ControlDraw allows hundreds of pages of diagrams to be kept in one file and related to each other through hierarchical models and spreadsheet table. 

With ControlDraw you can: Draw diagrams by dragging and dropping symbols and connecting them together; Build Models - hierarchically linked diagrams which you can drill down from a high level overview to the smallest level of detail; Draw procedural logic such as S88 Recipe procedures, Unit procedures, Operations and Phases; Design state oriented modules such as S88 equipment modules; Build matrix tables where the rows and columns in the tables are from objects in the diagrams, for example equipment state matrices; Draw a diagram once and then create multiple instances of the data associated with the diagram; Build libraries of reusable modules or objects; Record data for each of the objects on your diagrams and each instance in the model; Generate Complete documentation including specifications and test sheets as PDF files.