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A Software Application design and development process (also known as a Software Application design and development methodology, model, or life cycle) is a framework that is used to structure, plan, and control the process of developing information systems. A wide variety of such frameworks has evolved over the years, each with its own recognized strengths and weaknesses. There are several different approaches to Software Application design and development: some take a more structured, engineering-based approach to develop business solutions, whereas others may take a more incremental approach, where software evolves as it is developed piece-by-piece. One system development methodology is not necessarily suitable for use by all projects. Each of the available methodologies is best suited to specific kinds of projects, based on various technical, organizational, project and team considerations.
- Analyzing the problem
- Market research
- Gathering requirements for the proposed business solution
- Devising a plan or design for the software-based solution
- Implementation (coding) of the software
- Testing the software
- Maintenance and bug fixing
These stages are often referred to collectively as the Software Application design and development life-cycle, or SADDLC. Different approaches to Software Application design and development may carry out these stages in different orders or devote time to different stages. The level of detail of the documentation produced at each stage of Software Application design and development may also vary. These stages may also be carried out in turn (a “waterfall” based approach), or they may be repeated over various cycles or iterations (a more "extreme" approach). The more extreme approach usually involves less time spent on planning and documentation, and more time spent on coding and development of automated tests. More “extreme” approaches also promote continuous testing throughout the development life-cycle, as well as having a working (or bug-free) product always. More structured or “waterfall” based approaches attempt to assess most risks and develop a detailed plan for the Software Application before implementation (coding) begins and avoid significant design changes and re-coding in later stages of the Software Application design and development life-cycle planning.
There are significant advantages and disadvantages to the various methodologies, and the best approach to solving a problem using software will often depend on the type of problem. If the problem is well understood and a solution can be effectively planned out ahead of time, the more "waterfall" based approach may work the best. If, on the other hand, the problem is unique and the structure of the Software Application solution cannot be easily envisioned, then a more "extreme" incremental approach may work best.
Identification of Need
The sources of ideas for Software Application products are plentiful. These ideas can come from market research including the demographics of potential new customers, existing customers, sales prospects who rejected the product, other internal Software Application design and development staff, or a creative third party. Ideas for Software Application products are usually first evaluated by marketing personnel for economic feasibility, for fit with existing channels distribution, for possible effects on existing product lines, required features, and for fit with the company's marketing objectives. In a marketing evaluation phase, the cost and time assumptions become evaluated. A decision is reached early in the first phase as to whether, based on the more detailed information generated by the marketing and development staff, the project should be pursued further.
Software Application design and development may involve compromising or going beyond what is required by the client, a Software Application design and development project may stray into less technical concerns such as human resources, risk management, intellectual property, budgeting, crisis management, etc. These processes may also cause the role of business development to overlap with Software Application design and development.
Planning is an objective of each activity, where we want to discover things that belong to the project. An important task in creating a Software Application program is extracting the requirements or requirements analysis. Clients typically have an abstract idea of what they want as a result, but do not know what Software Applications should do. MasteringROI.com software engineers recognize incomplete, ambiguous, or even contradictory requirements at this point. Frequently demonstrating live code may help reduce the risk that the requirements are incorrect
Once the general requirements are gathered from the client, an analysis of the scope of the development should be determined and clearly stated. This is often called a scope document.
Once the requirements are established, the design of the Software Application can be established in a software design document. This involves a preliminary or high-level design of the main modules with an overall picture (such as a block diagram) of how the parts fit together. The language, operating system, and hardware components should all be known at this time. Then a detailed or low-level design is created, perhaps with prototyping as proof-of-concept or to firm up requirements.
Implementation, Testing & Documenting
Implementation is the part of the process where MasteringROI.com program the code for the project
Software testing is an integral and important phase of the Software Application design and development process. This part of the process ensures that defects are recognized as soon as possible. In some processes, generally known as test-driven development, tests may be developed just before implementation and serve as a guide for the implementation's correctness.
Documenting the internal design of the Software Application for the purpose of future maintenance and enhancement is done throughout development. This may also include the writing of an API, be it external or internal. The MasteringROI.com process will determine how much internal documentation (if any) is necessary. Plan-driven models (e.g., Waterfall) generally produce more documentation than Agile models.
Deployment starts directly after the code is appropriately tested, approved for release, and sold or otherwise distributed into a production environment. This may involve installation, customization (such as by setting parameters to the Client's values), testing, and possibly an extended period of evaluation.
Software training and support is important, as the software is only effective if it is used correctly Maintaining and enhancing Software Applications to cope with newly discovered faults or requirements can take substantial time and effort, as missed requirements may force a redesign of the software. In most cases maintenance is required on regular basis to fix reported issues and keep the Software Application running.