Decision filters are simple questions that help organizations distribute decision making by sharing strategy with those who have to act to make them happen.
The business value model is a technique for making critical organizational decisions in an informed and timely manner. Teams using this tool identify the most critical decisions they face, determine when they need to make those decisions, and figure out which information they need to best make those decisions.
The constraints matrix is a quick way to show the relative importance of a set of constraints facing a project team. Each row represents a general constraint faced by most teams. The most common set to use are: Cost, Time, and Scope (ie the Iron Triangle). The columns represent the amount of change that can be accepted for each constraint when trying to deal with an overall project change.