Quality Control
A study of the visual inspection of small integrated circuits found that the modal duration of eye fixations of trained inspectors was about 200 msec. The most accurate inspectors made the fewest eye fixations and were the fastest. When the same chip was judged more than once by an individual inspector the consistency of judgment was very high whereas the consistency between inspectors was somewhat less. Variation by a factor of six in inspection speed led to variation of less than a factor of two in inspection accuracy. Visual inspection had a false positive rate of 2% and a false negative rate of 23%
Read more about this topic: Visual Inspection
Famous quotes containing the words quality and/or control:
“As the quality of water changes with the nature of the soil;
So will a man’s reason vary with the quality of his friends.”
—Tiruvalluvar (c. 5th century A.D.)
“The basic tool for the manipulation of reality is the manipulation of words. If you can control the meaning of words, you can control the people who must use the words.”
—Philip K. Dick (1928–1982)