TRIZ, or "theory of inventive problem solving," is a systematic approach to problem-solving that seeks to find the best way to solve a problem by looking at past solutions to similar problems. One of the key concepts in TRIZ is the idea of self-service, or intermediary actions that a device can take to reduce the need for human involvement. For example, instead of having a human operator drill a hole for a tube, TRIZ would suggest that the tube itself could be heated or sharpened so that it can drill the hole itself. This concept of self-service can be applied to many different areas, from maintenance to testing, and can help to improve efficiency and reduce costs. In today's world, where time is often at a premium, TRIZ offers a valuable tool for those who are looking to streamline their operations.