An output indicator answers a delivery question. How many people did we reach. How many sessions did we run. How many grants did we award. The indicator is correct when the count matches the records: attendance sheets, disbursement logs, session calendars. Output indicators can be reported from operational systems the program already runs.
An outcome indicator answers a change question. How many participants are employed at 90 days. By how much did average confidence shift from intake to exit. What percent of grantees met their year-2 commitments. The indicator requires a baseline reading and a later reading on the same person, household, or grantee record. Without the linked observations, an outcome indicator cannot be reported credibly. It can only be estimated, and estimates without baselines tend to overstate change.
Logic models and results frameworks place output indicators at the activity-to-output transition and outcome indicators at the output-to-outcome transition. IRIS+ uses a similar layered taxonomy. The label difference is not cosmetic. It defines what data you need to capture and from whom.
The most common mistake is reporting an output indicator (workshops delivered, certificates issued) and naming it an outcome. The label change does not generate change evidence. The opposite mistake also occurs: writing strong outcome indicators into a logic model and then never building the follow-up cadence to measure them. The indicator is good. The infrastructure to populate it is missing.