Question :

(a) Discuss the various stages involved in the development and implementation of the quality planning and control activity.

(b) Checking should be carried out at critical points in the production chain. Identify the points where checking should take place.

(c) In a fabric manufacturing plant, inspection of the finished product is carried out at regular intervals. Samples of fabric are taken and the number of defects per square metre are noted. The results are shown in the table below.

(i) Calculate the value of the central line, upper control limit and lower control limit for a C-control chart. ( Use an appropriate formula for the calculation )

(ii) Draw the control chart on graph paper.

(iii) Is the system under control ? Explain your answer.