Measure

Question 1

What is the question that will be answered in Measure?

Answer 1

“How big is the problem?” and we will demonstrate this with facts and data

Question 2

What is the tool 2?

Answer 2

It is the output measurement matrix, and it is the correlation between the potential measurements in the process and the fulfilment of the CTC

Question 3

What are the two data types?

Answer 3

Discrete and Continuous

Question 4

What is the sample size for discrete data?

Answer 4

n=100

Question 5

What is the sample size for continuous data?

Answer 5

n=30

Question 6

In the MSA Gage, how many readings do I need for discrete data?

Answer 6

30 readings, 4 times, per operator (1 operator) = 120 total

Question 7

In the MSA Gage, how many readings do I need for continuous data?

Answer 7

10 readings, 2 times, per operator (2 operators) = 40 total

Question 8

What type of graph can we use for discrete data at a specific point in time?

Answer 8

-Pareto Chart
-Bar Chart
-Pie Chart
(page 114 in the book)

Question 9

What type of graph can we use for continuous data at a specific point in time?

Answer 9

-Histogram
-Box plot
(more on page114 in the book)

Question 10

Which capability key-figure is from the customer’s view?

Answer 10

ppm, because it considers the defective parts (what the customer can see “good/bad” part)

Formula:
ppm = ((# defective parts)/(total parts))*10^6

Question 11

Which capability key-figure is from the business’s view?

Answer 11

DPMO, because it considers the individual defects from each part.

Formula:

DPMO = ((defects)/(#total parts Opportunities))10^6

Question 12

What is the DPU formula?

Answer 12

DPU= individual defects / #total parts

Question 13

Mention the capability key figures

Answer 13

Yield, RTY, ppm, DPMO, DPU, Cp and Cpk

Question 14

if my value for the Cp or Cpk equals less than 1.3, this means…

Answer 14

That the process is not capable. I want at least a Cp=1.3 or more. (or Cpk)

A Cp = 2 is excellent (or Cpk)

Question 15

What is the difference between Cp and Cpk?

Answer 15

Cp compares the spread between the process and the limits only.
Alt. answer: Cp compares the standard variation to the given tolerance.

Cpk compares the spread to what I really need
Alt. answer: Cpk compares how “centered” is the process regarding the given customer specification limits

Question 16

What are the capability measures used for continuous data?

Answer 16

Cp and Cpk

Question 17

What are the capability measures used for discrete data?

Answer 17

DPU, ppm, DPMO, Yield and RTY

Question 18

What are some factors that can influence the data collection?

Answer 18

-Man
-Machine
-Method
-Material
-Measurement
-Mother Nature

Question 19

When can I use MSA Type I?

Answer 19

I can use MSA Type I with continuous data, and Man processes

Question 20

When can I use MSA Type II?

Answer 20

I can use MSA Type I with continuous and discrete data, and Machine processes

Question 21

When do you use gage R&R?

Answer 21

With the MSA Type II, can be used with continuous and with discrete data

Question 22

What are the requirements for a good measuring system?

Answer 22

-Accuracy
-Stability
-Linearity
-Granularity
-Repeatability
-Reproducibility

Question 23

What is the target result for my Cp and Cpk?

Answer 23

Cp >=1.33
Cpk >=1.33

The bigger the values the better is the process

Question 24

What are the pre-requisites for MSA Type I?

Answer 24

1 part for inspection
1 operator
30-50 measurements
1 gage

Question 25

When testing MSA Type I for accuracy, what is the desired result?

Answer 25

Xbar (mean) - Xreference = 0

Question 26

When testing MSA Type I for accuracy, in Minitab, the P-value result is 0.2247, what does this mean?

Answer 26

That there is no Bias, my MSA type I is accurate

Question 27

When testing MSA Type I for accuracy, in Minitab, the P-value result is 0.0322, what does this mean?

Answer 27

That the Bias is not 0, my MSA Type I is not accurate

Question 28

What is the formula for the Cg (Capability of Gage)?

Answer 28

Cg=(0.20*tolerance)/(6*S)

Question 29

What is the parameter number to decide if my gage is capable, based on the result of Cg?

Answer 29

If Cg is > 1.33, then my gage is capable.

Question 30

What can I test on my MSA Type I?

Answer 30

Accuracy of gage and capability of gage

Question 31

What are the pre-requisites for MSA Type II?

Answer 31

10 parts for inspections 2 operators 2 measurements per part per operator 1 gage Operational definition

Question 32

What can I test on my MSA Type II?

Answer 32

I can check for: Contribution, Tolerance, Study Variation and number of categories.

Question 33

On the MSA Type II, what are the deciding parameter numbers for Contribution results?

Answer 33

If Contribution is < 1% good If Contribution is > 9% bad

Question 34

On the MSA Type II, what are the deciding parameter numbers for Tolerance results?

Answer 34

If Tolerance is < 10% good If Tolerance is > 30% bad

Question 35

On the MSA Type II, what are the deciding parameter numbers for Study Variation results?

Answer 35

If Study Variation is < 10% good If Study Variation is > 30% bad

Question 36

On the MSA Type II, how many categories should you have?

Answer 36

5 or more distinct categories.