Throughput yield (YTP) is the number of good units that are produced divided by the total number of units that go into each step of the process. Throughput yield considers the amount of scrap and rework in a process.
When you calculate throughput yield, you count only the units that make it through the process without rework or scrap.
Rolled throughput yield (YRT) is the probability that a single unit can pass through the entire process without defects. You can multiply the individual throughput yields at each process step to obtain the overall, rolled throughput yield.
When you calculate throughput yield, you count only the units that make it through the process without rework or scrap.
Using the example above, YRT = YTP at step 1 * YTP at step 2 * YTP at step 3.
So the rolled throughput yield for the label process is 0.95 * 0.84 * 0.88 = 0.70. Overall, of the 1000 labels that entered the process, 700 labels are acceptable (700/1000 = 0.70).