and Design Method (SSADM), selecting the Data Flow Diagram (DFD) for behavior description and the Structure Chart (SC) for structure description, is classed as a non-architectural approach. On the other hand, the architectural approach, rather than selecting numerous heterogeneous and unrelated models, will employ just one single coalescence model. For instance, system architecture, employing the Architecture description Language (ADL) for both behavior and structure descriptions, is classed as an architectural approach.
The state of a system, often determined by which programs are running and basic hardware and software features. For instance, when a program is said to be running in a UNIX environment, it means the program is running on a system with UNIX. As a result, one key element of an environment is the operating system. However, operating systems constitute a number of unique parameters. For instance, many operating systems enable users to select their command prompt or a default command path. When grouped together, all these parameters form the environment. In this sense, another term for environment is platform. In DOS systems, environment is a section in memory that the operating system and other applications use to store different types of miscellaneous data. For instance, word processor can use the environment section to store the location of backup information. The environment can be viewed or modified using the SET command.
This is a graphic model of a project’s schedule, depicting the sequence of tasks, the critical path of tasks that must be finished on time for the project to meet its completion date, and which ones can be performed simultaneously. PERT charts can be designed with different features, such as earliest and latest commencement dates for each task, earliest and latest finish dates for each task, and time wasted between tasks. PERT charts can document whole projects or an important stage of a project. They allow project teams to