...the goal of a DECISION WORKSHOP is to find the optimal solution. But that optimality includes making the best use of the available time, which is in most cases limited.
More time spent on a decision process would increase the precision; however, there is usually a deadline by which a decision has to be made.
Therefore:
Clearly indicate when the significant checkpoints will take place. The Dialogue Decision Process could give an idea on when those checkpoints could be.
Dialogue Decision Process
Parnell, G. S., Terry Bresnick, M. B. A., Tani, S. N., & Johnson, E. R. (2013). Handbook of Decision Analysis (Vol. 6). John Wiley & Sons.