Introduction The Guidelines Availability & Performance Key Indicators Availability Performance Publication of Statistics Reporting PSU Interfaces Reporting Template TPP Reporting Dedicated Interfaces Design & Testing Testing Facility Publishing Specifications Stress Testing Wide Usage Obstacles Problem Resolution Procedures, Processes & Systems OBIE Support Change Management Downtime New OBIE Standard Introducing Change Considerations Changes to ASPSP’s Infrastructure Notification of Change OG Checklist Checklist TPP Guidelines Change Management Data Ethics Data Privacy Testing The Approach Participant Journey Test Phase Engagement Issues and disputes ASPSP Issues: Downtime Issue Resolution Service Requests Dispute Management System Contract and Supplier Management Business Continuity and Disaster Recovery Change Log