An ad hoc supply chain collaborative computing environment management method includes selecting a collaboration model from amongst several models and establishing the environment in accordance with the selected model including defining a knowledge graph, a set of expected events to be received in an event log, and one or more predictive functions operating upon the different events in the event log to produce predictive values. The method also includes, registering actors in a supply chain as authenticated publishers or subscribers to the event log of different events published by different authenticated computing systems of the actors, authenticating different ones of the registered different actors prior the different actors publishing events to the event log, triggering predictive functions for newly published ones of the events in order to produce predictive values and providing read-only access to different states of the entities of the knowledge graph to authenticated subscribers.