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方差分析因子水平可以改变在单独的测试结果之间的差异的波动引起的误差之间的差异所造成的测试结果，并可以提供一个可靠的估计的数目。正交试验使用SPSS软件进行方差分析，只需用鼠标在“菜单”，“盒子”，在操作中，该系统可以给统计分析的结果，分析结果准确可靠。

ANOVA factor level can change in test results caused by the difference between the error caused by fluctuations in the difference between the test results of separate , and can give a reliable estimate of the number .Orthogonal test using SPSS software for analysis of variance, simply use the mouse on the "Menu" , " box " in the operation , the system can give the results of statistical analysis , and the analysis results are accurate and reliable.

正交实验设计，也称为正交设计正交实验，被用来设计多因素试验的科学方法。其使用的一组归一化的正交（orthogonaltable）进行测试，那么测试结果得到的数理统计方法进行处理，所以得出科学的结论。正交设计，以均衡分散，整齐可比功能。其主要优点是，在许多实验条件下选择强大的少数民族代表试点方案，试点项目结果的分析，找到最佳的解决方案，或最好的生产工艺条件和测试结果通过一个小数目，可与自己相比，即使有关的因素的更多信息。

Orthogonal experimental design , also known as orthogonal design (orthogonaldesign), is used to design multi- factor test scientific method . Its use of a set of normalized orthogonal (orthogonaltable) to be tested , then the test results obtained mathematical statistical methods for processing, so draw scientific conclusions. Orthogonal design with balanced dispersion , neat comparable features. The main advantage is that in many experimental conditions selected strong minority representation pilot program , through which a small number of pilot programs analysis of the results , to find the optimal solution or the best production process conditions and test results can be compared to itself out even more information about the factors .

SPSS (Statistical Package for the Social Science) Social Sciences with a software package is the world famous statistical analysis software. It and the SAS (Statistical Analysis System, Statistical Analysis System ), BMDP (Biomedical Programs, biomedical program ) and known as the world's most influential of the three statistical software . SPSS statistical package called sociology , which is applied in order to emphasize their social science side ( because many phenomena of social science research are random , to use statistics and probability theory theorems for research ) , but in fact it is in the social sciences, natural sciences can play a huge role in various fields , and has been applied to economics, biology, education, psychology , medicine and sports , industry, agriculture , forestry , commercial and financial fields . SAS is the most powerful statistical software, improved data management and statistical analysis functions, is familiar with statistics and good programming choice for professionals . Compared with SAS , SPSS is a non- statistical professionals choice.

SPSS has with complete data entry, editing , statistical analysis , reports, graphics production and other functions. Comes with 11 types of 136 functions . SPSS provides a statistical description from simple to complex multivariate statistical analysis methods, such as exploratory data analysis, descriptive statistics , contingency table analysis , two-dimensional correlation , rank correlation , partial correlation , analysis of variance , non-parametric test , multivariate regression, survival analysis , covariance analysis, discriminant analysis, factor analysis, cluster analysis , nonlinear regression , Logistic regression and other functions.

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