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All 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Word Description
Zone A Industry standard statistical zone. Range between 2 and 3 standard deviations from your process mean. The outer bound(s) of Zone A is/are your control limit(s).
Zone B Industry standard statistical zone. Range between 1 and 2 standard deviations from your process mean.
Zone C Industry standard statistical zone. Range between 0 and 1 standard deviations from your process mean. The inner bound(s) of this zone is your process mean.

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