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AI agent or workflow automation: which do you need?
How to tell whether a process needs an AI agent or plain workflow automation, based on how predictable the inputs are and how much judgment the work takes.
Start with the inputs, not the technology
Look at what arrives at the start of the process. If it is structured and predictable, such as a form submission, a new row in a database or a payment event, rules can usually handle it. If it is free text, scanned documents or requests phrased a hundred different ways, you need something that can interpret language. That difference matters more than any tool choice.
Use rules when the decision can be written down
If a person can write the decision as "when X happens, do Y", workflow automation is the cheaper and more reliable choice. It is easier to test, easier to explain to an auditor and behaves the same way every time. Many processes that look like AI problems are really integration problems: data trapped in one system that needs to reach another.
Use an agent when the work needs interpretation
An AI agent earns its place when the step involves reading, classifying, summarising or drafting, for example sorting support tickets, extracting fields from contracts or preparing a first reply. The agent handles the variety in the input. Its output should still land in a structured form that the rest of the workflow can check.
Most good systems combine both
In practice the strongest designs use automation for the predictable plumbing and an agent only for the step that needs judgment. The workflow fetches the data, the agent interprets it, and the workflow validates the result, routes it and records what happened. This keeps the AI part small, testable and easy to swap out later.
Questions to answer before you build
How often does the process run, and what does a mistake cost? Who reviews the output, and how quickly? What data can the system read, and what can it change? Answering these first tells you whether you need an agent at all, how much human review to keep, and how you will know the system is working after launch.