Traditional Culture Encyclopedia - Photography major - What are the common methods and applicable conditions for setting the horizontal interval of test factors?

What are the common methods and applicable conditions for setting the horizontal interval of test factors?

Suitable for equal interval method and binary method.

1, equal interval method: the levels of test factors are set at equal intervals, which is suitable for the case that the number of test factors is relatively small and there is no special relationship and constraint between levels.

2. Binary method: setting the levels of test factors in a binary way, which is suitable for situations where there are many levels of test factors and there are special relationships and constraints between them.