Oracle E-Business Suite Upgrade Guide Release 11i to 12.1
PDF Version: Link
HTML Version:Link
New Whitepaper: Planning Your E-Business Suite Upgrade from Release 11i to 12.1 (Second Edition)
https://blogs.oracle.com/stevenChan/entry/ebs_121_upgrade_whitepaper
Planning Your Oracle E-Business Suite Upgrade from Release 11i to 12.1 and Beyon
http://www.oracle.com/technetwork/apps-tech/upgrade-planning-2011-1403212.pdf
Upgrading to Oracle E-Business Suite Release 12: Best Practices
https://blogs.oracle.com/stevenChan/resource/images/eweinstein.pdf
Five Key Resources for Upgrading to E-Business Suite Release 12
https://blogs.oracle.com/stevenChan/entry/five_key_resources_for_upgrading_to_ebusiness_suit
11i to R12(12.1.3) Real Experiences of a DBA
http://www.solutionbeacon.com/RealUpgradeExperiences11itoR12.pdf
Four Critical Changes for Customizations in Release 12
https://blogs.oracle.com/stevenChan/entry/four_critical_changes_for_cust
Oracle eBusiness Suite Applications Release 12 Upgrade from Deloitte
http://nooaug.oaug.org/meetings/DeloitteR12UpgradePresentationforNOOAUGAugust2012.pdf
MOS Notes
Planning Your E-Business Suite Upgrade from 11i to Release 12.1 (Note 987516.1)
Upgrade Advisor: E-Business Suite (EBS) Technology Stack Upgrade from 11.5.10.2 to 12.1.2 [ID 253.1]
Upgrade Advisor: E-Business Suite (EBS) Upgrade from 11.5.10.2 to 12.1.3 [ID 269.1]
Planning Your Oracle E-Business Suite (EBS) Upgrade from Release 11i to Release 12 [ID 1406960.1]
Preparing Custom Development for Next Oracle E-Business Suite Release [ID 374398.1]
R12: Upgrade vs. Reimplementation (Financials) [ID 780989.1]
Database Preparation Guidelines for an E-Business Suite Release 12.1 Upgrade [ID 761570.1]
Oracle E-Business Suite Upgrade Center - Home [ID 461705.1]
Oracle E-Business Suite Release 12.1.1 Maintenance Pack Installation Instructions [ID 752619.1]