Exam-style Questions: Production Control

1. A graph representing a statistical process control chart for the production of gnomes.

a) What are the functions of lines x and y shown in the control chart and how are they set?

b) What recommendation would you make if you saw the results shown in the chart?

c) How are control limits likely to be affected by the size of the sample taken and the variability of the production process?

d) Explain whether or not ideas of TQM have had an effect on statistical quality control techniques?

(Marks available: 20)

Answer

Answer outline and marking scheme for question: 1

Give yourself marks for mentioning any of the points below:

a) Upper and lower action and warning limits.

Standard Deviation (usually)

y = 2

and

x = * 3

(5 marks)

b) Alarm bells would start to ring. There is an upward trend away from the base.

(5 marks)

c) The larger the sample size the more accurate the outcome.

The more consistent the production run, again the more accurate the outcome, for example identifying problems.

(5 marks)

d) TQM is a concept which involves all workers within an organisation.

TQM is more concerned with continuous improvement in all company processes whereas statistical control of quality is concerned with control of processes and their resulting outcomes.

(5 marks)

(Marks available: 20)

2. 'Kaizen' is defined as continual improvement involving a commitment from everyone in the company.

a) How might kaizen improve customer satisfaction?

b) Does kaizen eliminate the need for market research?

(Marks available: 10)

Answer

Answer outline and marking scheme for question: 2

Give yourself marks for mentioning any of the points below:

a) Kaizen is continuous improvement and product quality should therefore be continually improving. Through the removal of defects and waste, cost should be reduced and therefore prices may fall. Customers get high quality, low price goods.

(5 marks)

b) No. Market research is required to identify customer needs and the situation in the competitive marketplace. Market research enhances kaizen.

(5 marks)

(Marks available: 10)