---
alias: user-guide-spc-we3
description: "This document defines a rule based on centerline deviations for scope resolution"
---

# Western Electric 3

## Rule definition

4 of 5 consecutive points above one standard deviation or below one standard deviation on the same side of the centerline.

## Rule Scope

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

Table: Western Electric 3 configuration used for scope resolution

## Visual examples

### Upper

![Western Electric 3 - Upper][N6_WE3_indicator1_upper]

### Lower

![Western Electric 3 - Lower][N6_WE3_indicator1_down]

[N6_WE3_indicator1_upper]: images/N6_WE3_indicator1_upper.png
[N6_WE3_indicator1_down]: images/N6_WE3_indicator1_down.png