Of course, since software errors are inevitable there is no other way than to test extensive and systematically. In Europe adaptions of the V-Model [1] are in w

Of course, since software errors are inevitable there is no other way than to test extensive and systematically. In Europe adaptions of the V-Model [1] are in wide spread use. Even for smallish projects, expensive simulation of substantial cost is completely normal [2]. Hence there should have been a test software component, that can simulate realistic landing data. This component failed to identify the error, which is nothing more than a big blunder of the testing team. [1] https://en.wikipedia.org/wiki/V-model https://en.wikipedia.org/wiki/V-model [2] https://en.wikipedia.org/wiki/Hardware-in-the-loop_simulation https://en.wikipedia.org/wiki/Hardware-in-the-loop_simulatio...