Comprehensive and Detailed Step-by-Step Explanation:Inherited fields in ServiceNow are fields that are part of a parent table and automatically become part of child tables through inheritance. This structure is foundational in the ServiceNow data model, ensuring that child tables maintain a consistent relationship with their parent tables.
Here's why inherited fields cannot be deleted from a child table:
* System Design:ServiceNow employs a table inheritance model where child tables derive fields and properties from parent tables. Deleting inherited fields from a child table would break the integrity of the data model, as those fields are shared across multiple tables.
* Impact on Functionality:Many inherited fields, such as sys_created_on or sys_updated_by, are integral to the functionality of the platform. Removing them could disrupt workflows, reporting, and auditing capabilities.
* Alternative Approach:If you want to hide or restrict access to inherited fields in a child table, you can use ACLs (Access Control Lists) to prevent users from viewing or modifying these fields. Another option is to use UI Policies or Client Scripts to control their visibility on forms.
* Developer Note:Attempting to delete inherited fields violates ServiceNow's core principles of maintaining a robust and unified data structure. The platform enforces these rules to ensure consistent behavior across all tables in the hierarchy.
References:
* ServiceNow Developer Documentation on Table Inheritance.
* Best practices outlined on SN Pro Tips regarding scoped application development and table structures.

The Allow configuration Application Access option determines whether users can configure the application tables, such as adding or modifying fields, views, or indexes. The following is true for a table with the Allow configuration option selected:
Out of scope applications can create Business Rules for the table. This is true because the Allow configuration option grants access to the table configuration to any user who has the admin or personalize_dictionary role, regardless of the application scope. This means that users can create Business Rules, which are server-side scripts that run when a record is displayed, inserted, updated, or deleted, for the table from any application.
The following are not true for a table with the Allow configuration option selected:
Only the in scope application's scripts can create Business Rules for the table. This is false because the Allow configuration option does not restrict the creation of Business Rules to the in scope application, as explained above.
Any user with the application's user role can modify the application's scripts. This is false because the Allow configuration option does not grant access to the application scripts, such as client scripts or script includes, to any user who has the application's user role. To modify the application scripts, users need to have the admin role or the application's admin role.
Out of scope applications can add new tables to the scoped application. This is false because the Allow configuration option does not allow out of scope applications to add new tables to the scoped application. To add new tables to a scoped application, users need to have the admin role or the application's admin role and be in the application scope. References: Application Access, Business Rules

ServiceNow supports publishing an application to an application repository, an Update Set, or the ServiceNow Store. These methods allow the application to be installed on other instances or shared with other users.
Publish an application to the application repository
4 Ways to Publish a ServiceNow Application
Publish applications to the ServiceNow Store