Hi @Ganji-shri 

You can search for inventory management for FSM to know about how to configure stockrooms, and other assets used in field service operations

Here are documentation link which might be help:

https://www.servicenow.com/docs/bundle/zurich-field-service-management/page/product/field-service-ma...

https://www.servicenow.com/docs/bundle/zurich-field-service-management/page/product/field-service-ma...

https://www.servicenow.com/docs/bundle/zurich-it-asset-management/page/product/asset-management/conc... 

ServiceNow learning path module:4 is all about inventory management

https://learning.servicenow.com/lxp/en/field-service-management/field-service-management-fsm-impleme...

Thanks and Regards,

Mohammed Zakir