This book describes specific concepts for examining software verification processes, from an analysis perspective to various proposals that apply the Test Cases technique from use cases, and illustrates the structure of an important concept in software testing. - The testing effort must be linearly integrated into the product development process, from the initial phases of the life cycle, to achieve efficient and effective achievements. Isolating the testing effort in a black box for the end of that cycle is a common mistake and should be avoided, because it may incur an increase in lead time and final costs. The book is the result of a research process in which recent proposals to design test cases for functional software testing were evaluated. From the initial sample, nine were selected, which were subsequently applied in an experimental process to validate, verify and compare the efficiency and effectiveness of the test cases that they structure and generate. Then, the results were taken to design a new methodological proposal taking advantage of the best practices of each one. The new proposal is described and applied to a case study, through which the functional testing of the software is carried out through a verification process parallel to the Requirements Engineering. We extend our gratitude in this process.