Every argument must come to an end or no point can be made. The same is true for stories. For an author to explore an issue, a limit to the scope of the argument must be established.

To establish how much ground the argument will cover, authors limit the story by length or by size. Timelocks create an argument in which “anything goes” within the allotted time constraints. Optionlocks create an argument that will extend as long as necessary to provide that every specified issue is addressed.

By selecting the kind of limit at work in your story, you lock down either the duration of the argument (Timelock), or the ground covered (Optionlock).

Excerpted from
Dramatica Story Development Software