This Note describes ALA-X (Army Logistics Assessment--Extended), a project to develop a prototype methodology to build the logistics portion of the Army five-year program. In particular, it describes the central model, the logistics decision model (LDM), among the many small models that are used in the ALA-X methodology. LDM is a highly aggregate, two-sided, deterministic simulation of a theater campaign. Once LDM is calibrated, a user can vary stocks of resources and capacities, and observe their effects on combat performance measures. An additional set of models, the logistics functional models, makes it possible to bridge the gap between the physical resources of the Army program and the capacities measured by ALA-X.
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