Enter your data for Acceptance Xbar-S Chart

Choose Stat > Control Charts > Acceptance Charts > Xbar-S.

First, select the option that describes how your measurement data are arranged. Then complete the steps for the specification limits and acceptance criteria.

In This Topic

All measurements are in one column
Measurements for each subgroup are in a different row
Enter the specification limits and acceptance criteria

All measurements are in one column

Complete the following steps if the measurement data for an Acceptance Xbar-S chart are in one column.

From the drop-down list, select All observations for a chart are in one column.
Enter one or more columns of measurement data. If you enter more than one column, Minitab creates a separate Acceptance Xbar-S chart for each column.
In Subgroup sizes, do one of the following:
- If all subgroups are the same size, enter the subgroup size (for example, 10).
- Enter a column of values that identifies which subgroup each measurement is from.

In this worksheet, Measurements contains the measurement data. Subgroup identifies which subgroup each measurement is from.

C1-T	C2
Subgroup	Measurements
One	10
One	13
One	10
Two	8
Two	8
Two	9

Measurements for each subgroup are in a different row

Complete the following steps if each row in the worksheet contains the measurement data for one subgroup.

From the drop-down list, select Observations for a subgroup are in one row of columns.
Enter the columns that contain the measurement data.

In this example, Measurement_1, Measurement_2, and Measurement_3 contain the measurement data. The data for subgroup 1 are in row 1, the data for subgroup 2 are in row 2, and so on.

C2	C3	C4
Measurement_1	Measurement_2	Measurement_3
10	13	10
8	8	9

Enter the specification limits and acceptance criteria

After you specify how the measurement data are arranged, complete the following steps.

In Lower spec or Upper spec, enter at least one specification limit. If you enter both limits, the lower specification limit must be less than the upper specification limit.
In Accepted percentage outside of each spec limit, enter the maximum percentage of process output that can be outside each specification limit. For example, enter 1 to allow 1% of process output to fall outside a specification limit.
In Probability of intervention if exceeded, enter the probability that a point is outside a control limit when the percentage of process output outside of specification exceeds the accepted percentage. The default is 0.99.