addProbability: Add a Pure Probability

Description Usage Arguments Value References Examples

Description

Modifies an existing fault tree with the addition of a pure probability.

Usage

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addProbability(DF, at, prob, name="", description="")

Arguments

DF

A fault tree dataframe such as returned from ftree.make or related add... functions.

at

The ID of the parent node for this addition.

prob

A probability value >0 && <1

name

A short identifying string

description

An optional string providing more detail for this probability.

Value

Returns the input fault tree dataframe appended with an entry row for the defined probability.

References

Nicholls, David [Editor] (2005) System Reliability Toolkit Reliability information Analysis Center

O'Connor, Patrick D.T. (1991) Practical Reliability Engineering John Wiley & Sons

Vesely, W.E., Goldberg, F.F., Roberts, N.H., Haasl, D.F. (1981) Fault Tree Handbook U.S. Nuclear Regulatory Commission

Vesely, W.E., Stamatelato, M., Dugan, J., Fragola, J., Minarick, J., Railsback, J. (2002) Fault Tree Handbook with Aerospace Applications NASA

Doelp, L.C., Lee, G.K., Linney, R.E., Ormsby R.W. (1984) Quantitative fault tree analysis: Gate-by-gate method Plant/Operations Progress Volume 3, Issue 4 American Institute of Chemical Engineers

Examples

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mytree <-ftree.make(type="and", name="common cause failure of redundant pumps")
mytree<-addActive(mytree,at=1,mttf=3,mttr=12/8760, name="Pump")
mytree <- addProbability(mytree,  at=1, prob=.05, name="common cause beta factor")

ftree documentation built on May 2, 2019, 4:41 p.m.