Related Topics:
	Analytical Plots

Setting Confidence Bounds

Where applicable, you can add confidence bounds to a plot by choosing Plot > Confidence Bounds > Confidence Bounds. The Confidence Bounds Setup window will appear, allowing you to define the properties of the confidence bounds lines to be displayed on the plot.

Note: Confidence bounds are available for the Unreliability vs. Time, Reliability vs. Time and Failure Rate vs. Time plots in cases where all blocks that can fail in the diagram use models that have Fisher matrix bounds. To have Fisher matrix bounds, a model must have been created by publishing from a data source, such as a Weibull++ or ALTA data sheet, that was calculated using Fisher matrix bounds. Additionally, bounds are not available if the diagram has containers, subdiagrams or mirrored blocks, or if any block uses the cumulative damage model.

• Sides allows you to specify which lines will be displayed on the plot.

• • None if selected, confidence bounds will not be displayed on the plot.

Note that you can also remove confidence bounds from your plot by choosing Plot > Confidence Bounds > Hide Confidence Bounds.

• • Two-Sided displays two-sided confidence bounds on the plot.

  • One-Sided displays one-sided confidence bounds on the plot. You can select one type or both types.

  • • Show Top displays the top line for one-sided confidence bounds on the plot.

    • Show Bottom displays the bottom line for one-sided confidence bounds on the plot.

• Type allows you to specify which types of confidence bounds you want displayed on the plot. You can select one type or both types. This area is not available for Failure Rate vs. Time plots.

• • Time (Type I) displays the confidence bounds on time.

  • Reliability (Type II) displays the confidence bounds on:

  • • Reliability for Reliability vs. Time plots

    • Unreliability for Unreliability vs. Time plots

1. • Both displays both types.

• Confidence Level % allows you to set the percentage for the confidence bounds.

• Resolution allows you to specify the resolution of the confidence bounds lines on the plot by dragging the slider or, for fine adjustments, clicking the slider and then using the arrow keys. The number of points plotted to create the lines is displayed beside the field name.