Third black box testing technique is decision table testing.

It is used when we have lots of testing data then we represent all the data in a decision table.

Here we can put test conditions and actions in rows and results in columns.

For example lets day for a life insurance company

For Male age 18 to 64 premium is $1000 For anyone Age>64 premium is $1500 For anyone age<18 no premium

So we can put all the data in a table where age groups are put in rows and eligibilities is put in columns. We determine the number of tests based on the data in the table and run the test accordingly.