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2.76.1 Specifying Input Data for SPC Tools

1 Introduction
2 Specifying Input Data
3 Setting up Specifications and Parameters
- 3.1 Single Variable
- 3.2 Multiple Variables

Introduction

This chapter guides you through selecting measurement data, handling subgroup structures, and applying specification limits—such as Lower Specification Limit (LSL), Upper Specification Limit (USL), and Target values—across different data layouts for the SPC tools

Specifying Input Data

Select the options in Input tab of the dialog according to how your data arranged

Data Arrangement	Options to specify
One dataset	Select All Subgroups in a Single Column radio box Specify the data in columns as Measurement Data Enter 1 in the Subgroup Size box Note: If you have data with subgroups and each subgroup size are the same, you can also use this option and set a proper value for the Subgroup Size
All Subgroups in a Single Column	Select All Subgroups in a Single Column radio box Specify the data in columns as Measurement Data Specify the column with group info to be Subgroup Size Column'
Each Subgroup in a Separate Row If the columns have different data size, right click on the row header of last row and select Set as End to push all the column having the same size	Select Each Subgroup in a Separate Row radio box Specify data in multiple columns as Measurement Data Select Subgroups Arranged in Rows Across Columns check box

Data Arrangement

Options to specify

One dataset

Select All Subgroups in a Single Column radio box
Specify the data in columns as Measurement Data
Enter 1 in the Subgroup Size box

Note: If you have data with subgroups and each subgroup size are the same, you can also use this option and set a proper value for the Subgroup Size

All Subgroups in a Single Column

Select All Subgroups in a Single Column radio box
Specify the data in columns as Measurement Data
Specify the column with group info to be Subgroup Size Column'

Each Subgroup in a Separate Row

If the columns have different data size, right click on the row header of last row and select Set as End to push all the column having the same size

Select Each Subgroup in a Separate Row radio box
Specify data in multiple columns as Measurement Data
Select Subgroups Arranged in Rows Across Columns check box

Setting up Specifications and Parameters

Origin provides flexible methods for entering specification limits in the Input tab and the historic parameters in the Parameters tab

Single Variable

Enter a number

The value applies to all variables or groups

Enter values in header rows

The values stored in header rows are applied to the corresponding columns.

Enter name range and project variables

If you have defined named range or project variables for the specification limits or historic parameters, you can enter them directly into the specification fields.