addControl: Add a Mitigating Control an Event Tree

In EventTree: Event Trees for Hazard and Risk Analysis

Description

Modifies an existing event tree with the addition of a mitigating control node.

Usage

addControl(DF, at, prob, severity, name="", description="", overwrite=FALSE) 

Arguments

DF	An event tree dataframe such as returned from etree.make or subsequent addCtrl functions.
at	The ID of the parent node for this addition.
prob	The probability of success for this mitigating control
severity	Severity level upon successful outcome of this control. Severity does not enter into any calculation, but will be passed down to complimentary hazard states.
name	A short identifying string
description	An optional string providing more detail for the mitigating control action.
overwrite	A logical entry indicating whether this control should overwrite the 'hazard' outcome it is connecting to.

Value

Returns the input event tree dataframe appended with entry rows for the defined control and its complimentary hazard state.

References

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

Examples

mytree <- etree.make(name="conveyor belt fire")
mytree <-addControl(mytree,at=1, prob=.99, severity=.9, name="heat sensor detects")

EventTree documentation built on May 2, 2019, 6:10 p.m.