Distinguish between system analysis and system design. System design means to make any module or a part of the structure from scratch and build it completely without estimation. Systems design is actually the third step of the sdlc its where the analysis designs how the system will operate. Analysis easier for very weak or very strong systems. Double function of such invention.
Systems design it is a process of planning a new business system or replacing an existing system by defining its components or modules to satisfy the specific requirements. Performed by a systems analyst. System design is carried out by a programmer who decides how the system must be implemented. Performed by chief programmer or software architect or lead developer system specification.
System design is the phase that bridges the gap between problem domain and the existing system in a manageable way. Everything about what the proposed system will do nothing about how it is to be be built. Structured systems analysis and design methodology ssadm is a set of standards for systems analysis and application design. It also deals with the feasibility of implementing the system as well understanding what kind of data will be collected and stored.
Sa best conceived as constructive not judicial. This phase focuses on the solution domain ie. It uses a formal methodical approach to the analysis and design of information systems. Example of runwaytaxi way system.
Multiple uncertainties require invention of strong flexible systems. How to implement it is the phase where the srs document is converted into a format that can be implemented and decides how the system will operate. Definition what does structured systems analysis and design method ssadm mean. This includes choice of platform as well as the design of database program and user interface.
In essence systems analysis is concerned with problem solving creating a system that will solve an organisational problem. Analysis specifies what the system should do. System analysis can be defined as a deep analysis of a part of a structure of a module which is been designed before.