Business logic

It is contrasted with the remainder of the software that might be concerned with lower-level details of managing a database or displaying the user interface, system infrastructure, or generally connecting various parts of the program.

[2] Business logic is the portion of an enterprise system which determines how data is transformed or calculated, and how it is routed to people or software (workflow).

[3] For example, an e-commerce website might allow visitors to add items to a shopping cart, specify a shipping address, and supply payment information.

Distant but strongly coupled code also creates more of a risk that the programmer will only make some of the necessary changes and miss part of the system, leading to incorrect operation.

The magic pushbutton is considered an "anti-pattern": a technique that in this case creates undesirable constraints which make it difficult to code business logic in an easy-to-maintain way.