The model created a series of subsystems from the known decision system at different reduced levels to form a reduced lattice, and then reasoned its own rule set at each node.

• 该模型从已知决策系统出发，建立了处于不同简化层次上的一系列子系统，并将其作为简约格中的节点，然后推导出每个节点的规则集。