Analysis:  The most important phase in the ADDIE model is "Analysis". In this phase is where a problem is identified. In addition, "training needs is analyzed, the target audience identified, and the high-level learning goals are listed"(Vulpen).

Design:  In the "design" phase of  the ADDIE model clear objectives are created. These objectives need to be measurable. Also, learning activities are described. In addition, an effective storyboard is created that demonstrates a clear visual representation of the instructional material. 

Development: The development phase can be divided into the four main components which are: developing a prototype, creating the course, ensuring quality, and performing a test run. According to the authors from Trends and Issues in Instructional Design and Technology "development includes preparing student and instructional materials (both print and electronic) as specified during design" (Dempsey & Reiser, 2018, p.24).

Implementation: The implementation phase is very important since in this phase the instructional material that was created in the design phase is finally implemented. 

Evaluation:  In the evaluation phase the results of the instructional material  are highlighted. In addition, evaluation includes both formative and summative evaluation. Dempsey & Reiser (2018) highlighted "formative evaluation involves collecting data to identify needed revisions to the instruction, while summative evaluation involves collecting data to assess the overall effectiveness and worth of the instruction" (Dempsey & Reiser, 2018, p.24).