Common use of Process Stability and Capability Clause in Contracts

Process Stability and Capability. a. Identify the criteria for performing process capability studies and describe how and when these studies are applied. Describe how the process capability index is calculated and include the frequency of these calculations. Describe what actions are taken as a result of each process capability study. Describe the contractor's methodologies when process capability is for variable and attribute data. To determine a capable process, the process/operation parameters shall meet the following requirements: (1) Variable Data. Process capability (Cp) shall be determined. Process performance index shall be greater than or equal to 1.33 (Cpk). For critical parameters/characteristics, the process performance index shall be greater than or equal to 2.0 (Cpk). (2) Attribute Data: Process capability/performance shall be the percent beyond the upper/lower specification limit less than or equal to .003 percent (Cpk=1.33). b. Describe what actions will be taken if process/operation is sub-marginal or marginal. (Cpk less than 1.33 or 2.0 for criticals) or grand average fraction defective is greater than .003 percent). c. Include analysis of statistical distributions and define all formulas and symbology utilized.

Process Stability and Capability. a. Identify the criteria for performing process capability studies and describe how and when these studies are applied. Describe how the process capability index is calculated and include the frequency of these calculations. Describe what actions are taken as a result of each process capability study. Describe the contractor's methodologies when process capability is for variable and attribute data. To determine a capable process, the REFERENCE NO. OF DOCUMENT BEING CONTINUED PAGE 12 OF 40 CONTINUATION SHEET PIIN/SIIN W52P1J-05-C-0015 MOD/AMD NAME OF OFFEROR OR CONTRACTOR: VALENTEC SYSTEMS INC. process/operation parameters shall meet the following requirements: (1) Variable Data. data: Process capability (Cp) shall be determined. Process performance index shall be greater than or equal to 1.33 (Cpk). For critical parameters/characteristics, the process performance index shall be greater than or equal to 2.0 (Cpk). (2) Attribute Datadata: Process capability/performance shall be the percent beyond the upper/lower specification limit less than or equal to .003 percent (Cpk=1.33Cpk = 1.33). b. Describe what actions will be taken if process/operation is sub-marginal or marginal. marginal (Cpk less than 1.33 or 2.0 for criticals) criticals or grand average fraction defective is greater than .003 percent). c. Include analysis of statistical distributions and define all formulas and symbology utilized.