The reviewing user comments on the relationship to note something that seems relevant to her.
The reviewing user approves the relationship because she agrees with it.
Alternative scenario:
The reviewing user only comments on the relationship but doesn't approve it and might suggest a different relationship (e.g. neutral).
No changes are made to the relationships confidence score.
One administrator decides on the outcome.
Error scenario:
Postcondition:
The number of approvals are counted for the administrator to decide on the confidence score.
Relationships with higher confidence score will have a higher weight when suggesting plants or suggesting alternatives.
On changes of the confidence score, the reviewed user gets notified about the updated score.