2. Gästföreläsning, Stefano Barone

Question 1

succés of six sigma?

Answer 1

The power of numbers

- dispersion - variation

Question 2

bell curve?

Answer 2

y-axis: represent probability density function (pdf)
x-axis: different scenarios

LSL=lower specification limit in graph (left)
USL= upper specification limit in graph (right)

Question 3

probability

Answer 3

the area under the curve

Question 4

gaussian method?

Answer 4

2 independent parameters:

• my,
• sigma, standard deviation

Question 5

area between minus sigma and + sigma

Answer 5

about 67% (bell shape)

Question 6

area between minus 2sigma and + 2sigma

Answer 6

80%

Question 7

area between minus 3sigma and + 3sigma

Answer 7

99%

Question 8

main parts of six sigma?

Answer 8

• statistical technices
• managerial techniqus
  —> techninces for managers?
  —> can be deterministic
  —> not based on concept of probability
• classification?

Question 9

steps in statistical technology?

Answer 9

1. explore data
2. define and calculate uncertainty
3. model the random variability
4. conclusions from observed data

Question 10

steps in managerial technology?

Answer 10

1. to describe processes
2. manage a project
3. analyse faults
   —> FMEA
4. make decisions