Change management-Rollout of new AP functionality

[roadwarrior01]

My client is ready to roll out a new AP payment method, whereby vendors (including staff) could elect to have the payment deposited directly to their bank account. I've compiled a list of possible risk areas, and am mapping out a strategy and roadmap to publicize and sign up participants. Any broad-brush suggestions from OCM practitioners, or any others who have executed a similar push?