Selected simulation outputs were charted for a single iteration to show what a specific instance of each model might look like (Figure 3). Simulation of each probabilistic model was then repeated for 1,000 iterations to illustrate the extent to which buffer sizes and progress of activities vary. Figure 4 (Top Left) shows the superimposed commodity curves. Value ranges on percent complete of Area Done at any time are denoted by a solid line for the mean value, and long and short dashes respectively for the mean plus-or-minus 1-or-2 standard deviations. Figure 4 (Top Right, Bottom Left, and Bottom Right) shows the mean plus-or-minus 1-or-2 standard deviations for the number of Staged Spool, and, as labeled, the standard deviation (SD). Values were collected every 25 days.