1. ServiceNow Product Documentation - State model and transitions for Change Management: "The Change Management state model allows you to customize the change process by modifying or adding states and defining the rules for moving between states... The state model functionality is available by default for Normal
Emergency
and Standard change models." This document details how state flows (smstateflow table) define the sequence of states for a specific model.
2. ServiceNow Product Documentation - Change Management - State Model: "The Change Management - State Model plugin (com.snc.change.statemodel) is activated by default. This plugin enables you to customize the change process by modifying or adding states and defining the rules for moving between states." This confirms the feature is a core
named plugin for this exact purpose.