EWMA Control Chart

Example 1

Summary: Generate an Exponentially Weighted Moving Average (EWMA) Control Chart using the Quality Control platform.

Code:

// Open data table
dt = Open("$Sample_Data/Quality Control/Clips2.jmp");
// EWMA Chart
EWMA Control Chart(
    Y( :Gap ),
    Subgroup( :Date ),
    Use Overall Mean for Target( 1 )
);

Example 2

Summary: Generate an Exponentially Weighted Moving Average (EWMA) control chart for monitoring quality control metrics.

Code:

// Open data table
dt = Open("$Sample_Data/Quality Control/Clips1.jmp");
// EWMA Chart
EWMA Control Chart(
    Y( :Gap ),
    Subgroup( :Sample )
);

Example 3

Summary: Create an Exponentially Weighted Moving Average (EWMA) Control Chart for monitoring the temperature variable over time subgroups in the Quality Control/Quench dataset.

Code:

// Open data table
dt = Open("$Sample_Data/Quality Control/Quench.jmp");
// EWMA Control Chart of Temp
EWMA Control Chart(
    Y( :Temp ),
    Subgroup( :Time stamp )
);