Best System Development Life Cycle Approach

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In the 80s and 90s, the waterfall model was used to be adopted to successfully develop and deliver the project to clients. With rapid advancement in the field of software development and popularity of internet, many organizations have begun to move towards increasingly adaptable life cycles, for example spiral, agile, iterative etc. These new life-cycle strategies give greater adaptability and accelerate the rapid pace of project development by giving the advantages to the companies to be first to deliver the project in a quality manner. SDLC is one of the main topics of assignment given by Charles Sturt University (CSU) to students to enhance their knowledge and performance, which directly impacts Charles Sturt University Ranking as well.

Some of the most popular SDLC models are described below:

Waterfall Model

The waterfall model can be described as a sequential development model with clearly defined deliverables for each phase. Many organizations follow reviews and audit processes in order to gather the requirements of the project in an effective manner. Audit and review processes help them to fulfil all the criteria to move to next phase of development.

Iterative and Incremental

The basic objective of the iterative development is the constant construction of system modules, starting from basic fractions of the systems and gradually including more highlights until the whole system is not complete. Unlike the waterfall, iterative development allows it to adapt to new requirements or changes into the project. In addition, it gives space to make improvements into the mistakes that have been learned in previous iterations.


Agile methodologies have emerged from the need to develop software project that may require rapid development of the Internet. In some ways it is a variant of the iterative life cycle, in which all deliverables of the project are submitted in stages. The basic contrast is that agile model have a software delivery time of months to weeks. Software development companies are adopting this methodology to successfully deliver the project within weeks instead of months.

Following are the some of the factors on which project managers have to look before the selection of any SDLC model:

Requirements Stability

One of the most important variables that manage your decision about the project life cycle model is the clarity and stability of the project's initial requirements. Changes in the requirements after the start of the project may affect the performance of project development. In such cases, choose an agile or iterative methodology in light of the fact that each of them gives you the opportunity to meet the new requirements even after the task begins.

Time line for the project

Experienced managers will brighten up solid calendars, reducing the requirements and deliverables of the project. The iterative method achieves this by offering the possibility of early transmission of partial functionalities. It seems that the project is moving despite a better time line. While the general deliverables of the project is not shortened, there are open doors to deliver only key features of the project, which are essentially required by the clients and their business requirements.

Project Size

Generally large enterprise project requires large number of project teams and resources in order to clearly define the deliverable of the project. All the deliverables of the project is based on its size. As large or complex project cannot be effectively done by waterfall model. Therefore, it is essential for project manager to choose agile or incremental approach in order to successfully deliver the project.