Page 11 - Yellow Belt Six Sigma
P. 11
Exercise σ? Enrollment
To calculate the percentage error rate, we can use the formula:
Percentage error rate = (Number of errors / Number of
opportunities) x 100%
In 2022, University X received In this case, the number of opportunities is the total number of
6,000 applications for Step 1: Percentage error rate = (Number of applications received, which is 6,000. The number of errors is
given as 1,000.
admission. The university errors / Number of opportunities) x Percentage error rate = (1,000 / 6,000) x 100% = 16.67%
100%
prides itself on its ability to Step 2: To calculate the sigma level, we can To calculate the sigma level, we can use the Six Sigma table
apply six sigma improvement use the Six Sigma table which shows which shows the number of defects per million opportunities
methodologies and has the number of defects per million (DPMO) for each sigma level.
opportunities (DPMO) for each sigma
reduced the application error level. (Plain English: Step 1 X 1,000,000) Based on the percentage error rate of 16.67%, the DPMO
would be: DPMO = 16.67% x 1,000,000 = 166,700
rate to 1,000. What is the Step 3: Use a Six Sigma table to find the
percentage error rate and process sigma. You will look for the According to the Six Sigma table, a DPMO of 166,700
number closest to 166,667
corresponds to a sigma level of approximately 2.4 sigma.
what six sigma level would under defects per 1,000,000. This means that the University X has been able to significantly
that equate to approximately. reduce the error rate in its application process, but there is still
room for improvement. By continuing to use Six Sigma
methodologies and tools to identify and eliminate the root
causes of errors, the university can strive towards a higher
sigma level of quality and further improve the application
process.
