The approach of this model is to optimize every phase step in which a large cost will be incurred by doing some activities repeatedly. The spiral model emphasizes more on getting and setting up the requirements completely before proceeding to the next step. So the main purpose of the spiral model is to save money as much as possible during each phase of SDLC. As I have already mentioned above, the main purpose of developing the spiral model is to save money and time at each phase step in the SDLC process.
But before going forward let me clarify that when I say cost here, it means both cost of time as well as money. The main goal is to optimize the overall cost of the software development process.
But if the spiral model is used, the majority of these efforts can be reused at later phases. So what will happen in practice? The moment requirements are gathered from users, it is stored in the database or any kind of document repository. Then we start designing the software. Once the design is completed then we can extract the design into code. This is how we can save money by using this model. Moreover, there are some other ways to implement the spiral model in order to cut down the cost of each phase step:.
Organize a user group meeting at regular intervals such as weekly or monthly and update them about the latest scenario with respect to project progress. It will reduce the cost of requirement gathering. Do not wait for all requirements to be collected before beginning the design phase. Start with the first requirements which are more critical and go ahead as soon as possible. This can save a lot of development time at each phase step since the majority of work done at one phase can be re-used in other phases.
To summarize, the Spiral model is an effective way to develop any kind of software product as it saves both money and time during each phase step. One more advantage of this model is that a lot of time-consuming activities like requirement gathering, designing, etc can be re-used for the next phase. That is why more and more organizations are adopting this approach than in earlier days.
So we have discussed what exactly is a spiral model is and why we need it in SDLC. But how to use this model effectively?
Well, here are some simple steps to follow while using the spiral model in the SDLC process:. First of all, gather all the necessary user requirements properly. Then go ahead with the development process by extracting design from the business requirements. System design: - It is multistep process which focuses on attributes such as. System coding: - At this step the logical aspect of the design is converted into machine readable form.
Special focus of this step is on logical internals. System testing: - This step of the waterfall model is to uncover the errors and ensure that the defined input can generate expected results. Implementation: - In implementation phase proper schedule of the following aspects is done and then it is implemented. Procurement of hardware. Installation of software.
Recruitment of human ware. Conversion of data structure into required format. Finally operational implementation of the system. Maintenance: - Maintenance step of waterfall model takes care by implementing all types of maintenance of the system such as.
Corrective maintenance for removal of residual errors. Adaptive maintenance for hardware. Perfective maintenance to enhance the quality of the software. Achieving the final product is often costly and time intensive. Additionally, the model is highly customized for each customer so reusing your work is impossible. Agile is a methodology based on the 12 principles outlined in the Agile Manifesto.
It is a mindset rather than a set of strict protocol. Agile was developed to deliver better software more effectively and efficiently than previous methodologies, including Waterfall, through a focus on collaboration, communication, and constant change. The adoption of Agile was swift and continuous. There are several Agile software development models. These models are focused on teamwork, cross-functional collaboration, iterative development, and early customer feedback.
Testing, feedback, and making adjustments allow teams to develop and deliver the best software. The Scrum model is the most popular Agile model. Its iterations of software development are known as sprints. During these weeklong sprints, teams assess the previous sprint, add new features coded and tested functionality , and plan the next sprint.
This occurs until all features have been added and the project is deemed ready for release. Increased collaboration between cross-functional teams and between the organization and the customer reduces the guesswork and errors that often result from insufficient communication.
Additionally, the incremental stages decrease time to market. Enhanced communication reduces time spent resolving errors and increases the likelihood of the end user being satisfied with the product. However, this collaboration does require more input and time from the customer during the process.
If too many features are requested and added, the team risks pushing back deadlines. Unlike the other models, Kanban does not have pronounced iterations. If a team does plan iterations, they are incredibly short sprints, sometimes as short as one day. A Kanban board with sticky notes is used to visually outline the projects and their details, including project owners and progress status. This visualization allows the team to narrow concentration on the most important feature in development at the moment.
Additionally, the Kanban board highlights the room remaining for continual improvement to perfection of features. Although the method of sticky notes on a board helps motivate the team to focus on perfecting the important task at hand, it is a poor way to define and maintain timeframes.
For this reason, planning long projects is very difficult. Since there is no set planning stage, changes can be made at any time. One common disadvantage of Kanban is the lack of timeframes. This issue can be accentuated if changes are made continually. Every model was created with the purpose of improving the software development and delivery process. Today, every software development model works well for specific types of projects.
However, older manual models, like Waterfall, are quickly becoming a thing of the past. IT teams, and businesses at large, must move faster and more effectively to deliver software, please their end-users, and keep up with the competition. A faster, repeatable, and more secure software development process is anchored in automation.
This level of automation and speed is not attainable with many models. As a result, the Agile methodology has become increasing popular. Companies are adopting enabling technologies and processes like continuous integration , continuous delivery , and release automation , and DevOps. In this webinar, three companies share their experiences adopting more agile software development and delivery processes and implementing DevOps.
Watch the recording to see what results they achieved. In my position at Flexagon as a Marketing Generalist, I have the pleasure of helping customers meet their delivery and release automation needs!
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