| Task: Design Trust Measurement Infrastructure |
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| Design the elements of the system that allow the derivation of experiences. |
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Purpose
Provide the infrastructure required to derive trust values.
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Relationships
| Inputs | Mandatory:
| Optional:
| External:
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| Outputs |
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Main Description
In order to measure the trust value, contracts have to be established and the results of interactions have to be
compared to these contracts. For this purpose, the desired and the actual result of interactions need to be determined
and transformed into an experience. Depending on the interaction, the contract can either be stated explicitly or even
negotiated in a separate interaction or be defined implicitly.
In any case, experiences have to be stored in the system and made available to the trust model. The trust model will
have to be able to access the experiences and create a trust value from them. The value will then have to be available
to the agent or a reputation manager.
Existing patterns for this infrastructure should be employed whenever possible.
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Steps
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Specify the contents of contracts
| This step has to be performed for each interaction with different contracts. The designer has to make sure that all
relevant aspects of the interaction are captured in the contract. Depending on the actual interaction, this includes
prices, delivery deadlines, maximum response times, etc. |
Define the data stored in experiences
Experiences can store pre-processed data, such as deviations from the contract, or raw data, e.g., the contract and the
actual result of the experience. Depending on the trust model used, only relevant information must be stored. However,
discarding information can also mean that the system is not flexible w.r.t. later changes in the trust model. The
designer has to make a conscious and well documented decision which data is kept and which pre-processing steps have to
take place.
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Design interfaces to the trust model and the agents
| In order to make the data available to the trust model and to the agents, appropriate interfaces have to be defined. If a
reputation system is used, make sure that it can also access the trust values or it automatically
receives new trust values (pull or push). |
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Properties
| Multiple Occurrences |  |
| Event Driven | |
| Ongoing | |
| Optional | |
| Planned | |
| Repeatable | |
More Information
| Supporting Materials |
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| Whitepapers |
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