Another popular software development process that combines elements of both, design and prototyping-in-stages
is the Spiral Model. It is built to combine advantages of top-down and bottom-up concepts. Spiral Development Model is also known as, Spiral Lifecycle Model. In other words, it is a Systems Development Method (SDM) which is intended for
large, expensive and complicated projects.
Ideally, the Spiral method has four major stages. They are: planning, risk analysis, engineering, and customer evaluation. Each cycle starts with a planning stage to determine the objectives, alternatives and hindrances of a particular project. This initial stage also defines the customer requirements for large and mission-critical projects. The next stage is risk analysis, which examines the alternate attempts to identify and resolve potential risks. Later, comes the engineering stage which includes, prototyping, developing and testing the products. Finally, comes the customer evaluation phase where the client assesses products.
Hidden Brains understands the various advantages of such delivery model to gain maximum client gratification. This model helps in continual development by managing emerging risks. Its flexibility in design allows changes to be implemented at different stages of the project. The easy process of creating large systems in small segments makes it easier for cost calculations. Spiral model also involves clients at each step. Thus, the clients get the control over the direction and implementation of the projects.
An ideal for complex and mission critical projects, Spiral methodology gives the clients approval and documentation control. It also gives the flexibility to impart additional functionality at a later date and that too quickly and more efficiently.