A simple business case
A simple example of building UC into the business process is the dreaded Conference Call. Most project based business processes will include one (or many) review stages - which these days typically means a conference call. Setting up a call is usually a nightmare - check diaries, send out an invite, get some 'accepts' some 'declines', reschedule, start all over again - you know how it goes.
The UC approach is different: the CRM knows that the process has reached review stage by a fixed set of criteria. The CRM knows which individuals (or roles) need to be on the call (again this is 'rules-based'). The UC Server has 'presence' visibility of all personnel and can control the conference bridge. When a quorum of people are available, UC initiates the conference and pulls in the necessary people.
And by the way, the UC Server can also conference a voice recording channel into the bridge, and tag the recording of the review back into the CRM so the whole thing has verification built in.
Setting up one conference call can waste a good hour of someone's time. How many conference calls does your business run per annum?
Business case - sorted...