In this article, I will explain the differences, I will also explain why learning how to emphasize achievements can allow your project to become a success. It is first important to understand the definitions of activities and achievements in the context of the project management process.Activities can simply be defined as methods that are used to achieve a desired goal. Achievements can be defined as the goals that activities are used to achieve.Even though the two concepts are different, they are still interconnected. The project managers who truly understand the difference between the two will have a powerful advantage over those who do not.chievements can be defined as the goals that activities are used to achieve. Even though the two concepts are different, they are still interconnected. The project managers who truly understand the difference between the two will have a powerful advantage over those who do not.