What is a Decision Table
It is a table which shows different combination inputs with their associated outputs, this is also known as cause effect table.
In EP and BVA we have seen that these techniques can be applied to only specific conditions or inputs however if we have different inputs which result in different actions being taken or in other words we have a business rule to test where there are different combination of inputs which result in different actions.
For testing such rules or logic decision table testing is used.
It is a black box test design technique.