A milestone definition is important for a project to be executed successfully. This is the because milestone helps to gets answers to questions like what is to be delivered, when it should be delivered, what the current status of the development is, what the show stoppers are, and so on. These questions help the consultant and the client to keep an eye on the project and continuously measure its activities.

Requirement gathering helps the consultant to define these measurable milestones and individual tasks according to the known deliverables. Once the consultant knows what needs to be delivered, he can easily define the tasks which need to be carried out to execute the project. For example, a milestone can be Data modeling, within which the sub-tasks can be integration and connection to the data sources, data fetching (logic generally called the extraction process), incremental logic, QVD generation, data modeling, and so on.