Assign programming tasks to each developer

Each developer owns his own component.
The task should be large enough to keep the developer busy for at least a few days, but can last longer than several weeks as well.
Ideally, each developer should be given a separate exe or dll to work on in order to minimize collisions with other developers.
If the same exe or dll needs to be worked on by two or more developers, then try to minimize collisions by assigning them to work on different classes.
If the same class must be worked on, then try to have them work on different methods.
Shoot for rarely if ever having two or more developers work on the same class at the same time.