Calibration Capability Analysis Categorical Data Cause and Effect Diagram Cause and Effect Matrix CCD Cellular Design Center Points Central Composite Design Central Limit Theorem Central Tendency Certification Champion Changeover Changeover Time CHECK Process Check Sheet Circumscribed CCD Coefficient of Determination (R-Squared) Coefficient of Variation Combined Effects Common Cause Variation Confidence Interval Confidence Level Confounding Conjoint Analysis Constraint Consumer's Risk Continuity Correction Continuous Data Continuous Flow Contour Plot Control Charts Control Limits Control Phase Control Plan COPQ Corrective Action Matrix Correlation Analysis Correlation Coefficient Cost of Poor Quality (COPQ) Cost of Quality (COQ) Covariance Covariate Cp Cpk Critical Region Critical Value Crosby, Philip CTQC / CTQ Cube Plot Customer CUSUM charts Cut-Off Value Cycle Time