Key Formulas and Math Concepts Flashcards
Average of the data
Mean
The most frequently occurring value in a distribution of data
Mode
The mid-point, or 50th percentile, of a distribution of data
Median
a measure of variation or dispersion of values in your data
Standard Deviation
First Time Yield (FTY) =
Total Units Passed divided by Total Units Tested
Calculate how much work passed through each step without rework (yield for each step) and multiply yield for all steps
Rolled Throughput Yield (RTY)
1.What is the Median of the set of data given here?
2, 5, 6, 9, 8, 5, 7
a) 6
b) 7
c) 2
d) 9
a) 6
When calculating the yield of your process with consideration of the amount of rework that was needed, you would use…
a) Defects Per Million Opportunities (DPMO)
b) First Time Yield (FTY)
c) Defects Per Unit (DPU)
d) Rolled Throughput Yield (RTY)
d) Rolled Throughput Yield RTY
Total Number of Defects divided by Total Number of Units
Defects Per Unit (DPU)
Total Number of Defects divided by Total Number of Opportunities for Defects to Occur
Defects Per Opportunity (DPO)
Total Number of Defects divided by Total Number of Opportunities for Defects to Occur X 1,000,000
Defects Per Million Opportunities (DPMO)
In any process improvement endeavor, the ultimate objective is to make the process…
Better, Faster, Cheaper
