Stochastic processes sometimes lead to statements that contradict intuition. In such cases, two mathematical models may seem equally plausible in a given application situation but yield entirely different results. What to do now? This book provides you with an introduction to typical stochastic questions. The sections "What's Behind It" and "What Matters" in each chapter highlight the essence of the topic. Calculation methods are presented in a way that allows you to apply them immediately. Numerous examples from various application areas illustrate the practical uses of stochastic processes.