1. © Copyright 2006 POSC WITSML™ Public Seminar Use Case and Requirements Team Dr Julian Pickering, BP May 11, 2006

2. © Copyright 2006 POSC UCR Team Session Reviewed blocks to WITSML roll-out from service supplier and end user perspectives –UCR Team should provide clarity on business pull Developed new TOR for UCR Team –Revised workflow to include business factors in use cases –More responsive UCR Team Reviewed latest use case issues:- –Wellbore status/ = need to move data from x to y automatically DateLastChanged –Profiles = how do we make cost of entry to WITSML more reasonable? Conclusion: All technical issues should have a valid use case attached

3. © Copyright 2006 POSC UCR Team Terms of Reference Provide validated prioritised requirements to the technical team Primary Workflow is Steering Committee  UCR Team  Tech Team Use case is required for all technical issues with business demand defined UCR Team is the authority for use case approval UCR Team is accessible through a Yahoo group and will hold regular review meetings UCR Team will market WITSML to industry partners

4. © Copyright 2006 POSC WITSML Use Case Scope Change Review Hierarchy Change of scope to WITSML standard to be reviewed by Steering Committee Change of scope to technical requirement within current WITSML standard reviewed by UCR Team Changes to current implementations reviewed by Technical Team