Match the following Control Charts Rules and$/$or patterns with the corresponding correct statement of process conditions.

Question $24$ options:

Represent smaller shifts that are maintained over time.

Occurs when you have multiple processes but you are including all the processes in a subgroup. This can lead to the data "hugging" the average $$ all the points in zone C with no points beyond zone C$.$

This is often called "tampering" with the process. Adjusting a process that is in statistical control actually increases the process variation. For example, an operator is trying to hit a certain value.

Represents a process that is trending in one direction. For example, tool wearing could cause this type of trend.

Represent sudden, large shifts from the average. These are often $$ a one$-$time occurrence of a special cause

Occurs when you have more than one process present and are sampling each process by itself. For example, you might be taking data from four different shifts. Shifts $1$ and $2$ operate at a different average than shifts $3$ and $4.$

$1.$

Rule $1($one or more points beyond the control limits$)$ and Rule $2($zone A test: $2$ out of $3$ consecutive points in Zone A or beyond$)$

$2.$

Rules $3($Zone B: $4$ out of $5$ consecutive points in Zone B or beyond$),$ and Rule $4($Zone C: $7$ or more consecutive points on one side of the average $-$ in Zone C or beyond$)$

$3.$

Rule $5(7$ consecutive points trending up or trending down$)$

$4.$

Rule $6($Mixture $-8$ consecutive points with no points in Zone C$)$

$5.$

Rule $7($Stratification $-15$ consecutive points in Zone C$)$

$6.$

Rule $8($Over$-$control $-14$ consecutive points alternating up and down$)$