Clients can clearly see their projects simplified into achievable sprints or iterations with progressive development marked down onto a timeline. At the same time, the Scrum model offers a framework within which the team can take various decisions as and when required.

Clients would have not only an understanding, but also certain amount of control, over the progress during the development process.

Scrum development allows quick delivery of scheduled tasks compared to other traditional approaches and gives the client the flexibility to change project specific priorities and requirements at ease.

Transparency in communication with all project stakeholders including the Client and the team is extremely important which helps increase productivity and overall efficiency leading to better results and timely project deliveries.

The Spiral Model is intended for large, expensive and complicated projects where continuous risk evaluation is needed.

There are 4 major parts to each loop – planning, risk analysis, engineering, and customer evaluation.

Step 1: Planning

In each loop, the first stage is the planning stage to determine the objectives, alternatives and obstacles after customer requirements are defined.

Step 2: Risk Analysis

Risk analysis is the most important phase in this development model. Hence, it requires expert people. Alternate procedures are defined to resolve potential risks before they arise.

Step 3: Engineering

All the engineering stages of designing, development and testing are done.

Step 4: Customer Evaluation

Finally, the customer evaluates the product and gives his feedback. The project loop is completed; but the project isn’t. These loops are repeated in a spiral format until the client is satisfied with the product at the last stage and all issues related to the product are resolved.

Linear processes are fixed before the start of a phase with scheduled timelines and results. A fixed sequence of stages is followed from requirement understanding to development planning, design, implementation, testing, deployment, and support and maintenance. This model allows a very swift flow.

Step 1: Designing

Right from conceptualization of process flow to operation and maintenance, every stage of the complete project is analyzed, and each and every operational procedure is defined. A simple, easy to understand document is generated accordingly.

Step 2: Documentation

All processes are documented in detail.

Step 3: Redo

Working on a totally original product, everything is done twice before the final version of the project is delivered at the clients’ system.

Step 4: Plan, Control, Monitor – Testing

The greatest challenge (and risk), in terms of time and money, is testing, as it happens at the last stage when it is not possible to turn back.

Step 5: Client

Finally, the client gets involved for the closure of the project. Reviews after each process decide the quality assurance and changes in requirement. This model is used when the requirements, total costs involved, the resources required and the overall specifications of the project are clearly defined. A schedule with deadlines for each stage of development is set up for final delivery of projects to clients on time.