Is there a limit to the number of Key Business Processes depicted on the 1-page Process Model?

Yes.

About 18 is the limit for readability at a reasonable font size for a 1-page diagram. Having more than 16-18 probably means that some of the processes depicted are sub-processes of the organisation’s Key Business Processes and therefore should not be shown. Most organisations have somewhere between 5 and 14 Key Business Processes.

Prior to facilitating the initial 2-day Strategic Planning Workshop at the start of the Client’s Year 1, we recommend that you prepare a preliminary draft of the organisation’s 1-page Process Model for rapid ratification/amendment during the Workshop.