An ecological model that predicts resource‑selection and subsistence decisions by organisms (including humans) as strategies that maximize net returns (commonly energetic gains) relative to costs such as search time and handling time, subject to constraints and trade‑offs; in archaeology OFT is used as a testable framework for interpreting diet composition, tool choice, and mobility.

Principle

Foragers preferentially include resources with higher marginal return rates until inclusion lowers overall gains; patch‑use, prey‑choice and diet breadth follow from optimizing net benefit given constraints (search time, handling time, diminishing returns, and risk).

Demonstration

Illustrative scenario: A community exploits large ungulates while abundant (situation); when large prey become scarce or risky, small‑game and plant resources are added to the diet (recognition and action), producing an increase in small‑faunal remains and diversified plant processing debris in later strata (consequence consistent with OFT predictions).

Misapplication

Assuming OFT implies conscious calorie‑counting, or treating its energetic optimization predictions as exhaustive explanations without accounting for cultural preferences, nutritional balance, food taboos, sharing norms, or risk‑aversion; such readings conflate modelling assumptions with full behavioural determinants.

Consequence

Offers falsifiable hypotheses about resource choice, assemblage composition, and mobility that can be compared with zooarchaeological and botanical proxies; however, archaeological support typically requires multi‑proxy evidence and careful attention to non‑energetic constraints.

Reversal

When social norms, ritual significance, micronutrient requirements, or risk‑management strategies dominate decision criteria, energetic maximization is a poor predictor and OFT must be supplemented or revised.

Boundary

Clearly within: subsistence situations where energy/time trade‑offs are primary decision drivers. Boundary case: mixed economies where production has both subsistence and social aims. Clearly outside: contexts where symbolic, political or ritual motives determine resource use irrespective of energetic returns.

Semantic Tension

Energetic optimization ↔ Cultural, nutritional and social motives — tension between mechanistic optimisation models and multi‑dimensional human decision criteria.

Synthesis

OFT supplies a compact, testable null model for subsistence behaviour; its proper use treats energetic optimization as one of multiple constraints to be measured and integrated, not as a universal behavioural law.