TRIZ, or "theory of inventive problem solving," is a systematic approach to problem-solving that aims to help people find creative solutions. One of the key concepts in TRIZ is the idea of phase transition, or the transition between different states of matter. For example, water can transition from a solid to a liquid to a gas, and these transitions can be controlled by factors like temperature and pressure. By understanding how phase transition works, we can better control it and use it to solve problems. For instance, if we want to stop water from evaporating, we can lower the temperature or increase the pressure. Similarly, if we want to speed up the process of cooling down a hot object, we can apply a catalyst (such as ice) or transition the object to a different state (such as a liquid). By understanding phase transition, we can better control our environment and find new ways to solve problems.