Process control chart was originally known to be introduced by

a$.$

Joseph Juran

c$.$

Walter Shewhart

b$.$ Kaoru Ishikawa

d$.$

Edward Deming

One $(1)$ example of variable data which you may use to plot an $\stackrel{}{x}$ chart in a bank is $,1\mathrm{.}0).$

a$.$ number of complaints received

c$.$ customer queuing time

b$.$ number of spoilt forms

d$.$

none of these

One of the products your company manufactures are $0\mathrm{.}5-$litre plastic mineral water bottles.

The bottles have many important quality attributes such as the volume, height, diameter, label,

colour, non$-$leaking cap, etc.

State clearly one possible quality attribute that can be monitored and controlled using an $x-$

bar chart $(1\mathrm{.}0).$

Explain briefly what you understand about a stable process $(2\mathrm{.}0).$