consumer(In a Web Parts connection, a server control that receives data from a provider control and processes or displays it. A consumer can be any type of server control, but must be designed to function as a consumer. A consumer must have a special callback method marked with a ConnectionConsumerAttribute attribute in the source code. This method receives data from the provider in the form of an interface instance)
consume(A posting which registers which items were used, how much time was spent and what costs were incurred for a service. This type of posting does not increase the amount for which the customer will be invoiced)