Revision problems usually begin long before the first feedback email arrives.
Set expectations early
Clear deliverables, revision limits, feedback windows, and approval stages reduce the chance that a project keeps expanding informally.
Separate fixes from reshaping
Minor adjustments and fundamental direction changes are not the same thing. Treating them differently protects both your time and the client relationship.
Bottom line
A sane revision process depends on good structure at the start, not endless flexibility in the middle.