Process capability indications are important tools use to measure with a manufacturin process meets specified requirements. In ISO 9001 compliance, understanding and d calculating in these indicets helps ensure quality and d proces controll.

Understanding Process Capability Indices

De kan kun sammenlignes med de særlige forhold, der gør sig gældende, hvis de giver en talmæssig værdi af de pågældende forhold.

Steps to Calculata Process Capability Indices

Beregningsmetode for de enkelte trin:

  • Gatherdata from thee process overse en bestemt periode.
  • Beregner disse process mean (average) og d standard deviation.
  • Identifiy the upper and d lower specificiate ation limits (USL and d LSL).
  • Use the formulars fr Cp and d Cpk to o compute the indices.

Formularer til cability- indicier

Disse former er følgende:

1; FLT: 0; Cp = (USL - LSL) / (6 × standard deviation)

1; 1; FLT: 0; 3; Cpk = min; 1; (USL - mean) / (3 × standard deviation), (mean - LSL) / (3 × standard deviation)

Ensuring ISO 9001 Compliance

Regelmæssige beregninger og kontrol af proceskabiliteten viser, at proceskravene er stabile og kvalitetskrav.