Enum Class VotingLogic

java.lang.Object

java.lang.Enum<VotingLogic>

neqsim.process.logic.sis.VotingLogic

All Implemented Interfaces:

Serializable, Comparable<VotingLogic>, Constable

public enum VotingLogic
extends Enum<VotingLogic>

Represents a voting logic pattern for Safety Instrumented Systems (SIS).

Voting logic determines how multiple redundant sensors or detectors are combined to make a safety decision. Common patterns include:

• 1oo1 (1 out of 1): Single sensor must trip
• 1oo2 (1 out of 2): At least 1 of 2 sensors must trip
• 2oo2 (2 out of 2): Both sensors must trip
• 2oo3 (2 out of 3): At least 2 of 3 sensors must trip (common for high reliability)
• 2oo4 (2 out of 4): At least 2 of 4 sensors must trip

Voting patterns balance:

• Spurious trip rate (false alarms)
• Probability of failure on demand (missed real events)
• System availability vs. safety integrity

Version:

1.0

Author:

ESOL

Nested Class Summary

Nested classes/interfaces inherited from class Enum

Enum.EnumDesc<E>

Enum Constant Summary

Enum Constants

Enum Constant	Description
ONE_OUT_OF_ONE	1 out of 1 - Single sensor/detector.
ONE_OUT_OF_TWO	1 out of 2 - At least one of two must trip.
THREE_OUT_OF_FOUR	3 out of 4 - Higher safety integrity than 2oo4.
TWO_OUT_OF_FOUR	2 out of 4 - High redundancy, very high availability.
TWO_OUT_OF_THREE	2 out of 3 - Standard for high reliability applications.
TWO_OUT_OF_TWO	2 out of 2 - Both sensors must trip.

Field Summary

Fields

Modifier and Type	Field	Description
private final String	notation
private final int	requiredTrips
private final int	totalSensors

Constructor Summary

Constructors

Modifier	Constructor	Description
private	VotingLogic(String notation, int requiredTrips, int totalSensors)	Creates a voting logic pattern.

Method Summary

Modifier and Type	Method	Description
boolean	evaluate(int trippedCount)	Evaluates if the voting condition is met given the number of tripped sensors.
String	getNotation()	Gets the standard notation for this voting pattern.
int	getRequiredTrips()	Gets the number of sensors required to trip for activation.
int	getTotalSensors()	Gets the total number of sensors in the voting group.
String	toString()
static VotingLogic	valueOf(String name)	Returns the enum constant of this class with the specified name.
static VotingLogic[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, valueOf

Methods inherited from class Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

ONE_OUT_OF_ONE

public static final VotingLogic ONE_OUT_OF_ONE

1 out of 1 - Single sensor/detector. High spurious trip rate, lowest cost.

ONE_OUT_OF_TWO

public static final VotingLogic ONE_OUT_OF_TWO

1 out of 2 - At least one of two must trip. Lower spurious trips, higher safety.

TWO_OUT_OF_TWO

public static final VotingLogic TWO_OUT_OF_TWO

2 out of 2 - Both sensors must trip. Very low spurious trips, but lower safety integrity.

TWO_OUT_OF_THREE

public static final VotingLogic TWO_OUT_OF_THREE

2 out of 3 - Standard for high reliability applications. Good balance of safety and availability.

TWO_OUT_OF_FOUR

public static final VotingLogic TWO_OUT_OF_FOUR

2 out of 4 - High redundancy, very high availability.

THREE_OUT_OF_FOUR

public static final VotingLogic THREE_OUT_OF_FOUR

3 out of 4 - Higher safety integrity than 2oo4.

Field Details

notation

private final String notation

requiredTrips

private final int requiredTrips

totalSensors

private final int totalSensors

Constructor Details

VotingLogic

private VotingLogic(String notation,
 int requiredTrips,
 int totalSensors)

Creates a voting logic pattern.

Parameters:

notation - standard notation (e.g., "2oo3")

requiredTrips - number of sensors that must trip

totalSensors - total number of sensors

Method Details

values

public static VotingLogic[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static VotingLogic valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null

getNotation

public String getNotation()

Gets the standard notation for this voting pattern.

Returns:

notation string (e.g., "2oo3")

getRequiredTrips

public int getRequiredTrips()

Gets the number of sensors required to trip for activation.

Returns:

required trip count

getTotalSensors

public int getTotalSensors()

Gets the total number of sensors in the voting group.

Returns:

total sensor count

evaluate

public boolean evaluate(int trippedCount)

Evaluates if the voting condition is met given the number of tripped sensors.

Parameters:

trippedCount - number of sensors currently tripped

Returns:

true if voting condition is satisfied

toString

public String toString()

Overrides:

toString in class Enum<VotingLogic>