Develop an x chart to determine-the process is stable


Assignment:

Q: A lumber company makes plywood for commercial construction. A key quality measure is the thickness of the plywood. Every two hours, five pieces of plywood (n = 5) are selected, and the thicknesses are measured. The data (in inches) for the first 20 samples are as follows:

Two-Hour Period

Plywood 1

Plywood 2

Plywood 3

Plywood 4

Plywood 5

1

0.642

0.612

0.659

0.691

0.689

2

0.705

0.584

0.644

0.685

0.618

3

0.63

0.599

0.594

0.621

0.628

4

0.586

0.634

0.639

0.656

0.64

5

0.641

0.64

0.693

0.649

0.646

6

0.636

0.713

0.678

0.725

0.631

7

0.703

0.602

0.668

0.679

0.711

8

0.649

0.635

0.672

0.64

0.675

9

0.607

0.625

0.604

0.64

0.65

10

0.652

0.641

0.72

0.597

0.629

11

0.572

0.696

0.612

0.631

0.675

12

0.666

0.679

0.67

0.609

0.617

13

0.673

0.662

0.622

0.644

0.656

14

0.669

0.656

0.623

0.71

0.667

15

0.654

0.677

0.678

0.632

0.623

16

0.686

0.614

0.603

0.674

0.671

17

0.72

0.696

0.692

0.655

0.652

18

0.666

0.651

0.619

0.596

0.677

19

0.665

0.671

0.658

0.62

0.69

20

0.642

0.625

0.626

0.638

0.637

a. Develop an x chart to determine if the process is stable or not.

b. Develop an R chart to determine if the process is stable or not.

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Operation Management: Develop an x chart to determine-the process is stable
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