1. Oasis Overview

2. 2 OASIS Overview What is OASIS? S –Open Access Same Time Information System –Electronic site for transmitting utility information to customers Allows Customers to submit Transmission Service Reservations (TSR)

3. 3 OASIS Overview Midwest Market Reservation Types –Point to Point (Imports, Exports, Throughs, Withins) Moves energy from specific point to another Transmission service reservation required for both Midwest ISO and non Midwest ISO transmission Requested through OASIS system –Network (Imports and Withins) Moves energy from Generator (Generator can be outside of or inside of footprint) to native load within Midwest Market footprint Contact Tariff Admin to set up initial reservation Spot Market transactions, imports only, no incremental charge.

4. 4 1-NS2-NH 3-ND 4-NW5-NM6-NN 6-NN = Non-firm Network 5-NM = Non-firm Monthly 4-NW = Non-firm Weekly 3-ND = Non-firm Daily 2-NH = Non-firm Hourly 1-NS = Non-firm Secondary Beginning with 1-NS Non-firm Secondary 7-F 7-F = Firm OASIS Overview Priorities of Transmission Service

5. 5 Task 1: Submit OASIS TSR Step 1: Navigate http://oasis.midwestiso.org/oasis/miso https://marketoasis.midwestiso.org/oasis/Midwest ISO

6. 6 Task 1: Submit OASIS TSR Step 1: Navigate

7. 7 Task 1: Submit OASIS TSR Step 2: Submit FTR Information only displayed if FIRM Service Type FIRM service can be DAILY, WEEKLY, MONTHLY or YEARLY ‘Asset Owner’ field This is passed to the PSS (through OASIS) and used in settlements Participants will only be able to select Asset Owners that they are responsible for based on the company login

8. 8 Task 1: Submit OASIS TSR Step 2: Submit POR/POD and Source/Sink will have to match E-Tag exactly or the E-Tag will be denied SUBMIT buttons are located at the top and bottom of the reservation page

9. 9 Task 1: Submit OASIS TSR Step 3: Evaluation Evaluation of Reservation Request –Tariff Administration evaluates Transmission Service Requests using the following criteria: Verify adequate capacity on the fifteen most limiting constrained facilities on the flow path in the OASIS request If negative AFC exists on one of the fifteen most constrained flowgates then the request could receive a counter-offer or be denied –Status is assigned to Transmission Reservation

10. 10 Task 1: Submit OASIS TSR Step 3: Evaluation States of a Service Request –Queued- Indicates initial status on receipt of a customer purchase request or TSR –Study - Indicates some level of study is required to evaluate a request –Accepted (by Midwest ISO) - Indicates the service request has been approved /accepted –Confirmed (by PSE) - Indicates the request has been confirmed and a transmission service request exists –Withdrawn - Indicates the customer has withdrawn the request from further action during the evaluation process –Counter-Offer - Indicates partial acceptance of a request due to limited AFC, FTR availability –Refused – indicates the Midwest ISO has refused the request Note : Only the most common states are listed here. Refer to the Open Access Tariff Business Practices for the complete list.

11. 11 Task 1: Submit OASIS TSR Step 4: Initial Result Transmission Service Request number Status of QUEUED

12. 12 Task 1: Submit OASIS TSR Step 4: Result = Accepted Withdraw or Confirm reservation Status of ACCEPTED

13. 13 Tariff Administration Department Two Desks in Control Room Real-Time Desk (7x24 Staffing) Processes all requests for non-firm transmission service, primarily requests for hourly transmission service. Day-Ahead Desk (Normal Business Hours) Processes requests for short-term firm service - Daily, Weekly, Monthly.

14. 14 Scenario Analyzer –Allows a customer to submit a request for analysis of transmission capacity without actually submitting a transmission request Flow-based approach determines AFC on constrained facilities –Results of Request OK – capacity potentially available Not OK -- feedback given as to hours/days request is not OK. Include limiting facility and amount of AFC available on facility

15. 15 Other Info on Tariff Administration –Tariff Administration Contacts Non-Firm Service Desk – 317-249-5523 Firm Service Desk – 317-249-5524 E-Mail - tariffadministration@midwestiso.org –OASIS URLs: http://oasis.midwestiso.org/OASIS/MISO –(Non-Secure) https://oasis.midwestiso.org/OASIS/MISO –(Secure – Requires Certificate)