EC-HSRA: Environment-Conditioned Hierarchical Shared-Resource Allocation for Multi-Task Regional Support

Regional support and emergency scheduling require repeated allocation of scarce defense, repair, mobility-assurance, and reconnaissance resources across responsibility regions under changing conditions. A shared-budget decision may prioritize a relevant task while failing to cover task-specific regions, or allocate resources to salient regions under an inappropriate task. Fixed sharing, pressure gating, and direct high-dimensional policies can ensure budget feasibility, yet they do not explicitly couple task allocation with task-conditioned regional decoding. This paper proposes Environment-Conditioned Hierarchical Shared-Resource Allocation (EC-HSRA). EC-HSRA abstracts the operating area as a regional graph and uses a constrained hierarchical action: the task layer learns state-conditioned task-budget allocation, and the regional layer generates task-specific threshold, focus, and coverage-mixing parameters. In the situation-cascade scenario, EC-HSRA reaches a mean shifted cumulative utility of 17.425, exceeding Pressure Gate at 10.972, Top-k Stitch at 14.522, and the explicit-prior variant at 16.524. Its normalized service-shortfall index is 0.941, lower than Pressure Gate at 1.047 and Unified Joint at 1.147. The results indicate that task-level allocation and task-specific regional decoding are complementary.