This is the pictorial version of the diagram on the right.
These are the Business Rules that the Conceptual Data Model must comply with.
R.1 The Events in a Supply Chain are defined by in a number of Event Sequences.
R.2 People and Organisations can be involved in an Event.
R.3 Documents can be generated in an Event.
R.4 Payments can be made as part of an Event.
R.5 Supplies can be used in an Event.