This is a users guide that explains why probability reliability analysis should no longer be used to quantify spacecraft equipment and space vehicle reliability in probabilistic values, which is wrong, since equipment failures are not random, instantaneous nor memory-less as is required to use probability reliability analysis. The author includes an explanation of prognostics and health management program and some of the complex tools and concepts to develop a successful prognostics and health management (PHM) technology used by the author to predict equipment and/or products failures with 100% certainty on many spacecraft including the Air Force's GPS satellites, The author includes many examples of the author's results on spacecraft such as GPS satellites, NASA weather and space science satellites and commercial, geostationary satellites and on the Titan, Atlas F and Ariane launch vehicles. The algorithms discussed are proprietary and not included but their use and and functionality is well described. The material requires a significant backgrounds in the following areas to understand the concepts of PHM including mathematical analysis, electrical circuit design, mechanical assembly design, orbital mechanics, probability reliability analysis, space systems design, aerospace engineering, predictive science, RF and digital communications science and signal processing. This book can also be used in conjunction with the author's other books on PHM technology and how to apply PHM technology to other industries to stop the premature failures of equipment and products, reducing or eliminating product returns, lowering production costs while increasing profit margins