Interactive Tools
Functional demonstrations of Quality Engineering principles and Data Analysis logic.
Functional demonstrations of Quality Engineering principles and Data Analysis logic.
Calculate sample sizes and acceptance criteria based on ANSI/ASQ Z1.4 (General Inspection Level II).
Determine if a process is capable of meeting specifications (Target Cpk > 1.33).
Calculate Defects Per Million Opportunities (DPMO) and approximate Sigma Level.
Compute center line and upper/lower control limits for an X̄ (means) chart from process mean and standard deviation.
Estimate measurement system variation: Repeatability (EV), Reproducibility (AV), and %GRR (AIAG-style).
Calculate sample size to estimate a proportion with a given margin of error and confidence level.
Operating Characteristic curve: probability of acceptance vs. true defect rate for a single sampling plan (n, c).
Risk Priority Number = Severity × Occurrence × Detection (1–10 each). Use for FMEA prioritization.
Upper and lower control limits for an R (range) chart from average range R̄ and subgroup size n. Use with SPC.
Convert between defect rate (%), PPM (parts per million), and approximate sigma level. Same basis as DPMO with 1 opportunity per unit.