STATS 134-B

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6. When attributes charts are used when _______

a) Destructive testing is required

b) Process must be continuously stabilized and monitored for its capability

c) Historical summary of process performance is needed

d) Existing process but in chronic trouble

7. When there is a need to reduce acceptance-sampling or other downstream testing to a minimum when the process can be operated in-control, which type of control charts should be preferred?

a) Attributes control chart

b) Variable control chart

c) Both can be used

d) None of the both types can be used

8. Which of these does not require SPC implementation?

a) When Specifications change without notice

b) When customer demands both control and capability

c) When process is stable

d) When the process is estimated to reduce its capability in near future

9. When it is inconvenient to obtain more than one measurement per sample output of any process, which of these is the best choice?

a) x bar and R charts

b) x bar and s charts

c) c-charts

d) Control charts for individuals

10. Which of these should be carried out if the process is in-control and capable?

a) SPC only

b) Experimental design

c) Change process

d) Investigate specifications

11. Computer should not be used with SPC.

a) True

b) False

1. Which of these is a condition where attributes control charts should be used?

a) New product manufacturing from existing process

b) Troubleshooting a out-of-control process

c) When it is necessary to reduce process fallout

d) Change in product specification is required

2. When the process is a complex assembly operation, and the product quality can only be judged in terms of occurrence of nonconformities, the ______ are more helpful.

a) OnlyxCharts

b) R-charts

c) s-charts

d) p-charts

3. When process needs to be controlled but the measurement data cannot be obtained, the control charts to be formed are _____________

a) p-charts

b) OnlyxCharts

c) s-charts

d) R-charts

4. When there are very tight specifications, overlapping assembly tolerances problems, which of the control charts are used?

a) Attributes control charts

b) Variables control charts

c) Both, attributes control charts and the variables control charts can be used

d) Neither one of attributes or variables control charts can be used

5. When destructive testing is required, which type of control should be used?

a) p-chart

b) c-chart

c)xAnd R charts

d) u-charts