通过实例说明，该算法能得到不完备决策表的最小相对约简。
An example shows this algorithm can achieve the minimal relative reduction of incomplete decision table.
为了能够从不完备决策表（IDT）中进行知识发现和数据挖掘，提出一种新的具有对称性的双重可变精度限制容差关系粗集模型（VPLTRST）。
To obtain knowledge and data from incomplete decision table(IDT), the paper presents a new doubly variable precision limited tolerance rough set theory model(VPLTRST).
该方法不需要改变原始不完备故障诊断决策表的规模，且具有更高的约简计算效率。
The method proposed does not require a change in the size of the original incomplete data set, and has higher efficiency of computing reduction.
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