What is a business rule in ServiceNow?

Question

Sadika · Accepted Answer

In ServiceNow, a business rule is a set of automated instructions that are executed when a record is displayed, inserted, updated, or deleted. Business rules in ServiceNow allow you to define custom logic and behavior to automate various processes within the platform. They are written using JavaScript and can be applied to a specific table or globally to multiple tables.

Here are key aspects and use cases for business rules in ServiceNow:

Trigger Events:
- Business rules are triggered by specific events on records, such as when a record is inserted (before or after), updated (before or after), deleted, or displayed.
Conditions and Actions:
- Business rules consist of conditions and corresponding actions. Conditions determine when the rule should be executed, and actions define what should happen when the condition is met.
Scope:
- Business rules can be scoped to a specific table, making them applicable only to records in that table, or they can be defined globally, affecting multiple tables. This allows for flexibility in applying rules based on business requirements.
Server-Side Execution:
- Business rules execute on the server side, ensuring that the logic is enforced consistently and securely. They are written in JavaScript and have access to the Glide API (Application Programming Interface) provided by ServiceNow.
Use Cases:
- Business rules are commonly used for a variety of purposes, such as:
  - Field Validation: Checking and validating data entered into specific fields.
  - Auto-population of Fields: Automatically filling in field values based on certain conditions.
  - Security Checks: Enforcing security measures based on user roles or conditions.
  - Workflow Automation: Triggering workflows or other actions based on record changes.
  - Data Transformation: Modifying data before it is stored or displayed.
Client Scripts vs. Business Rules:
- While client scripts are used for client-side (browser) actions, business rules operate on the server side. Business rules are typically used for more critical and secure operations, while client scripts may be used for user interface interactions.

Here's a simple example of a business rule in pseudocode:

javascript

// Business Rule When: Before Insert If: current.priority == "High" Then: current.comments = "This is a high-priority request." // Explanation // This business rule triggers before a record is inserted. // If the priority field is set to "High," it adds a comment to the record.

Business rules play a crucial role in customizing and automating processes within ServiceNow, allowing organizations to tailor the platform to their specific needs.

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What is a business rule in ServiceNow?

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