software development methodologies and their application
- 1. Difference Life Cycle Stage Of Software Development Methodologies And Their Application Create By : Madusha Udayangani Esoft Metro campus (kurunegala) HND 15 10086
- 2. What are the Software Development Models?
- 3. The development models are the various processes is being selected for the development of the project depending on the project’s aims and goals. There are many development life cycle models that have been developed in order to achieve different required objectives. The models specify the various stages of the process and the order in which they are carried out. The selection of model has very high impact on the testing that is carried out.
- 4. •Waterfall model •V model •Incremental model •RAD model •Agile model •Iterative model •Spiral model There are various Software development models or methodologies. They are as follows:
- 5. You know deference life cycle stages of software?
- 6. Different companies based on the software application or product, they select the type of development model whichever suits to their application These days in market the ‘Agile Methodology’ is the most used model. ‘Waterfall Model’ is the very old model. In ‘Waterfall Model’ testing starts only after the development is completed Likewise ‘Incremental model’, ‘RAD model’, ‘Iterative model’ and ‘Spiral model’ are also used based on the requirement of the customer and need of the product.
- 8. What is the waterfall model
- 9. The Waterfall Model was first Process Model to be introduced. It is very simple to understand and use this model the testing starts only after the development is complete. The waterfall model describes a development method that is linear and sequential. Waterfall development has distinct goals for each phase of development. Imagine a waterfall on the cliff of a steep mountain.
- 11. Advantages &disadvantages advantage • Simple end easy understand and use. • Phases are processed and completed one at a time. • Work well for smaller projects where requirements are very well understood . Disadvantage • Poor model for long and ongoing projects. • No working software is produced until late during the life cycle. •High amounts of risk and uncertainty. •Not a good model for complex and object-oriented projects.
- 12. •This model is used only when the requirements are very well known, clear and fixed. •Product definition is stable. •Technology is understood. •There are no ambiguous requirements •Ample resources with required expertise are available freely •The project is short. When to use the waterfall model:
- 13. Agile model
- 14. What is Agile Model?
- 15. Agile development model is also a type of Incremental model. Software is developed in incremental, rapid cycles. It is used for time critical applications. Speed up or bypass one or more life cycle phases.
- 16. Some Agile Methods • Adaptive Software development(ASD) • Feature Driven Development (FDD) • Crystal Clear • Dynamic Software Development Method (DSDM) • Rapid Application Development(RAD) • Scrum • Extreme Programming(XP) • Rational Unify Process(RUP)
- 17. Diagram of Agile model:
- 18. Advantages & Disadvantages: Advantages • Customer satisfaction. • Saves time. • Testing. • Suitable for fixed or changing requirement. Disadvantages • Not suitable for handling complex dependencies. • More risk of sustainability , maintainability and extensibility. • Strict delivery management dictates the scope, functionality to be delivered, and adjustments to meet the deadlines.
- 19. When to use the agile model
- 20. RAD Model
- 21. What is the RAD model?
- 22. RAD model is Rapid Application Development model. It is a type of incremental model. In RAD model the components or functions are developed in parallel as if they were mini projects. The developments are time boxed, delivered and then assembled into a working prototype. This can quickly give the customer something to see and use and to provide feedback regarding the delivery and their requirements.
- 25. Advantages & Disadvantages Advantage • Reduces the development time. • Reusability • Speed • Easy to work with Disadvantage • Require highly skilled engineers. • Both the customer and developer should be committed to complete • If it is difficult to modularize, its not work well.
- 26. WHEN TO USE RAD MODEL User involved throughout the life cycle. Project can be time-boxed Functionality delivered in increments.
- 27. Spiral Model
- 28. What is spiral model?
- 29. The spiral model, also known as the spiral lifecycle model, is a systems development lifecycle (SDLC) model used in information technology (IT). This model of development combines the features of the prototyping model and the waterfall model. The spiral model is favored for large, expensive, and complicated projects.
- 30. Framework Type: Combination Linear and Iterative
- 31. Advantages and Disadvantages: Advantages • Large and complicated projects. • Adaptability with changes. • Testing at each phase. Disadvantages • Works on complicated projects only. • An experienced and skilled team are required.
- 32. •When costs and risk evaluation is important •For medium to high-risk projects •Long-term project commitment unwise because of potential changes to economic priorities •Users are unsure of their needs •Requirements are complex •New product line •Significant changes are expected Spiral Model Application
- 33. Discussion Of Difference Life Cycle Stage Of Software Development Methodologies
- 38. Difference between Agile and Waterfall Mode
- 41. Create By : Madusha Udayangani Esoft Metro campus (kurunegala) HND 15 10086