---
alias: user-guide-spc-we2
description: "This documentation defines a rule based on statistical deviations for scope identification"
---

# Western Electric 2

## Rule definition

2 of 3 consecutive points above two standard deviations or below two standard deviations on the same side of the centerline.

## Rule Scope

| Indicator Scope | Scope Type | Chart Type | Chart |
|-----------------|------------|------------|-------|
| Indicator1      | ChartType  | Variable   |       |

Table: Western Electric 2 configuration used for scope resolution

## Visual examples

### Upper

![Western Electric 2 - Upper][N5_WE2_indicator1_upper]

### Lower

![Western Electric 2 - Lower][N5_WE2_indicator1_down]

[N5_WE2_indicator1_upper]: images/N5_WE2_indicator1_upper.png
[N5_WE2_indicator1_down]: images/N5_WE2_indicator1_down.png