The following tables present the time-to-failure data for these modes (in hours).
Step 1: Using Weibull++, the first step is to create a new data sheet for grouped times-to-failure data with suspensions.
Step 2: Rename the folio to "Component" and the data sheet to "Mode A." Enter the data given for Mode A and use the 2-parameter Weibull distribution with MLE to calculate the parameters, as shown next.
Step 3: Insert another data sheet of the same type named "Mode B," enter the data given for Mode B and calculate the parameters. Repeat for the remaining failure modes.
Step 4: Choose Home > Insert > Diagram.
Step 5: Build the RBD that describes the reliability-wise configuration of the failure modes, as shown next.
Note that the node in the diagram requires 2 of the 3 paths to succeed.
Step 6: Click Calculate to analyze the diagram.
Then use the Quick Calculation Pad (QCP) to calculate the reliability at 100 hours with the lower 1-sided 90% confidence bound, as shown next.