While most projects consist of a single stream of components connected through links, you can also set up a single project that has multiple unconnected data streams. Since Sybase ETL is a parallel system, you cannot predict the order in which the streams are processed.
If you use multiple data streams, Sybase recommends that you design a project for each data stream so that all components within a project are connected to each other. This design guideline lets you control data streams by connecting the projects to form a job process flow.