The Windchill ESI transaction management user interface is described in the Transaction Management section. This user interface is developed using PTC’s MVC based Client Architecture, which requests for data and services by invoking Info*Engine tasks (that make use of Windchill Adapter webjects) and certain Java APIs. The transaction management UI invokes an appropriate method on the StandardESIService class (see the Windchill ESI Windchill Service section of this document for details). The StandardESIService delegates all work to an instance of ESITransactionUtility (see the ESITransactionUtility section of this document for details).