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DIFFERENT TYPES OF SOFTWARE DEVELOPMENT
METHODOLOGIES
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Software Development Methodologies

• In the simplest of terms, a software development
  methodology is the basic framework using which
  software developers can plan, Top Software
  Development Companies structure and control the
  overall process of developing a software or
  information system.
• Software project methodologies are especially
  important, since it helps answer the following
  important questions -
• Which tools do the developers want or need?
• Which development approach should be taken and
  why?
• The correct way to implement the development
  approach
• Refine the requirements in order to streamline
  the overall process

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Waterfall Software Development Methodology

• A traditional approach towards software
  development, the Waterfall model delineates a
  rigid and linear approach towards the overall
  development lifecycle. Each phase of the
  development has distinct goals, and once a phase
  is completed, there is no turning back. As a
  result, although in theory this model encourages
  managerial control and departmentalization, but
  in practice its rigid nature does not allow room
  to accommodate the inevitable changes that crop
  up in many projects.

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Spiral Methodology

• The spiral model places more emphasis on risk
  analysis and early identification of risks.
  Projects based on the spiral model generally
  start on a small scale, thereby letting the
  people involved explore all the risks involved
  and make a suitable plan based on them. Instead
  of focusing on project speed, this methodology
  aims at reducing perceived risks, while at the
  same time leading to rapid development times
  because the developers can work freely without
  worrying about the risks involved.

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Agile Software Development Methodology

• The Agile framework is one of the more popular
  conceptual methodologies for undertaking software
  development projects. The main aim of this
  software project methodology is to reduce risk by
  developing software in short bursts or
  iterations, typically lasting between one to four
  weeks. Agile is an incremental model wherein an
  iteration is like a miniature project, including
  everything from planning, requirement analysis,
  coding, design, documentation, and testing.

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Rapid Application Development (RAD) Methodology

• The RAD methodology lays major emphasis on the
  project speed and faster development times and is
  extremely well-suited for the development of
  limited-distribution custom software or in-house
  business software development. Rapid application
  development proposes that products can be
  developed in a faster and more efficient manner
  by -

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Lean Development Methodology

• The Lean development methodology focuses on the
  creation of software which is inherently
  change-tolerant. Its originator, Bob Charette,
  mentioned that the overall goal of Lean
  development is to build software with one-third
  the human effort, one-third the development
  hours, and one-third the investments required
  when compared to what most CMM Level 3
  organizations would achieve.

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Rational Unified Process (RUP) Methodology

• The Rational Unified Process methodology is aimed
  at capturing modern software development best
  practices in a single unified package. RUP also
  supports an iterative model approach, whereby
  project managers can take into account the
  changing project requirements and suggest
  modifications as necessitated. All project
  elements are integrated progressively over time,
  allowing developers enough time to fine-tune the
  software, and all risks are addressed during
  integration can be mitigated early during the
  development phase.

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