PHM, or Prognostics and Health Management, is a field of research that focuses on the development of technologies and methods for monitoring the health and performance of complex systems such as machinery, equipment, and infrastructure. The goal of PHM is to predict and prevent system failures before they occur, thereby reducing downtime, maintenance costs, and overall operating expenses. PHM involves the integration of sensing, data analysis, and modeling techniques to provide real-time information on the condition of a system and predict its future performance. This research area is particularly important in industries such as aerospace, defense, energy, and manufacturing, where the reliance on critical systems is high.