The Min/Max Range custom field allows you to define the value range for the number custom field type.
To create and configure the Min/Max Range custom field, you must be logged in as a user with Jira Administrator permissions.
Go to Apps → Manage your apps → Custom Field Suite
Click on Create custom field button on the right side of the screen.
Select Min/Max Range and click Next.
Name and add a description to your field then click Next.
Enter Min and Max value (1 and 100 by default) and click Next.
Associate the field to the appropriate screens and click Create. You must associate a field to a screen before it will be displayed.
That’s it! You can now navigate to your issue and enhance it with Min/Max Range.