Nonsystematic

Nonsystematic refers to actions taken that are not being done with a fixed plan or system or that are being done in an unmethodical manner. A simple example would be going on a vacation with no definite plan or destination - just flipping a coin for a direction to travel and heading out. In science, a nonsystematic study might be the observation of children (or animals) in a natural environment to simply see how they live, eat, play, socialize, etc.