1. March 29, 2005Arizona Public Service Company Presentation to NERC/NAESB Conference on the Future of OASIS The future view of transmission reservations, e-tagging and scheduling

2. March 29, 2005Arizona Public Service Company Current OASIS, Scheduling and E-tagging OASIS systems do not share E-tagging system allows the creation of bad e-tags Some systems can communicate adjacent IA schedules to each other Hence check-out may still be verbal

3. March 29, 2005Arizona Public Service Company Current OASIS, Scheduling and E-tagging Some TP have hourly product but may only be one type (firm or non-firm) Some TP’s have like products to that contiguous transmission available

4. March 29, 2005Arizona Public Service Company Example of an existing OASIS that assists the energy markets Common UI and security certificates Some wesTTrans TP’s have like products to that make contiguous transmission possible OASIS like wesTTrans make multiple non-contiguous reservations possible

5. March 29, 2005Arizona Public Service Company Future OASIS, Electronic Scheduling and E-Tagging OASIS is made and linked to others Linked OASIS ready for E-tag creation E-Tag generated from OASIS data  POR/POD consistency  Source/Sink consistency  Correct ordering of SE’s  Electronic validation and checkout