Equations

Question 1

How do you find the mean?

Answer 1

You find the average of a set of numbers

Question 2

How do you find the median?

Answer 2

Find the central location of a continuous data set.

Question 3

What happens if there is an even number when determining the median?

Answer 3

You take the mean of the two middle numbers

Question 4

How do you find the range?

Answer 4

Max minus min

Question 5

How do you find the PPM?

Answer 5

Defects
—————————— x 1 million
number of parts

Question 6

How do you find the yield?

Answer 6

Number of good parts
——————————-
Total number of units

Question 7

How do you find the rolled throughput yield, RTY?

Answer 7

Multiply the yield as many times as requested

Question 8

What is the DPMO?

Answer 8

Defects per million opportunities

Question 9

How do you find the DPMO?

Answer 9

Number of defects
——————————————————- x 1 million.
Number of units X defect opportunities.

Question 10

What is the DPU?

Answer 10

Defects per unit

You have three phones where Phone A has one defect, Phone B has two defects, and Phone C has three defects. This gives us a total of six defects and three total parts/phones.
DPU =6/3=2

Question 11

How do you find the DPU?

Answer 11

Total number of defects
———————————-
Total number of units