A number of items of data from a data source (12) can be processed and supplied to a data destination (16, 17). The data can include image data, text data, numeric data or other types of data, or a combination of these types of data. The processing of the data is controlled by a project definition (14, 71, 101), which includes a plurality of modules selected from a variety of available modules (Tables 1-4). The modules have input and output ports which are interrelated by binding information. Where a project definition is complex and/or is assigned to process a large data set, capability is provided to launch multiple instances of the same project definition, each of which processes a respective portion of the data. Further, capability is provided to launch multiple instances of the same or different project definitions on each of one or more computers, in order to efficiently execute project definitions in a centralized processing facility.