Final answer:
RTY, or Rolled Throughput Yield, is a Six Sigma process performance measure that calculates the likelihood of a process producing defect-free units. It is calculated by multiplying the yields (defect-free rates) of all steps in the process, and a low yield in any step can significantly reduce the overall RTY.
Step-by-step explanation:
RTY, or Rolled Throughput Yield, is a metric commonly used in Lean Six Sigma and other process improvement methodologies to measure the probability of a process producing a defect-free unit. It takes into account the yields of each individual process step and calculates the compound effect of these yields on the overall process yield. By multiplying the yields of all the process steps, one can determine the RTY.
To calculate RTY, you first need to identify the yield, or the percentage of defect-free products, for each step in the process. After computing these individual step yields, you multiply them together to get the RTY value. If any single step in the process has a low yield, it can significantly reduce the RTY, highlighting problem areas within the process that may need improvement.
For example, if a process has three steps with yields of 90%, 95%, and 98% respectively, the RTY would be calculated as follows:
- Step 1 Yield: 0.90
- Step 2 Yield: 0.95
- Step 3 Yield: 0.98
The RTY is found by multiplying these together:
RTY = 0.90 * 0.95 * 0.98 = 0.8379 or 83.79%
This means that 83.79% of all units would pass through the entire process without any defects assuming there were no chances for rework or repair.