After last week’s supplier resin changeover (Lot 24-1107), our ASTM D638 tensile Cpk fell from 1.74 to 1.21 across three consecutive runs (n=30), still within spec but short of our internal 1.33 capability target. MSA on the Instron shows 9.8% R&R, so this doesn’t look like measurement error. Would you re-baseline control limits now or keep the current limits and temporarily increase sampling per ISO 2859-1 until the process proves stability?