If flow logic
Summarize
Summary of If Flow Logic
If flow logic allows you to conditionally execute actions or subflows based on specific criteria from the current record. The flow will only proceed with actions when the defined conditions evaluate to true, enabling targeted automation within your ServiceNow instance.
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Key Features
- Conditional Execution: Actions are executed only when specified conditions, such as task state or urgency, are met.
- Branching Logic: Nested If flow logic blocks can be added to further refine conditions and actions.
- Input Management: Utilize descriptive labels and conditions to enhance clarity and functionality of flow branches.
- Best Practices: Avoid referencing data pill values outside their respective branches, and group similar condition types to avoid unexpected results.
- Decision Tables: Replace multiple If flow logic blocks with a Make a decision flow logic block for streamlined processing of similar conditions, reducing redundancy.
Key Outcomes
By effectively utilizing If flow logic, ServiceNow customers can create efficient workflows that respond dynamically to incidents based on real-time data. This leads to improved task management, quicker response times, and enhanced automation capabilities within your operations.
Selectively apply one or more actions only when a list of conditions is met.
Nested If flow logic blocks
You can add a child If flow logic block to a parent If flow logic block. Add the child If flow logic block to the Then branch of the parent flow logic block.
Inputs
| Input | Description |
|---|---|
| Condition label | Descriptive label for the conditions of branch. A label can be easier to read than a long or complex condition data pill value. |
| Condition | Conditions under which the branch runs. The flow only runs the contents of the Then branch when the conditions evaluate to true. |
Outputs
This flow logic has no outputs.
Perform an action on if an incident has a high urgency
In this example, the action is triggered when the incident record has a high urgency value.
Execution details
- The header shows the state, start time, and runtime for the flow logic.
- The Configuration Details section shows the details about the variables that are used by the flow, including the type, configuration, and runtime values for each variable. Use the condition variable to see if the branch conditions were met.
General guidelines
Use these general guidelines to create effective If flow logic blocks.
- Avoid referring to data pill values outside of the Then branch
- When you set a data pill value from inside a Then branch of If flow logic, the data pill value is only available to other actions in the same branch. Referencing a data pill value that was set inside a Then branch from outside of the flow logic branch produces a null value.
- Group matching condition types in their own condition sets
- Mixing conditions of different types for the same field values can produce unexpected results. For example, adding an AND condition to a group of multiple OR conditions for an incident short description can produce a
situation where the If condition never evaluates to true. Use condition groups to group similar condition types for the same field. For example, group all OR conditions for an incident short description in one condition
set and group all AND conditions for an incident short description in another condition set.
Figure 2. Example of grouping matching conditions into condition sets - Replace multiple If flow logic blocks with a Make a decision flow logic block
- Rather than create duplicate If flow logic blocks that only vary by their conditions, use a decision table to generate an answer. For example, suppose you want to use the incident category to set the assignment group of
an incident task record. Rather than create a duplicate If flow logic block for each category value, use the Make a decision flow logic to provide an answer for the assignment group.
Here is an example flow that uses three If flow logic blocks that each create an incident task record. The only difference between the If flow logic blocks are the conditions of the incident category.
Figure 3. Example of multiple If flow logic blocks that do the same action Here is an example flow that uses a single Make a decision flow logic block to determine the incident task assignment group from the incident category. The Create task action uses the output of the decision as an input.
Figure 4. Example of replacing multiple If flow logic blocks with a decision Here is an example decision table that uses incident record values as an input. The Conditions column consists of two incident category values. The results column consists of the assignment group to use for each condition value.
Figure 5. Example decision table Get Assignment Group from Category