02 Jul 6 most used software development models for projects
02 JuLY 2021
Software Development Life Cycle (SDLC) in the early phase of the development process from where the business requirements are realized and converted as functions and features of the software to achieve the needs. Every SDLC model is selected based on the context of project requirements. Hence, one should know the importance of SDLC to choose and implement the best process to achieve the required objectives.
Software development models define the stages and orders of the process, so the most used and popular models are:
- Waterfall Model
- Prototype Model
- V Model
- Spiral Model
- Agile Model
This is the earliest of all methodologies where each activity is represented as a separate phase waterfall model is linear in its behavior and flows steadily downwards through its steps where the next step can only be started after ending the previous step.
Waterfall models are useful for small and mid-sized projects which are clear, cost-effective, and remain unchanged.
The waterfall model contains:
- Requirement analysis
The prototype model is used when the customer does not know the exact project requirement, this model is used to replicate the software model which is shown to the clients as the end product, and feedbacks are recorded to refine as per requirements, where this cycle is repeated until the final acceptance.
This model allows customers to view and make changes in products before going live and this iteration is continued with the different sub-models until the product is satisfied:
- Rapid throwaway Prototype
- Evolutionary prototyping
- Incremental Prototyping
- Extreme prototyping
V-model also called the verification and validation model which is the derivative of the waterfall model having testing phase for each developing stage where this model is useful when the requirements are very clearly defined, and development tools are well known. This model is used over the Waterfall model due to its success rate when compared.
V-model is easy to use, verification and validation at the early stage of the model ensure zero project failures and downtime with its corresponding testing activities. Mistakes in the requirements, code, and architecture can be easily detected at the early stage with exceptional quality control.
The model derived to handle risk during the development process is the spiral model, this model looks like a spiral with loops where loops depend on the type and size of the project. Each loop is called a phase of the software development this model combines the waterfall model and prototyping model which is used in large, complex, and expensive projects.
In this model each loop is divided into 4 parts where at each part objectives are determined, risks are resolved, developed, and verified along with planning the future loops. The spiral model helps companies estimate budget, time, and risk factors at the initial stage by avoiding issues and time consumption.
This model is based on iterative and incremental development and considered as a realistic development approach, there are iterations in the agile model where ongoing testing and releasing is produced with incremental changes from previous releases is conducted by dividing a product into cycles.
In this model sprints are planned with the requirements for iterative software development to support business unpredictability, the primary goal of the agile methodology is to respond to changes and to bring collaboration between self-organizing cross-functional teams.
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