การปรับปรุงค่า - tpa.or.th

1 15for Quality 2014 Trendfor QualityCpk 0 100 (process owner) Cpk February 201416 Trend ?

2 Specification (process capability) Cp (variable data) (specification)Cp = USL Upper Specification Limit LSL Lower Specification Limit d Sigma Standard Deviation (specification) (process capability) Cpl (Lower Specification Limit: LSL) 50 (Kgf.)

3 Cpu (Up-per Specification Limit: USL) Clean Room 100 Cpl = Cpu = X = LSL = USL = 10-12 LSL = 10 mm. USL = 12 Sigma Standard Deviation (SD) (shift) Cpk Cpu Cpl (Cpk= Minimum (Cpu,cpl)) Cp, Cpk (histogram) Specification Cp - Cpk Specification Specifica-tion Cpk Specification - February 201417 Trend Cpk 1 KOV Key Output Variables (KOVs) Key Output Variables (KOVs)

4 KOVs Cpk KOVs (variable) Cpk Specification Cpk 2 Die Mold (sub group) ?

5 Die Mold (Cpk) Cpk <1 Specifica-tion (mold) (product characteristics) 1 3 (calibration) (verification) Mea-surement System Analysis.

6 MSA Gage Repeatability and Reproducibility (Gage R&R) MSA 4 (control chart) KOV (control chart) (realtime) February 201418 Trend Cpk Key Output Variable: KOV 5 Control Chart Control Chart Control Chart Pattern Out of Control Action Plan.

7 OCAP (special cause) 6 Cpk Cp Cpk Cp Cpk (normal curve) 7 Key Input Variable: KIV Key Output Variable: KOV KOV (KIV) KOV (injection temperature) (injection time) (pressure) KOV (KIV) KOV Design of Experi-ment.

8 DOE Test of Hypothesis 8 KIVs (KIVs) Cp, Cpk - (common cause) (special cause) 9 Cpk KIV, KOV Cpk KIV, KOV Trend Line (Deming Cycle) Plan, Do, Check, Action (benchmarking)

9 - KIVs