Vol. 9, No. 2

February 2007

PQ Systems
 
Contents

Analyze wear trend, customize icons in GAGEpack

Quality Quiz: With a video!

MSA with Jackie Graham

Data in everyday life

Bytes and pieces

FYI: Current releases

 

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Software

 

   

Quality Quiz:

Click here for a more complete video explanation

Hyde N. Sikh, head of operations at Blackern Dirt Mining Company, is considering purchase of a new excavator system created by Deep Core Values, Inc. He has agreed to a trial use of the giant digger, in order to ascertain whether it will affect the total cost of mining at his operation.

As the trial period comes to a conclusion, Sikh brings data gathered by chief engineer, Foss L. Fyuel, to Polly Yurathane, quality manager, for analysis.

DAY

Total cost

Tons of coal mined

Type of excavator used

1

3

1

5

2

4

3

5

3

6

4

5

4

7

5

5

5

6

6

5

6

2

1

10

7

2

3

10

8

3

4

10

9

4

5

10

10

5

6

10

Polly approaches regression analysis for this data with some trepidation, but forges ahead regardless, announcing that she will rate the old excavating system as a 5, and the Deep Core machine as a 10, and then pursue multiple regression.

Since setting up the regression is one key to accurate analysis, it is critical to determine whether Polly’s approach will provide the desired comparison of the two machines with respect to their impact on the larger process. Has Polly organized the data in such a way that it will generate reliable analysis?

a) Yes. Assigning a value of 5 and 10 for the two machines will help to distinguish their impacts;

b) No. Polly’s arbitrary decision will not facilitate reliable analysis.

 

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