Sr.No.

Waterfall

Spiral

1

In the software development life cycle, business requirements are frozen after the initial phase.

In the spiral model, requirements are not frozen by the end of the initial phase. It is kind of executed in a continuous mode.

2

In terms of project execution, there is a high level of risk and uncertainty because of the missing stringent risk management.

By design, the spiral model is modeled to handle better risk management

3

The Waterfall framework type is more of a linear sequential model.

The framework type of the spiral model is based on an iterative process; within each iteration, the linear model is preferred.

4

As the user involvement is only at the beginning of the process, it turns down communication between the customer and developer throughout the development cycle.

User involvement and communication is at a high-degree level between the end user and the engineer.

5

As the model is kind of one-time execution, the reusability factor is least possible here.

During execution of the multiple iterations, the possibility of reusability is quite necessary and developed by nature.