Abstract: A computer-based system and method for managing multivariant transactions having non-linear components is provided. A database of users includes user profiles with information corresponding to the respective user. The system also includes or maintains a database of transactions between or among users, the transactions including proposed transactions and completed transactions. Software is provided enabling the pairing of at least one non-linear non-financial variable with at least one transaction between or among users, the non-linear non-financial variable received from one of the users involved in the transaction. Where the transactions are specific performance transactions, they can be weighted differently with respect to each other based on type or based on at least one of either the performer or the recipient of the specific performance transaction. Optionally, user profiles include a trustworthiness score generated based on an aggregation of the user's specific performance transactions with other users.