What type of control chart would you use to control the following process? Why? (2 mark)

Lot number

Number inspected

Number of units outside specifications

1

1050

26

2

685

53

3

139

32

4

72

23

5

210

30

(b)What type of control chart would you use to control the following process? Why? (2 mark)

Lot number

Rolls of cloth produced inspected

Number of defects

1

40

28

2

40

29

3

40

28

4

40

30

5

40

30

(c) A production analyst takes 12 samples of jelly beans from production over a shift period. The number of minor defects in each sample is shown below.

Sample

Number of defects

1

6

2

6

3

5

4

8

5

6

6

5

7

5

8

3

9

7

10

3

11

4

12

6

Develop the appropriate control chart for this process. Does the process appear to be in control? Why? (6 marks)

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