When should you choose data-driven testing in Ranorex?

Data-driven testing is the right call whenever the same sequence of steps needs to be verified against several different inputs, and writing a separate test case for each input would just be copy-pasting the same logic with different values.

A login test that must be checked against valid credentials, an invalid password, an empty username, and a locked account is a classic case: the clicks and fields are identical every time, only the data and expected outcome change.

It is less useful when each scenario actually needs different steps or different validations, not just different values - in that situation, separate test cases (or a code module with real branching logic) communicate the intent more clearly than forcing everything through one data table.

The practical signal to watch for is duplication: if two test cases differ only in the values typed into the same fields, that is the point to convert them into one data-driven test case bound to a data source instead of maintaining near-identical copies.