Article
Fit-for-Purpose Fidelity in Defense Simulation
Defense simulation fidelity should be selected by decision purpose, analytical risk, and validation requirements, not visual complexity.
Fidelity Is a Decision Variable
In defense simulation, higher fidelity is often treated as always better. In practice, fidelity should be chosen based on decision purpose. A model can be highly detailed yet analytically unhelpful if that detail does not affect the decision question.
Fit-for-purpose fidelity aligns model complexity with the risk profile of the decision being supported.
Cost of Excess and Insufficient Fidelity
Excess fidelity increases data burden, validation effort, and runtime costs. It can slow iteration and make sensitivity analysis less practical.
Insufficient fidelity introduces structural blind spots. Important interactions may be omitted, making outputs falsely stable or overly optimistic. The right level is neither maximal nor minimal; it is purpose-matched.
Choosing Fidelity with Explicit Criteria
A practical approach is to map fidelity choices to decision categories: exploration, comparison, procurement support, operational rehearsal, or doctrine testing. Each category has different traceability and validation requirements.
Defining these criteria early prevents model scope creep and keeps stakeholders aligned on what the simulation is designed to answer.
Fidelity Requires Deterministic Foundations
Fidelity decisions only matter when execution is deterministic and scenario design is controlled. Otherwise, observed differences may come from platform variability rather than model abstraction choices.
Fit-for-purpose fidelity is therefore a system-level policy tied to architecture, scenario governance, and output traceability.