RAD or rapid application development model
A kind of incremental model. Appeared in the late 80s and became one of the opportunities for creating an agile development process.
The consumer is involved in the process at the very stage of development of the pathogen - he participates in the development and evaluation of the state of the product. A mandatory requirement of this model is that the project should be easily broken down into small parts, which, if necessary, can be created by other numerous teams.
The advantage of this development model is speed. Cons: funding.
Agile
The agile development model that most IT projects work on today. The result is revealed after each iteration, which can lead to changes in the intended vision of the product at almost any point in the work - based on what functionality the users of your product like best.
The disadvantages of such models are that the finished product may never come out on the market, you will constantly be engaged in its improvements, additions, in the meantime the budget may run out. Pros - to start working on a product, you do not need to receive information about what you want to receive at the end. No needTake the entire budget and calculate all the risks.
Agile has many variations and frameworks. Among the most common: Scrum, Kanban, Extreme Programming (XP), Lean.
