When can a form modification be regarded as simple in a standard SAP S/4HANA system?

A form modification can be regarded as simple in a standard SAP S/4HANA system when the field exists in the communication structure. This means that the field is part of the existing infrastructure and does not require extensive changes or complex logic to accommodate it. Since it is already defined within the communication structure, incorporating it into a form would typically involve straightforward adjustments, making the modification process efficient and less prone to issues.

In contrast, situations where a field is part of a new communication structure, requires an external program, or is complex and necessitates additional coding would complicate the modification process. Each of these scenarios implies a level of complexity or external dependency that would make the modification more involved, thus not qualifying it as a simple modification.