Guides

Learn how to calculate first pass yield (FPY), why it matters for manufacturing test, and how to track it automatically with TofuPilot.

Build and run a hardware test in Python in 15 minutes using OpenHTF and TofuPilot, with measurements, limits, and automatic data logging.

A structured comparison of Python and LabVIEW for manufacturing test automation, with cost analysis, feature comparison, and real migration considerations.

A complete guide to PCBA functional testing (FCT) with Python, OpenHTF, and TofuPilot, covering power rails, communication, current draw, and traceability.

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.

Learn why test data jurisdiction matters for manufacturing companies and how to protect process parameters and yield data from foreign surveillance laws.

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.