Tasks for a business process can be decomposed into subtasks represented by messages. Message processing can be throttled in a heterogeneous environment. For example, message processing at subtask nodes can be individually throttled at the node level by controlling the number of instances of subtask processors for the subtask node. An infrastructure built with framework components can be used for a variety of business process tasks, separating business logic from the framework logic. Thus, intelligent scalability across platform types can be provided for large scale business processes with reduced development time and resources.