how to start ServiceNow to BigFix Integration & best way to integrate ?

Champion has developed a certified app in the ServiceNow store to integrate BigFix with ServiceNow. You can download a trial at https://store.servicenow.com/sn_appstore_store.do#!/store/search?q=ebridge%20bigfix

Key Features

Champion Solutions Group provides a dynamic, real-time interface connecting the BigFix enterprise solution with ServiceNow.

CMDB Discovery of assets
CMDB Relationship mapping of Bigfix related lists
Full application orchestration of baselines, tasks, fixlets, computer settings
Full managed properties extract
Sites list to provide for fixlet and baseline requests
Baselines are mined and are put into a relationship based on Bigfix Site. All components are pulled into a relationship tree under the Baseline object within the CMDB.
Dynamically add Baseline Path and Baseline ID to Core properties gather
Dynamically pull Action data and create incident based on failures
Create relationships of computers and the action status
Perform Bigfix provider XML translation for ServiceNow consumer that is JSON
Full auditing within end state product (ServiceNow) down to the method call level
Security abstraction and configuration layer that provides integration through basic setup
Dynamic loading of groups, fixlets, actions and baselines based on recursive reading of Sites
Create automatic workflows to support patching process
Custom configuration and setup