4.4.4 Modular decomposition. To be completed if needed. 4.6 Function-oriented design. 4.7 User Interface Design. The G.U.I. should be designed regarding to the interface requirements specifications.
Reliability is the most important dynamic characteristic of almost all software systems.
Informaly reliability of a software is a measure of how well users think it provides the services that they require. More formally reliability is usually defined as the probability of failure- free operation for a specified time in a specified environment for a specified purpose. There are techniques to program for reliability. Verification and Validation. 6.1 the testing process.