Quality Six Sigma

Builds a binomial acceptance-sampling plan with its operating characteristic curve, producer and consumer risks and average outgoing quality. Use it to design or check a lot inspection plan.

Computes X-bar and R control limits from your subgroups using derived control-chart constants, and flags out-of-control points. Use it to set up a control chart from sample data.

Scores failure modes by severity, occurrence and detection to a risk priority number, with a severity gate for high-harm modes. Use it to rank and triage risks in an FMEA.

Runs a Gage R&R measurement-system analysis by ANOVA, reporting repeatability, reproducibility, percent study variation and the number of distinct categories. Use it to judge whether a gauge is adequate.

Computes the process capability indices Cp, Cpk, Pp and Ppk against your specification limits, with the estimated defect rate. Use it to judge whether a process meets its tolerance.

Converts between defects per million opportunities, yield and sigma level, including the 1.5 sigma shift. Use it to express process performance on the Six Sigma scale.