引用文献《单基准给定方向轴线对平面倾斜度误差的评定》(蔡改贫，朱同发《南方冶金学院学报》1998年第6期）给出的基准平面算例，该例有100个样本点。其计算出的平面度误差为7.896321um；用本算法进行计算，得出的平面度误差为为5.5131578um（a=0.000014,b=0.000010,c=1.000000）。测量数据：
y=@10000.0um;x=@10000.0um;
z=1.2;
z=1.5;
z=0.6;
z=-1.12;
z=-0.8;
z=2.6;
z=3.5;
z=2.5;
z=1.0;
z=0.2;
z=0.6;
z=2.1;
z=3.6;
z=-0.3;
z=1.4;
z=1.0;
z=2.2;
z=2.1;
z=3.0;
z=-1.5;
z=1.0;
z=0.6;
z=-1.6;
z=2.2;
z=2.4;
z=3.0;
z=1.4;
z=0.0;
z=-2.5;
z=1.5;
z=2.4;
z=1.0;
z=-0.6;
z=1.0;
z=2.0;
z=2.8;
z=1.0;
z=-1.8;
z=2.0;
z=2.0;
z=-2.0;
z=-1.0;
z=2.1;
z=1.1;
z=1.4;
z=-1.6;
z=-1.4;
z=0.0;
z=1.5;
z=2.6;
z=1.1;
z=1.2;
z=1.5;
z=-0.2;
z=0.6;
z=-0.8;
z=-1.0;
z=1.2;
z=1.8;
z=-1.2;
z=1.0;
z=1.2;
z=1.6;
z=2.2;
z=2.4;
z=2.0;
z=1.6;
z=1.8;
z=1.2;
z=-1.2;
z=-1.5;
z=-2.4;
z=2.0;
z=2.6;
z=-0.4;
z=0.5;
z=0.6;
z=0.4;
z=1.0;
z=-1.0;
z=-2.0;
z=-2.0;
z=1.4;
z=2.0;
z=-0.2;
z=0.5;
z=0.6;
z=-1.4;
z=1.5;
z=-0.5;
z=1.0;
z=1.2;
z=1.2;
z=1.6;
z=0.6;
z=-1.2;
z=-2.0;
z=-1.4;
z=2.0;
z=1.5;