Distribution of (a) settlement achieved at t_max and (b) of the OCR at unloading for the optimal heuristic strategies (see Table 3). The area of the histograms to the left of the dotted line represents for each optimal heuristic strategy, in (a) the probability $Pr(Stmax<starget)$⁠, and in (b) the probability $Pr(OCRfin<OCRtarget)$⁠. A full-colour version of this figure can be found on the ICE Virtual Library (www.icevirtuallibrary.com)