additiveValueFunctionsIdentification

Provider:RXMCDA
Version:1.1

Description

Identifies an set of piecewise linear additive value functions according to a ranking of the alternatives. If the number of segments is not given, a general additive value function is looked for.

Inputs

(For outputs, see below)

criteria

Description:

A list of criteria. Criteria can be activated or desactivated via the <active> tag (true or false). By default (no <active> tag), criteria are considered as active.

alternatives

Description:

A list of alternatives. Alternatives can be activated or desactivated via the <active> tag (true or false). By default (no <active> tag), alternatives are considered as active.

XMCDA related:

  • Tag: alternatives

  • Code:

    <alternatives>
        <alternative id="..." [...]>
                <active>[...]</active>
        </alternative>
        [...]
</alternatives>

performanceTable

Description:

A performance table. The evaluations should be numeric values, i.e. <real>, <integer> or <rational>.

XMCDA related:

  • Tag: performanceTable

alternativesRanks

Description:

The ranking of the alternatives, the best alternative having the lowest rank.

XMCDA related:

  • Tag: alternativesValues

separationThreshold

Description:

Threshold value indicating the minimal difference in terms of the overall value between two neighbor alternatives in the given ranking.

GUI information:

  • Parameter values can be defined via the GUI or the XMCDA file, by default via GUI.

  • Name: separationThreshold

    Threshold value indicating the minimal difference in terms of the overall value between two neighbor alternatives in the given ranking.

    • Constraint description: The value should be a strictly positive float, less than the highest possible overall value.
    • Type: float

XMCDA related:

  • Tag: methodParameters

  • Code:

    <programParameters>
        <parameter name="separationThreshold"> <!-- attribute 'name' REQUIRED  -->
                <values>
                        <value>
                                <real>%1</real>
                        </value>
                </values>
        </parameter>
</programParameters>

segments

Description:

The number of segments for the additive value functions. If it is not given, then a general additive value function is searched for.

GUI information:

  • Parameter values can be defined via the GUI or the XMCDA file, by default via GUI.

  • Name: numberOfSegments

    The number of segments for the additive value functions.

    • Constraint description: The value should be a strictly positive integer.
    • Type: integer
    • Default value: 1

XMCDA related:

  • Tag: methodParameters

  • Code:

            <parameter name="criteriaSegments"> <!-- attribute 'name' REQUIRED  -->
                <values>
                        <value>
                                <integer>%1</integer>
                </values>
        </parameter>
</programParameters>

Outputs

valueFunctions

Description:

The value functions of the selected criteria.

XMCDA related:

  • Tag: criteria

  • Code:

    <criteriaFunctions>
        <criterionFunction>
                <criterionID>g1</criterionID>
                <functions>
                        <function>
                                <discrete>
                                        <point>
                                                <abscissa><real>[...]</real></abscissa>
                                                <ordinate><real>[...]</real></ordinate>
                                        </point>
                                        [...]
                                </discrete>
                        </function>
                </functions>
        </criterionFunction>
</criteriaFunctions>

messages

Description:

A list of messages generated by the algorithm.

XMCDA related:

  • Tag: programExecutionResult

For further technical details on the web service underlying this program, have a look at its documentation here.