The scenario you described closely resembles an adaptive methodology. In adaptive methodologies, the process is iterative and involves a cycle of feedback and revisions, much like how your friend gathers your preferences, makes alterations, and seeks your input on the garment until it meets your satisfaction. This type of approach contrasts with predictive methodologies, where the requirements and design are typically defined upfront without the possibility of significant changes throughout the process.
So the correct response is adaptive methodology.