Safety Factor Histogram

The Safety Factor Histogram represents the distribution of calculated Safety Factors for all valid wedges generated by Probabilistic analysis in RocPlane.

Failed wedges (i.e. Safety Factor < 1) are highlighted by the red bars at the left of the Histogram.

The Probability of Failure in RocPlane is defined as the Number of Failed Wedges divided by the total Number of Samples.

• If any wedges have failed, then the Probability of Failure will be > 0.
• If NO wedges have failed, then the Probability of Failure = 0.

Mean Safety Factor

You will notice the mean, standard deviation, min and max values displayed below the histogram.

It is important to note that the Mean Safety Factor from a Probabilistic analysis will not necessarily be equal to the Deterministic Safety Factor based on the mean Input Data values. In general, these two values may be slightly different. For a very large number of statistical samples, the two values should approach the same value.