What does ANOVA stand for. and where and how would you use it?
Where would you use project capability studies? and what does it prove
Whats chart should not be used for calculating machine capabilty?
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Analysis of Varience. It tells you if there are any statistical differences between the mean of three or more independent groups. An example where it would be used is by looking at the scrap rate of the same job by three different operators.
An example of where I would use project capability studies is in the evaluation of a new machine I'm ordering. It establishes a state of control over the manufacturing process.
Historical data from a control chart should not be used.
1 Analysis of Variance, I think you could use it measure the variance on the same job ran by two different operators.
2 I would use it to check dimensions at a press forming operation to prove consistencey and capability for meeting manufacturing dimensions.
3 Historical data from a control chart should not be used.
1. ANOVA, Analysis of Variance Method, most accurate method for quantifying repeatability and reproducibility. I would use it on the production line, to check our 32 oz. squeeze bottle caps are properly Heat sealed after the filling process.
2. I would use it to analyze our current gallon bottle turn tables and determine the different sizes between our 3 lines to see if any could be swapped to a more efficient location. (Big table never full- small table filling to quickly). Used to compare the process variation with the engineering or specification tolerances to judge the suitability of the process. The objective is to establish a state of control over the manufacturing process and maintaining that state of control through time.
3. Historical data from a control chart should not be used, other forms of variation may be included in this data. Some authorities state that control charts can be used to determine machine capability if the process is free form drift.