Workflow automation is software that carries a piece of work along a path you can draw. Something starts it. A series of steps follows. Rules decide who, or what, acts. The cases that do not fit have a place to land. Someone can see, later, who did what. If you cannot draw it, you are not automating a workflow. You are hoping.
The happy path is the easy part
A leave request that goes to the right manager. An invoice that waits for a check above a limit. A delivery note that creates a stock movement. On a slide, these are boxes and arrows. In the office, the manager is on leave, the amount is one rupee over the limit, and the note is a photo of handwriting. Those cases are the project. If they fall on the floor, staff invent a WhatsApp group and your automation becomes optional. Optional automation is a hobby.
The longer version of this, with the exceptions and the audit trail, is workflow automation explained. The wider idea, removing the retyping, is business process automation.
Rules first, a model only when the input is messy
If the steps are known and the input is already a form or a status, use a workflow. Do not put a language model in the middle to "be smart" about a rule you could write down. Use a model in front of the workflow when the input is an email, a PDF, or a photo that a person still has to turn into fields. The model proposes the fields. The workflow carries the record. A person sees the ones the model was not sure about.
Automation that spends money, sends a customer a promise, or changes the books needs a stop a human can reach. Speed without that stop is how a bad morning becomes a bad month.
When it matters on a project
It matters when the same handoff happens every day and people are tired of chasing it. It does not matter when the process changes every week and nobody can say what "done" is. Write the path with the person who does the chasing. Include the exception. Then build that, not a platform of empty boxes.
Where the path is really the operating system of the firm, it belongs with the ERP work, not as a side tool that drifts out of date. Where it is one department's queue, keep it small and owned. Either way, the record of the step is the feature. The arrow on the diagram is not.