Rule Checker(AT&T_WE) VI
- Updated2024-11-20
- 3 minute(s) read
Applies AT&T/Western Electric run rules to the input points array. Given a set of control chart points and the center line and std error from the control chart computations, this VI will check whether points are out of control (or non-randomly distributed) according to the rules enabled. The front panel below shows which rules can be enabled. The rules that are violated along with the first point and length of the sequence of points are output.
Inputs/Outputs
rule 4a/4b
—
(Boolean) - selects rule 4a or 4b. 
points
—
points contains the points plotted on the control chart, which normally is the output of one of the control chart VIs, such as an x-bar array. 
center line
—
(DBL) - the center line from the control chart.
std error
—
(DBL) - the standard error associated with the center line (CL) from the control chart. 
rule enable
—
rule enable specifies the run rules to apply to the points array. Each element of the array corresponds to a rule 1, 2, 3, 4 from element 0 to 3, in that order (see front panel for rule explanation). Set the corresponding element to TRUE for each rule you want to apply. (An easy way to do this from the diagram is to use an unsigned 8-bit integer, set the appropriate bits, and then use the number for binary array conversion.) 
rule violations
—
rule violations lists the rules being violated and which sequence of points violated the rule.
out of control points
—
points contains the points plotted on the control chart, which normally is the output of one of the control chart VIs, such as an x-bar array. |
Rule
—
first point
—