​@shannon.mejia are these custom fields in the Assets module? You might need to create a custom metric for your use case. But currently, you can’t use custom fields to create/define a custom metric or custom attribute.

​@Amrit Mishra these are not custom fields.  The operating system is a standard field for laptop and desktop.  

​@shannon.mejia Thanks for clarifying. Could you please see if you can create a custom metric that can give you the required percentage calculation?

​@Amrit Mishra because OS is an attribute only available for specific CI Types, it is not showing in the “column” list for the custom metric.  How do I get it to show all options?

​@shannon.mejia Thanks for sharing the use case. Unfortunately, this is not currently supported. Please feel free to log an idea for this ask so that it gets the necessary visibility and traction. 

To log an idea, please click on this link: https://community.freshworks.com/ideas and click on the ‘Create a topic’ button. On the next page, please select Idea for ‘What kind of topic are you creating?’. In the ‘sub forum’ field, please select Analytics under Freshservice.