Hi Krishna,
For inspection type 03 'Task list usage' is 1(Production) by default. You can not see the usage in customizing for inspection type 03. If you need to maintain different inspection plan, then copy Inspection type 03 and create new Z inspection type. In this Z inspection type maintain your usage and create new inspection plan and maintain material master accordingly and try.
Hope this helps you.
Best regards,
Gururaj Kulkarni