Function points (FPs) are proven to be effective and efficient units of measure for both agile/iterative and waterfall software deliveries. However, inconsistencies come to light when comparing FPs counted in agile/iterative development with those counted in waterfall or combination development – and those inconsistencies can create confusion for cost, productivity, and schedule evaluations that span multiple software delivery methods. This paper by QSM Consultant Carol Dekkers seeks to marry International Function Point Users Group (IFPUG) definitions with equivalent concepts in agile/iterative processes so as to create a basis for consistent comparison. This paper was originally published on IFPUG's Beyond MetricViews.