Product Benchmarks Report (Z.Shift versus Z.Bench)
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Displays another view of the benchmark statistics for the collection of components that are in the product report.

This graph compares the controllability of each component (Z.Shift) and the capability of each component (Z.ST). Typically, Z.Shift values fall within the gray horizontal band (Zone of Typical Control) and Z.ST values fall within the vertical gray band (Zone of Average Technology).

Six Sigma Performance is achieved at high levels of Z.Bench and low levels of Z.Shift.

Z.Shift

·    Low Z.Shift values correspond to characteristics that are very well controlled.

·    High Z.Shift values correspond to characteristics that are poorly controlled.

Z.Bench ST

·    High Z.Bench values correspond to characteristics that reflect technological superiority

·    Low Z.Bench values correspond to characteristics that reflect technological inferiority

In the example above, all components had a Z shift of 1.5 sigma, which is the default when actual Z.Shift values are unknown. About half the components have Z.Bench values in the Zone of Average Technology, while the other half have values to the right, which indicates better than average capability.