SCRUM, AN OPERATIONAL VISION

  

Traditional projects

       are based on the PMBOK, they are fully planned.  

Schedule, scope, risk, etc are calculated to entire project with the maximum possible precision, so that, when ready, it is only necessary to execute.

On the scrum projects, 

      it isn't fully elaborated. 

The product is divided on subproducts and put them in a pile,
called product backlog.

The scrum master is who coordinates the project. He or she knows the product to be delivered.

Backlog is executed second one priority order determinated by product owner.

At each determined fixed period of time, called sprint, normally four at six weeks, the dev team, who executes the project, meets and defines the execution of the next subproducts from the pile to next sprint, it is the sprint backlog. 

They also evaluate the subproduct made in the
last sprint and they deliver it to customer, called product owner. 

The dev team, in each sprint, evaluates the schedule, scope, risk, etc.