The least invasive method of fine-tuning your E-Business Suite environment to your users’ needs is via personalizations.  If that approach is insufficient, you can create custom applications via Forms, Reports, and other technologies that segregate your customizations from the standard functionality provided with Oracle E-Business Suite.

If you’re considering that approach for customizing EBS 12.2, see:

• Creating a Custom Application in Oracle E-Business Suite Release 12.2 (Note 1577707.1)

This Note covers:

• Using adsplice to create a custom application
• Verifying the creation of custom products in the database 
• Running AutoConfig to set-up application servers
• Creating custom objects, including tables, indexes, and sequences
• Propagating changes to your file systems

Related Articles

• Webcast: “Migrating and Managing Customizations for Oracle E-Business Suite 12.2”
• New Whitepaper: Upgrading your Customizations to Oracle E-Business Suite Release 12
• To Customize or Not to Customize?
• Support Implications for Your EBS Customizations

Source: https://blogs.oracle.com/stevenchan/creating-custom-applications-in-ebs-122