Core tool video: Test of Understanding Process Capability - Exide Technologies

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Question 1 of 10

1. A histogram:

Defines the process capability

Shows how the process capability changes over time

Shows the shape, spread and location of a group of data

Shows the trends in the data when compared to control limits

Question 1 of 10

Question 2 of 10

2. A capability index gives information on:

How well the process is centred

How variable is the process

What is the probability of producing conforming parts

All the above

Question 2 of 10

Question 3 of 10

3. What is standard deviation?

Standard deviation is the degree of variation with the control limits

Standard deviation is another term for process capability

Standard deviation is a simple measure of the variability or dispersion of a population, a data set, or a probability distribution

Has to be a minimum of 1.33

Question 3 of 10

Question 4 of 10

4. Capability index Pp:

Gives an indication of the location of the data when compared with the upper and lower specification limits

Is calculated based on the true standard deviation

Is calculated based on an estimate of standard deviation

Is used to calculate the control limits

Question 4 of 10

Question 5 of 10

5. Capability index Cp:

Gives an indication of the location, spread and shape of a data distribution

Is calculated based on the true standard deviation

Is calculated based on an estimate of standard deviation

Gives an indication of special causes

Question 5 of 10

Question 6 of 10

6. For Ppk:

Calculates the position of the mean of the data is compared with upper and lower specification limits

The minimum value must be 10

The process must contain special causes

The calculation only checks the spread of the data, not the location

Question 6 of 10

Question 7 of 10

7. For a process capability of 1, what would be the probability in terms of PPM defects?

1 ppm

2700 ppm

33 ppm

2 ppm

Question 7 of 10

Question 8 of 10

8. A typical acceptance value for Ppk is:

1.33

1.67

1.0

Question 8 of 10

Question 9 of 10

9. Process capability should be calculated:

When special causes are present

When more than 7 points are consistently increasing

When all special causes have been removed and the process is stable

After any equipment calibration has been performed

Question 9 of 10

Question 10 of 10

10. Process capability should be understood by:

Every employee within the organization

Those involved in the collection and analysis of statistical data

All the Top Management team

Only personnel working in the quality department

Question 10 of 10

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Core tool video: Test of Understanding Process Capability – Exide Technologies