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Development always has one key goal and a list of tasks.

A relevant methodology helps a business to achieve it as efficiently as possible. It focuses on individual project indicators, timing, the scope of work and budget.

Waterfall is one of the most famous development models. This is a traditional development model. It implies a sequential transition from one stage to another without turning back.

The point is that the entire development process is structured in cycles. So if you need to begin the next, you need to complete the tasks of the previous one. You cannot skip one of the stages to deal with this later.

This is an important characteristic and should be considered. Any changes are possible only after the project release.

Waterfall Phases:

  • Requirements Analysis.
  • Planning.
  • Structural design. 
  • Product implementation. 
  • Writing program code. 
  • Testing. 
  • Release. 
  • Technical support.


  1. Tasks are clear to everyone in the team. They are unchanged from the beginning to the end of the project.
  2. Clearly structured plan and well thought out documentation. 
  3. A reporting system that you can track risks and understand where resources and time are spent.


  1. Testing at the end. Due to it, it is impossible to identify current errors.
  2. All requirements must be formed, processes formalized, risks foreseen, and tasks approved from the outset.
  3. The client will see the result not earlier than the release stage. Further changes require additional time and money.
  4. The process is formalized with clear and rigid frameworks that are determined in advance.

When is Waterfall methodology relevant? 

  1. If a client has clear requirements and product vision.
  2. If a product doesn`t require testing.
  3. If technologies and tools are known in advance.

Before choosing an approach you need:

  • to know well the advantages and disadvantages of your product;
  • to set clear requirements before development;
  • to take into account the recommendations of business analysts and project managers.