VF — Enable aggregation of customer satisfaction as value

Customer satisfaction is important business value. Hence it is essential that satisfaction of recipients (typically customers) in relation to a ValueProposition that they receive, is aggregated to business value, as part of a ValueProposition to the business (the provider of the ValueProposition). VDML does already support measurement of satisfaction (satisfactionLevel) of a recipient with a value (ValuePropositionComponent). It is also possible to define the relative weight (percentageWeight) of a value for the recipient. There is, however, no straightforward support, based on the meta-model, to e.g. aggregate the "overall satisfaction" (typically the weighted average satisfaction of the ValuePropositionComponents) to business value (value as embodied in a ValueProposition to the provider of the ValueProposition). Resolution of this issue will depend on resolution of issue VF-1.

Handle ValueProposition related (satisfaction) measurement via an additional ValuePropositionComponent

Resolution has the following elements: 1) Add optional (0..1) association between ValueProposition and ValuePropositionComponent (called “overallSatisfaction" on the ValuePropositionComponent end). 2) Add a constraint to it: The overallSatisfaction of a ValueProposition MUST be a ValuePropositionComponent of the ValueProposition. 3) And also this constraint: The overallSatisfaction of a ValueProposition MUST not itself have percentageWeight. 4) As the overallSatisfaction component makes value measurement at ValueProposition header level redundant, the following associations can be removed from ValueProposition: propositionValue, satisfactionLevel, valueImpactForProvider and valueImpactForRecipient.