electre

This module implements the Electre algorithms.

Implementation and naming conventions are taken from [Vin98a].

class IElectre(performance_table)

Bases: Generic[T], ABC

This class represents the common interface between all Electre algorithms

Parameters: performance_table (PerformanceTable[QuantitativeScale]) –

abstract concordance()

Compute the concordance matrix.

Returns: concordance matrix
Return type: AdjacencyValueMatrix[QuantitativeScale]

abstract construct()

Construct the outranking structure.

Returns: outranking structure
Return type: T

abstract discordance()

Compute the discordance matrix.

Returns: discordance matrix
Return type: PartialValueMatrix[QuantitativeScale]

abstract exploit(outranking_structure, **kwargs)

Exploit outranking structure.

Parameters: outranking_structure (T) –
Returns: result
Return type: Any

class IElectre1(performance_table, criteria_weights)

Bases: IElectre[T], Generic[T], ABC

This class implements common methods for Electre I and II.

Parameters

performance_table (PerformanceTable[QuantitativeScale]) –
criteria_weights (Dict[Any, float]) –

concordance()

Compute the concordance matrix.

Returns: concordance matrix
Return type: AdjacencyValueMatrix[QuantitativeScale]

abstract construct()

Construct the outranking structure.

Returns: outranking structure
Return type: T

discordance()

Compute the discordance matrix.

Returns: discordance matrix
Return type: PartialValueMatrix[QuantitativeScale]

abstract exploit(outranking_structure, **kwargs)

Exploit outranking structure.

Parameters: outranking_structure (T) –
Returns: result
Return type: Any

class IElectre3(performance_table, criteria_weights, indifference_thresholds, preference_thresholds, veto_thresholds)

Bases: IElectre[AdjacencyValueMatrix], ABC

This class implements basic Electre III methods shared to other classes.

Parameters

performance_table (PerformanceTable[QuantitativeScale]) –
criteria_weights (Dict[Any, float]) –
indifference_thresholds (Dict[Any, float]) –
preference_thresholds (Dict[Any, float]) –
veto_thresholds (Dict[Any, float]) – missing criteria won’t apply veto

concordance(performance_table=None)

Compute the concordance matrix.

Parameters: performance_table (Optional[PerformanceTable[QuantitativeScale]]) – use performance_table attribute if not provided
Returns: concordance matrix
Return type: AdjacencyValueMatrix[QuantitativeScale]

abstract construct()

Construct the outranking structure.

Returns: outranking structure
Return type: T

credibility(performance_table=None)

Compute the credibility matrix.

Parameters: performance_table (Optional[PerformanceTable[QuantitativeScale]]) – use performance_table attribute if not provided
Returns: credibility matrix
Return type: AdjacencyValueMatrix[QuantitativeScale]

discordance(performance_table=None)

Compute the discordance matrix.

Parameters: performance_table (Optional[PerformanceTable[QuantitativeScale]]) – use performance_table attribute if not provided
Returns: discordance matrix
Return type: PartialValueMatrix[QuantitativeScale]

abstract exploit(outranking_structure, **kwargs)

Exploit outranking structure.

Parameters: outranking_structure (T) –
Returns: result
Return type: Any