In SAP Field Service Management, business rules are used to automate processes. Custom fields, like standard fields, can be referenced in three main logical components of a business rule:

1. Variables: You can define a variable within a business rule and assign it the value of a custom field from the trigger object or a related object for later use.

2. Conditions: The core logic of a business rule resides in its conditions. Custom fields can be used here to evaluate their value as part of an IF statement to determine whether the rule's actions should be executed.

3. Actions: If the conditions are met, the rule performs actions. A common action is to set or update the value of a field, and this includes custom fields on the trigger object or other related objects.

B. Object type: This setting defines the business object the rule applies to (e.g., Service Call), making its fields available, but it is not a section where a specific custom field is directly referenced.

C. Permissions: Permissions relate to user authorization and security roles within the system. They are not a component of a business rule's logical structure where fields are referenced.

1. SAP Help Portal

SAP Field Service Management

"Business Rules": This document outlines the fundamental structure of a business rule

stating

"A business rule consists of a trigger

conditions

and actions." This establishes Conditions and Actions as core components where field data is manipulated.

Reference: SAP Field Service Management > Administration > Business Rules.

2. SAP Help Portal

SAP Field Service Management

"Create Business Rules": This guide details the user interface and steps for creating a business rule. It explicitly shows separate configuration sections for Conditions

Variables

and Actions

all of which provide interfaces for selecting and referencing object fields

including custom fields.

Reference: SAP Field Service Management > Administration > Business Rules > Create Business Rules > Sections "Define Conditions"

"Define Variables"

and "Define Actions".