), in its final Revision 3 guidance, describes hardware, software/firmware, vendor and responsibility information in asset management. It cautions that some automated discovery methods may affect OT operation; the customer’s qualified team should choose how to verify the record. This is not an instruction to scan a live plant.
Three sold items can depend on five support assets
Fictional example: your quotation lists a controller, motor drive and operator touchscreen. The intended support route also needs a communications gateway and an engineer’s laptop. Listing only the three sold items leaves two important dependencies unexamined.
The gap does not prove a vulnerability. It tells management that it cannot yet describe the whole support route or its cost. Confirm the actual installation with the customer before adding an access promise.
| Item to verify | Why the owner needs it |
|---|---|
| Device identity and exact location | Prevent advice being applied to the wrong machine. |
| Software/firmware and support status | Identify versions the support supplier can actually service. |
| Connection and system owner | Establish whose approval and information are needed. |
| Vendor/support dependency | Identify an account, licence or supplier that can delay the job. |
| Last verification and changes | Show whether the register still describes the installed system. |
Keep network exposure and approved design distinct
This inventory shows the assets and connections present. A configuration baseline answers a different question: which engineering drawings, settings and software versions were approved for that installation? Link the two records rather than expecting one spreadsheet to settle both.
For each material unknown, assign an evidence request, a person and a decision date. A reseller’s product brochure can identify a model family; it is weaker evidence of the software currently running at the site.
Quote the support you can describe
If the gateway belongs to another supplier or the installed software is outside your support capability, price the investigation or narrow the service scope first. Avoid treating an empty inventory cell as zero work. Refresh the record after approved additions, removals or version changes.
Scope
- This is an inventory-preparation method, not a vulnerability scan, system security certification or determination under the DOJ data programme. Actual technical and customer requirements remain separate.
Next step
Keep the verified asset register in an authorised operating system. Use Launch dependencies to assign the missing site evidence, approval and responsible person before remote support begins.
Sources & review notes
National Institute of Standards and Technology
Passage, dates and research notes
official-guidance · Sections 6.1.1,6.2.4.3,6.2.10–11 and 3.3.8–9; printedpp 91,112–113,122–125 and 42–43
Scoped sections of the September 2023 final were read. The current landing page identifies Revision 4 as an initial public draft, not a replacement final. Voluntary guidance; actual system, safety, contract and sector requirements need their own assessment.
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