Functional locations and the structure indicator

A functional location is a hierarchical, multi-level structure that represents a technical system, a building or part of one. SAP's learning material lists three ways to structure it: by space (building 1, building 2), by technical criteria (press, press frame, press hydraulics) or by function or process (polymerization, condensation). Most manufacturing plants mix the first two. Contoso's Detroit plant goes plant, area, line, station.

The structure indicator

Labels are not free text. They follow a structure indicator, which has two parts. The edit mask controls which characters are allowed in each position and how they are grouped and separated. SAP uses A for alphabetic, N for numeric, X for alphanumeric and S for special characters. The hierarchy levels define where each level ends in the label and how many levels the structure can have. A label can be up to 40 characters, the maximum length of the edit mask.

Because the levels are defined in the mask, SAP can work out the superior functional location from the label itself: when Rosa creates 1710-ASM-L1-W03, the system knows its parent is 1710-ASM-L1, as long as that parent exists. Plan the mask carefully. SAP's documentation is clear that once a functional location exists for a structure indicator, its edit mask can no longer be changed. A conversion keeps Contoso's ECC structure indicators exactly as they are, so the decision was made years ago; a new plant, such as Wave 2's Monterrey plant 1910, would be a chance to use the same indicator consistently.

Creating a functional location

1. Start IL01 (or create the location in the Manage Technical Objects app) and enter the structure indicator CMCFL.
2. Enter the label, for example 1710-ASM-L1-W04. The system checks it against the edit mask.
3. Fill in the General view: description, object type, class, manufacturer data where relevant.
4. Fill in the Location view: maintenance plant, location, plant section.
5. Fill in the Organization view: company code 1710, cost center, maintenance planning plant 1710, planner group, main work center.
6. In the Structure view, confirm the superior functional location and whether equipment installation is allowed.
7. Save, then check the hierarchy in the structural display IH01.

Inheriting data from the level above

Because the label tells SAP where a new location sits, the system can copy data from the superior location when you create locations top-down: maintenance plant, cost center, planning plant and similar fields. SAP's classic documentation notes that this only works when the hierarchy is built from the top level downwards. After creation, the hierarchy is held in the superior functional location field of each master record, not re-read from the label. For testers, that means two checks: new locations should pick up the right defaults from their parent, and a location moved under a different parent must show the new parent in the structural display.

Name design is a business decision, not a Basis one. Before Monterrey's locations are built in Wave 2, Rosa wants the Mexican maintenance team to agree the area codes (ASM, UTL, and so on) with Detroit, so that one report can compare compressed air breakdowns across 1710, 1720 and 1910 by reading the same level of the label.

Fiori, GUI and the Public Edition

In SAP S/4HANA 2025, planners can work with technical objects in Fiori (Manage Technical Objects to create and change functional locations and equipment, Find Technical Object to search and navigate the structure) or in SAP GUI with the IL and IE transactions. The objects and tables are the same: functional locations in IFLOT (with texts and location data in related tables), equipment in EQUI, and time-dependent equipment data in EQUZ, which is where each usage period lives. In SAP S/4HANA Cloud Public Edition, the Fiori apps are the only way in, and structure indicators are set up through the configuration steps offered there rather than in the IMG.