OUESTION $1$:

a$)$ What are the two types of variation found in a manufacturing process? marks$)$

b$)$ What are important factors in process control? $(5$ marks$)$

c$)$ Summarize the benefits and uses of Statistical Process Control. $(5$ marks$)$

d$)$ What is the difference between specification limits and control limits$?(5$ marks$)$

e$)$ Explain the possible causes of different out$-$of$-$control indicators. $(5$ marks$)$