Predictive methods are primarily those that envisage a single future considered most likely, whether this future is desirable or not. To this extend, a deterministic method may or may not be normative. The methods stemming from the forecasting and from the planning schools of thought are mostly predictive.
Open methods envisage different possible alternative futures. Open methods are usually exploratory but this is not necessarily the case if alternative ways of reaching a desirable future are considered.
Core Foresight methods are essential open.