Yield and quality control

Which metric evaluates equipment productivity by multiplying the fraction of time running, the performance (speed) and the good-product rate?

  1. AOEE (overall equipment effectiveness)
  2. BTOC
  3. CCMRR
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Answer: A. OEE (overall equipment effectiveness)

OEE (overall equipment effectiveness) multiplies the fraction of time a tool is running (availability), its actual speed relative to its ideal speed (performance) and the fraction of good output (quality). It shows where losses lie and is used to improve equipment.

  • A. Correct. It multiplies availability, performance and quality.
  • B. TOC stands for theory of constraints or total organic carbon in ultrapure water, neither of which fits here.
  • C. CMRR is the common-mode rejection ratio of a differential amplifier.
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More Yield and quality control questions

  1. In a semiconductor fab, what is the time from wafer start to completion called?
  2. Which control chart monitors shifts in a process's mean and changes in its spread at the same time by plotting each sample group's mean and range (max − min) over time?
  3. Which system manages which lot is at which step and tool, under what conditions it was processed and so on, directing and recording the production flow in a factory?
  4. In sampling inspection, which judges an entire lot as accepted or rejected by inspecting a sample, which metric expresses the quality level considered acceptable?
  5. When analyzing yield data, which example correctly illustrates that "a correlation between two quantities does not mean one causes the other"?