First time yield (FTY)

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    ​First time yield is a metric used to determine how a process is performing in relation to the number of good parts or services it produces. The metric is more specifically used to measure the ratio of parts made correctly the first time through.  First time through yield can help gauge whether or not a cell is making parts correctly the first time through. The first-time yield can be calculated by dividing the number of good, conforming products or services by the total number of products or services produced in the sample lot or batch.  First time yield is also referred to as first pass yield.

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