How do we communicate fit adjustments after the first sample?

Upon receiving the first prototype, clients provide a fit feedback report (using photos or a marked-up Tech Pack). Our pattern makers use this engineering data to adjust the digital CAD files—for example, modifying the inseam length or waist tension. We then produce a 2nd Pre-Production Sample (PPS) using the bulk fabric to verify all corrections before the 100-piece bulk manufacturing begins.