Three sample trajectories for a strategy parameterised with heuristic 2A (DS #2), with h₀ = 0·95 m, h₁ = 1·04 m and s_th = 0·77 m. The time at which the curves intersect with the level s_target corresponds to t_target. For t_max = 72 (weeks), it can be seen that only one of these trajectories satisfies t_target < t_max and does not lead to project delay