39 U.S.C. § 2801

1. (1)“outcome measure” refers to an assessment of the results of a program activity compared to its intended purpose;
2. (2)“output measure” refers to the tabulation, calculation, or recording of activity or effort and can be expressed in a quantitative or qualitative manner;
3. (3)“performance goal” means a target level of performance expressed as a tangible, measurable objective, against which actual achievement shall be compared, including a goal expressed as a quantitative standard, value, or rate;
4. (4)“performance indicator” refers to a particular value or characteristic used to measure output or outcome;
5. (5)“program activity” means a specific activity related to the mission of the Postal Service; and
6. (6)“program evaluation” means an assessment, through objective measurement and systematic analysis, of the manner and extent to which Postal Service programs achieve intended objectives.