The term 'KIND OF PILOT OR CASE' can be solved by the four letter word 'TEST'. A TEST pilot is a person who flies new and modified aircraft in specific maneuvers to evaluate their performance, handling, and other characteristics. TEST pilots may work for military organizations or private companies. A TEST case is a set of conditions or variables under which a tester will determine whether a system under TEST satisfies requirements or works correctly. TEST cases are often used in software engineering to validate that the program meets its requirements and produces the expected results.