Every architecture assessment reaches the same question. You have a list of integrations, and you need to know which ones are risky. On a recent engagement the list ran to dozens. The question is never "are these risky." It is "which ones, and can you prove it."
Most teams answer this by judgement. An architect looks at each integration, thinks about it, and assigns it a risk level. It works, in the sense that you get an answer. The problem is that you get a different answer depending on who looks, when they look, and how much coffee they have had. Hand the same list to two architects and you get two risk registers. Hand it to the same architect twice and you often get two as well.
That is not an assessment. That is an opinion with a spreadsheet.
The deterministic alternative is to stop asking humans to judge and start asking defined rules to classify. Each integration carries a small set of factual attributes. Does it move personal data. Does it move financial data. How is it triggered. How many systems does it feed. What method does it use to move the data. None of those are matters of opinion. They are facts you can read off the integration.
Once the attributes are facts, the classification becomes a function of the facts. A rule says: if an integration carries personal data and feeds more than one downstream system, it escalates. Another says: if it moves financial data on a real-time trigger, it escalates further. The rules are fixed, written down, and applied the same way every time. Feed the same integrations in, get the same classification out. Every time.
People hear "rules" and assume rigidity, as if judgement is being thrown away. The opposite is true. The rules encode the judgement once, carefully, with a reason, and then apply it consistently. The expertise goes into writing the rule, not into re-litigating every integration from scratch. A human can still override a classification, but the override is recorded, with a reason, so it is visible rather than silent.
The speed is a by-product, not the point. Yes, a defined ruleset classifies dozens of integrations in the time it takes to read them. That is nice. But the value is not that it is fast. The value is that it is reproducible. If a client challenges a classification, you can show them the rule, the inputs, and the logic. If a regulator asks why an integration was treated as high risk, the answer is a numbered rule and a documented fact, not "the architect felt it was."
That reproducibility is what makes an assessment defensible. An opinion cannot be defended, only asserted. A rule can be pointed to, questioned, and relied on.
Here is the test I apply to any classification method. Run it twice on the same inputs. If it gives you two different answers, the method is broken, no matter how experienced the person running it. A methodology that depends on who holds the pen is not a methodology. It is a personality.
Deterministic classification is not about removing people. It is about making sure the answer belongs to the method, not the mood.