The ADDIE model is an instructional system with five basic elements: analysis, design, development, implementation and evaluation.
Plans can then be tested and all necessary materials produced for the project. Development is the production of lecture notes, print media, digital media, etc. Prior to full implementation of a project, the project or lesson should be tested so that one can be certain that produced materials are adequate and appropriate for the project.
In implementation, the design is delivered to the learner. Evaluation is a part of this step, to the degree that we gauge the level with which the learners met the desired objectives. Evaluation is a part of each step in the development of instruction. It is the check we place upon ourselves to ensure that we are focused on our goals throughout the process.
There are inherent strengths and weakness in every instructional system. Hard work is required to make any system successful while a lack of planning will sabotage even the best of intentions. An investment of time and expertise is required for successful instructional design. The evidence of hard work and planning are evidenced by the level of learning attained by the students.