Yield and quality control

Which technique varies several process conditions (temperature, time, gas flow and so on) simultaneously and systematically to efficiently determine each factor's effect with few experiments?

  1. ADesign of experiments (DOE)
  2. BPareto chart
  3. CFive whys
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Answer: A. Design of experiments (DOE)

Design of experiments uses tools such as orthogonal arrays to systematically choose combinations of factor levels, statistically evaluating each factor's effect and interactions between factors with few experimental runs. It is widely used to optimize process conditions.

  • A. Correct. Planned experiments efficiently determine factor effects.
  • B. A Pareto chart sorts items to find priorities.
  • C. Five whys digs into root causes.
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More Yield and quality control questions

  1. What is the system called that monitors equipment sensor data (temperature, pressure, power and so on) during processing, detects unusual states and flags abnormalities early?
  2. Which metric evaluates equipment productivity by multiplying the fraction of time running, the performance (speed) and the good-product rate?
  3. In a semiconductor fab, what is the time from wafer start to completion called?
  4. 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?
  5. 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?