---
sourceDocument: Yokohama Field Service Management
sourceDocumentLink: https://servicenow-prod.fluidtopics.net/r/yokohama/field-service-management

 Release :

    - yokohama

ft:locale :

    - en-US

ft:publication_title :

    - Yokohama Field Service Management

ft:clusterId :

    - fsm

bundleId :

    - fsm

workflow :

    - Customer and Industry


---

# Mapping a service location to a parent location

# Mapping a service location to a parent location {#ariaid-title1}

Release version: Yokohama  
Updated January 30, 2025  
![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read  
Map a service location to a parent location by setting parent determination
rules.

Parent determination uses a business rule that is stored in the
wm_location_parent_lookup_rule table to map a service location to its
parent location. All service locations are mapped to their corresponding parent location. The
system checks the combination of fields and assigns the parent location to a work order or work
order task.  
Rules are executed in the following order to determine a parent location when a new service location is added:

1. Zip / Postal Code: The corresponding parent location is assigned when a zip code and country values match.
2. Min Zip / Postal Code and Max Zip / Postal Code: When a zip code and country values fall under the defined minimum and maximum zip code range, then the corresponding parent location is assigned.
3. City and State: When city, state, and country values match, then the corresponding parent location is assigned.
4. State: When state and country values match, then the corresponding parent location is assigned.
{#determining-parent-location__ol_nt4_tq3_2qb}  
Note:  
The Country name is the default selection for all the criteria.

For more information, see [Create parent determination rules for
service locations](https://servicenow-prod.fluidtopics.net/4RAnKUJdNf6nEJWkYt7Dhg "Create parent determination rules that facilitate assignment of a parent to a service location.").
**Related concepts**   

* [Setting ad-hoc locations in work orders and work order tasks](https://servicenow-prod.fluidtopics.net/AwWO97ksV5~em5N__2xR4A "The Field Service with Service Locations feature adds options to provide an ad-hoc location when creating a work order or work order task on ServiceNow AI Platform, Agent Workspace, or Customer Service Portal.")