Problem $1$

Design engineers have arrived at a product design configuration through the use of engineering science

principles, which often results in the designer specifying the target values for the critical design parameters.

What is the name of this specified limit$?$

A manufacturing process produces $500$ parts per hour. A sample part isselected about every half$-$hour,

and after five parts are obtained, the average of these five measurements is taken. The quality engineer of

this manufacturing process wants to specify a limit for process monitoring for these measurements. What

is the name of this specified limit$?$

For a manufacturing process, the quality characteristic of individual product is the main issue for each

individual customer. The quality characteristic has a normal distribution with mean $$ and standard deviation

$.$ And then the limit of $\backslash$pm $3$ is specified for each individual product, what is the name of this specified

limit$?$