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When we design a software then it passes through several phases such as analysis, design and development, testing etc. The phase of analysis focuses on finding out “ what “ the new software is doing. And the designing phase is the “how to” of the system. Analyst gathers all requirement and makes a document. Hence it is translated to a design specification. User oriented documents or analysis report make a starting point and system professional such as programmer can develop the system. The design phase begins when an analysis phase is completed. Hence this requires experience and creative project team. And even the team will expand in future when actual development phase will start. Design can be defined as: “ Design is a process to translate the logical model of system in the physical software system that meet their requirements” Designing Aspect When a designer is going to start designing then it is most important to consider several factors that helps to meet the objectives. 1. Performance : it is most important to consider how fast the software system performs their work. It has great responsive time and run time to create work which is accurate and faster. 2. Secure : Another most important factor which designer must keep in mind is that system must be secure and error free. There should be no any hardware or software related issue. 3. Changeability : System should be designed in such a way that if any kind of updates are required in future then it can be easily implemented without changing their hardware or software configuration. Logical and Physical Design : The procedure of software solution starts with the logical design. An analyst communicates with a client and gets all the requirement for software solution. The logical design is the most important stage in the software development life cycle. Logical design includes several things such as how a company works, what are the modules or section in the company. What are the reports that is required to generate for client and user etc. When all the analysis is completed then it is converted into a physical design. The several geeky programmers work on physical designs to make a software solution according to the analysis reports. Here I have given several things which are included in this phase: 1. Input , output and interface 2. Files and database 3. Methods and procedure 4. Data flow in the physical system 5. Complete programming or coding information for programmers 6. Coding testing 7. System implementation plan Data Modeling and Design : When you are going to create a data model or data design then it requires deep analysis about the organization. When you want to make a data model, then first you will need to create a Data flow diagram and entity relation diagram that describes all the details such as how data flows in the organization and what are the entities required in the software system. And accordingly, the analyst, software analyst and programmer team will design a database. Hence data modeling is very important phase in the software development process. Here , we have seen the phases of software design and modeling. As per my view, software modeling is not an easy task, it requires lots of effort and deep knowledge about businesses and its functions. Thanks
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