Optional Features allow BOVS diagrams to be progressively enhanced. If you choose to use an Optional Feature, you must follow all of its related rules.
We recommend that you always incorporate Annotation and Colour features unless it’s cumbersome to do so, e.g. when hand-sketching.
Specify the nature or strength of interest for each Arrow in the diagram.
Use colour to make ownership and control information easier to understand at a glance.
Draw stronger interests with heavier Arrows.
Summarise ownership or control information with a bar chart incorporated into the diagram.
Give additional information about the Parties in your diagram, with icons.