An architecture diagram can describe services, databases, integrations and infrastructure clearly. It cannot show every manual workaround, unclear ownership boundary or operational constraint that affects the real system.
Those details matter because technology is operated by people and, in many businesses, connected to physical processes. A technically sound design can still create poor outcomes when deployment is fragile, support knowledge sits with one person or a workflow depends on repeated manual intervention.
Follow the work
Speaking with the people who build, support and use a system often reveals more than another diagram. The useful questions concern how changes reach production, how incidents are diagnosed, where information is re-entered and which problems teams have learned to work around.
Connect software to operations
For connected products and manufacturing environments, the review may also need to consider devices, networks, embedded software, installation and field support. These are part of the product even when they sit outside the core software estate.
A review becomes actionable when it joins the technical model to the way the business actually works.