Guides

A histogram shows the distribution shape of your measurement data. Learn how to read histogram patterns, spot problems, and use them for SPC in TofuPilot.

Cpk and Ppk both measure process capability, but use different standard deviations. Learn when to use each, what the gap reveals, and compare them in TofuPilot.

Ppl and Ppu measure long-term process performance against individual spec limits. Learn the formulas, how they relate to Cpl/Cpu, and track them in TofuPilot.

Cpl and Cpu measure process capability against individual spec limits. Learn the formulas, when to use one-sided indices, and how TofuPilot displays them.

Pp measures long-term process spread relative to spec width using overall standard deviation. Learn the formula, compare Pp to Cp, and track it in TofuPilot.

Ppk measures long-term process performance using overall standard deviation. Learn how it differs from Cpk and how TofuPilot tracks both.

Cp measures how much of the spec window your process variation uses, ignoring centering. Learn the formula, how Cp relates to Cpk, and read it in TofuPilot.

Cpk measures whether your process produces units within spec limits, accounting for centering. Learn the formula, thresholds, and how TofuPilot tracks it.

SPC uses production test data to separate normal variation from real problems. Learn the core tools, how they connect, and how TofuPilot automates SPC.

IQC, IPQC, FQC, and OQC are quality control stages in manufacturing. Learn what each covers and how to track quality data with TofuPilot.