The following are some basic popular models that are adopted by many software development companies.
- System Development Life Cycle (SDLC) Model
- Prototyping Model
- Rapid Application Development Model
- Component Assembly Model
1. System Development Life Cycle (SDLC) Model
This is also known as Classic Life Cycle Model (or) Linear Sequential Model (or) Waterfall Method. This model has the following activities.
- System/Information Engineering and Modeling
Software is perpetually of an outsized system or business, work starts by creating the needs for all system elements and then allocating some subset of these requirements to software.
- Software Requirement Analysis
This process is also known as possibility study. In this phase, the development team visits the customer and studies their system. They examine the requirement for possible software automation in the given system. By the end of the possibility study, the team provides a document that holds the diverse specific recommendations for the candidate system.
- System Analysis and Design
In this phase, the software development process, the software's general structure and its gradations are defined. In terms of the client - server technology needed for the package architecture, the database design, and the data structure design etc. are all helpful in this phase.
The design should be interpret into a machine readable form. The code generation step achieves this task. If the design is executed in a detailed manner, code generation can be accomplished without much complication.
Once the code is generated, after that the software program testing starts. Different testing methodologies are available to unravel the bugs that were committed during the previous phases.
The software will unquestionably experience change once it is delivered to the customer. There can be many reasons for this change to occur. Change could happen because of some surprising input values into the system.
2. Prototyping Model
This is a cyclic version of the linear model. In this model, once the need examination is over and the design for an example is complete, the development process begins. Once the prototype is shaped, it is given to the customer for evaluation. The customer tests the package and gives his/her feed back to the developer who purify the product according to the customer's precise expectation.
3. Rapid Application Development (RAD) Model
The RAD model is linear sequential software development processes that highlight an extremely short development cycle. The RAD model is a "high speed" adaptation of the linear chronological model in which rapid development is attained by using a component-based construction approach. Used primarily for information systems applications, the RAD approach includes the following phases: Business modeling, Data modeling, Process modeling, Application generation, and Testing and turnover.
4. Component Assembly Model
Object technologies supply the technical framework for a component-based procedure model for software engineering. The object oriented paradigm highlights the construction of classes that summarize both data and the algorithm that are used to maneuver the data.
All these different software development models have their own advantages and disadvantages. Nevertheless, in the contemporary commercial software development world, the synthesis of all these methodologies is included.