Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
16 Cards in this Set
- Front
- Back
|
when do you use a crossed gage r&r study?
|
same parts are tested by different operators
|
|
|
what is a gage r&r study?
|
it's a tool used for MSA, it can be used to analyze measurement system variation
|
|
|
when do you use a nested gage r&r study?
|
same parts are tested only by one operator
|
|
|
what is repeatability?
|
repeatability presents the chance that the same operator is measuring the same part with the same result
|
|
|
what is reproducibility?
|
reproducibility presents the chance that a different operator is measuring the same part with the same result
|
|
|
what do you look for when performing a gage r&r study
|
%Contribution (of VarComp) should be less than 1% but not higher than 9%
%StudyVar should be lower than 10% but not higher than 30% |
|
|
how do you analyze a measurement system with variable data?
|
using a gage r&r study (nested or crossed)
|
|
|
how do you analyze a measurement system with attribute data?
|
using attribute gage study or attribute agreement analysis
|
|
|
what are the two possibilities for data sampling? (MSA)
|
population sampling - range oriented sampling
process sampling - process oriented sampling |
|
|
How to determine the sample size for continuous data.
|
Tool: 1-Sample t
sample size - leave empty, that's what we want to know differences: accuracy of the prediction (eg: 1 minute) power values: standard is 0.8 standard deviation: s (eg 2.94) the higher the power value the higher the required sample size will be. |
|
|
How to determine the sample size for discrete data.
|
Tool: 1 Proportion
sample size: leave empty alternative values of p: enter the highest acceptable value of process power values: standard 0.8 hypothesized p: the goal of the process output (eg: 0.1 for 10% error rate) Options: alternative hypothesis |
|
|
What is Modus?
|
the most occuring value of a variable
|
|
|
What is Median?
|
the middle value of a sorted list
odd number of values: the middle value even number of values: the average between the two middle values list of values must be sorted! |
|
|
What is Mean?
|
the average of all values
|
|
|
How to calculate the variance?
|
s²= 1/n-1[(n1-mean)²+...+(nx-meam)²]
|
|
|
How to calculate the standard deviation?
|
s=sqr(1/n-1[(n1-mean)²+...+(nx-meam)²])
or s=sqr(s²) (s²=variance) |
