RAM Commander User Manual

To initiate a Monte Carlo simulation

To initiate a Monte Carlo simulation

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To initiate a Monte Carlo simulation

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1.Activate the RBD diagram window.
2.From the RBD menu, choose Monte Carlo configuration:

RBD_MonteCarloConfig

3.In the Monte Carlo Configuration dialog box, enter the configuration values:

Start time

Starting time for collection of results. (The simulator always starts at time t = 0.)

Max Time

Elapsed time for collecting results

# of points

Number of intervals in output graph

Report

Text, graph or both

Identical

If selected, simulation assumes that if multiple blocks are identical (have the same Ref.Des. value) it is actually the same single block even if it appears multiple times on the diagram.

Conf. Level

Confidence level of the output

Simulation

Fast (least number of iterations = 100), Intermediate (medium number of iterations = 1000), Accurate (most number of iterations = 10000), Custom - number of iterations defined by user

Seed

Seed for random number generator

Inspection period

Inspection Period value = 0

Element sent to repair upon component failure (default).

 

Inspection Period value > 0

Element checked every [Inspection Period] hours. If failed, sent to repair.

RAM Commander applies the value in the Inspection period field to all RBD elements that do not have a defined inspection time (marked as ---) in the Element parameters definition dialog box.

4.Choose OK.
5.From the Calculation menu, choose Monte Carlo.
6.RAM Commander conducts the simulation and displays resulting report and graph:

RBD_MonteCarloResults

The report contains Reliability (reliability is a probability of failure at time t) and Availability (probability that the system is operating at time t) figures for each selected time point (according to Monte-Carlo settings, max.time and number of points). For Reliability and Availability, upper and lower limit estimation according to Confidence level selected on Monte-Carlo configuration screen. MTBCF (mean time between critical failures) is also calculated.

You may view, print, save, customize and export the generated report and graph (see Fundamentals - Reports and Graphs).