What is the purpose of a Breakdown Source?

A breakdown source defines the complete set of unique, selectable elements for a breakdown. It queries a specified table (the 'Facts table') and applies conditions to generate a distinct list of records. For example, a breakdown source for 'Assignment Group' would be a list of all unique assignment group records. These unique records become the 'breakdown elements' used to filter and classify indicator data.

A. It defines a default elements filter: While it uses a filter, its primary purpose is to generate the definitive list of unique elements, not just a default filter.
B. It specifies which indicators are available to a breakdown: This is incorrect; breakdowns are mapped to indicators, not the other way around via the source.
D. It specifies the options available for non-categorical data: Breakdown sources are primarily used for categorical data (e.g., groups, priorities, states), not continuous or non-categorical data.

- ServiceNow Product Documentation, "Breakdown sources." The documentation states, "A breakdown source is a set of records from a ServiceNow table... Each record from the breakdown source becomes a breakdown element."

- ServiceNow Performance Analytics (PA) Fundamentals courseware, Module: "Breakdowns," Topic: "Breakdown Sources."