Final answer:
There are several coding models beyond the waterfall and agile models, including the spiral model, V-Model, and RAD model. These models involve iterative processes and focus on improving the design through evaluation, prototyping, and changes based on feedback.
Step-by-step explanation:
There are several coding models or systems beyond the waterfall and agile models. Three of these models are the spiral model, V-Model, and RAD model.
The spiral model is a design process that involves making changes to the design and then evaluating the improved design. It is an iterative process where each loop in the spiral requires time and resources. The advantage is that the end design is often better than the initial design, but the disadvantage is that it may easily lead to delays and budget overruns if not planned properly.
The V-Model is a software development model that emphasizes verification and validation at each stage of development. It follows a sequential process where each step builds on the previous one. The strengths and weaknesses of the design are better understood through prototyping and evaluation, leading to changes in the design.
The RAD model stands for Rapid Application Development. It is an iterative and incremental software development model that focuses on delivering a working product quickly. The development process involves prototyping, testing, and making changes based on feedback received.