addActive: Add an Active Component Event

Description Usage Arguments Value References Examples

View source: R/addActive.R

Description

Modifies an existing fault tree with the addition of an active component event.

Usage

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addActive(DF, at, mttf, mttr, display_under=NULL, tag="", label="",
 name="",name2="",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.

mttf

The mean time to failure. It is the user's responsibility to maintain constant units of time.

mttr

The mean time to repair (restore). It is the user's responsibility to maintain constant units of time.

display_under

Optionally, the ID of a sibling event under an OR gate for vertical alignment of the component node in the graphic display.

tag

A very short identifying string (typically 5 characters or less) uniquely identifying a basic event for minimal cutset evaluation

label

An identifying string for the logic gate. Use of label in ftree.make defines the convention for rest of tree construction.

name

A short identifying string (typically less than 24 characters)

name2

A second line, if needed for the identifying string label

description

An optional string providing more detail for the basic event.

Value

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

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="or")
mytree <- addActive(mytree,  at=1, mttf=3, mttr=12/8760,name="pump failure")

FaultTree documentation built on May 3, 2020, 9:05 a.m.