What is the term for a decision or plan that can be changed?

The term "tentative" refers specifically to a decision or plan that is not yet finalized and may be subject to change. This word implies a level of uncertainty or the possibility of revision, making it the most fitting choice in this context. Decisions described as tentative are often made with the understanding that new information or circumstances could lead to a different conclusion.

In contrast, terms like "final," "fixed," and "permanent" all convey a sense of conclusiveness and stability, indicating that the decision or plan is set and cannot be altered. A final decision is one that has been reached and is not open to change, while fixed and permanent decisions suggest a long-lasting commitment that does not allow for modifications. Therefore, "tentative" accurately captures the essence of flexibility and the potential for adjustment in decision-making.