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From Wikipedia, the free encyclopedia
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Software development process
Coding Shots Annual Plan high res-5.jpg
Core activities
Methodologies
Supporting disciplines
Tools

Software development is the computer programming, documenting, testing, and bug fixing involved in creating and maintaining applications and frameworks involved in a software release life cycle and resulting in a software product. The term refers to a process of writing and maintaining the source code, but in a broader sense of the term it includes all that is involved between the conception of the desired software through to the final manifestation of the software, ideally in a planned and structured process.[1] Therefore, software development may include research, new development, prototyping, modification, reuse, re-engineering, maintenance, or any other activities that result in software products.[2]

Software can be developed for a variety of purposes, the three most common being to meet specific needs of a specific client/business (the case with custom software), to meet a perceived need of some set of potential users (the case with commercial and open source software), or for personal use (e.g. a scientist may write software to automate a mundane task). Embedded software development, that is, the development of embedded software such as used for controlling consumer products, requires the development process to be integrated with the development of the controlled physical product.

The need for better quality control of the software development process has given rise to the discipline of software engineering, which aims to apply the systematic approach exemplified in the engineering paradigm to the process of software development.

Overview[edit]

There are several different approaches to software development: some take a more structured, engineering-based approach to developing business solutions, whereas others may take a more incremental approach, where software evolves as it is developed piece-by-piece. Most methodologies share some combination of the following stages of software development:

  • 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
  • Deployment
  • Maintenance and bug fixing

These stages are often referred to collectively as the software development lifecycle, or SDLC. Different approaches to software development may carry out these stages in different orders, or devote more or less time to different stages. The level of detail of the documentation produced at each stage of software 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 lifecycle, as well as having a working (or bug-free) product at all times. More structured or “waterfall” based approaches attempt to assess the majority of risks and develop a detailed plan for the software before implementation(coding) begins, and avoid significant design changes and re-coding in later stages of the software 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 (at least to the development team) and the structure of the software solution cannot be easily envisioned, then a more "extreme" incremental approach may work best. A software development process is a structure imposed on the development of a software product. Synonyms include software life cycle and software process. There are several models for such processes, each describing approaches to a variety of tasks or activities that take place during the process.

Consistency in software[edit]

In order to ensure that software can evolve in a way that maintains its inherent multi-dimensionality, one must ensure that the different dimensions evolve together in a consistent manner. Software has too many dimensions to combine within a single framework. A good mechanism should not be geared to a specific problem such as ensuring the consistency of a Unified Modeling Language (UML) class diagram with the source code. Instead it should be flexible enough to handle the broad range of dimensions that are actually involved in software development.[3]

Software development topic[edit]

Marketing[edit]

The sources of ideas for software products are legion.[4] 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 development staff, or a creative third party. Ideas for software 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.[4]

In the book "Great Software Debates", Alan M. Davis states in the chapter "Requirements", subchapter "The Missing Piece of Software Development"

Students of engineering learn engineering and are rarely exposed to finance or marketing. Students of marketing learn marketing and are rarely exposed to finance or engineering. Most of us become specialists in just one area. To complicate matters, few of us meet interdisciplinary people in the workforce, so there are few roles to mimic. Yet, software product planning is critical to the development success and absolutely requires knowledge of multiple disciplines.[5]

Because software development may involve compromising or going beyond what is required by the client, a software 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 development.

Software development methodology[edit]

A software development methodology is a framework that is used to structure, plan, and control the process of developing information systems. A wide variety of such frameworks have evolved over the years, each with its own recognized strengths and weaknesses. 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.


How to develop software[edit]

Software development can be divided into two camps: Applications Development and Systems Development. A potential software developer can start by deciding on his or her focus before embarking on this career path. With adequate programming knowledge and resources, a product that caters to the audience needs can be created.

See also[edit]

References[edit]

  1. ^ "Application Development (AppDev) Defined and Explained". Bestpricecomputers.co.uk. 2007-08-13. Retrieved 2012-08-05. 
  2. ^ DRM Associates (2002). "New Product Development Glossary". Retrieved 2006-10-29. 
  3. ^ Steven P. Reiss (2001). Consistent software Evolution mandatory. Department of Computer Science Brown University. 
  4. ^ a b Joseph M. Morris (2001). Software Industry Accounting. p.1.10
  5. ^ Alan M. Davis. Great Software Debates (October 8, 2004), pp:125-128 Wiley-IEEE Computer Society Press

Further reading[edit]

  • Edward Kit (1992). Software Testing in The Real World.
  • Jim McCarthy (1995). Dynamics of Software Development.
  • Dan Conde (2002). Software Product Management: Managing Software Development from Idea to Product to Marketing to Sales.
  • A.M. Davis (2005). Just enough requirements management: where software development meets marketing.
  • Edward Hasted. (2005). Software That Sells : A Practical Guide to Developing and Marketing Your Software Project.
  • Luke Hohmann (2003). Beyond Software Architecture: Creating and Sustaining Winning Solutions.
  • John W. Horch (2005). "Two Orientations On How To Work With Objects." In: IEEE Software. vol. 12, no. 2, pp. 117–118, Mar., 1995.
  • John Rittinghouse (2003). Managing Software Deliverables: A Software Development Management Methodology.
  • Karl E. Wiegers (2005). More About Software Requirements: Thorny Issues and Practical Advice.
  • Robert K. Wysocki (2006). Effective Software Project Management.
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