Upgrade 11i (11.5.10.2) to R12 (12.1.3)

Question

Hi all,
I am starting to upgrade my EBS from 11.5.10.2 to 12.1.1 then to 12.1.3 on AIX 6.1 Operating System in Test instance. Any advise steps and recommendations.
I've check the Doc: Oracle EBS Upgrade Guide Release 11i to 12.1.1 and I am facing below issue :
1) Do we must to upgrade the DB to 11g as the Oracle desupport issue or want to reduce downtime?
2) Do I need apply 11i.AD.I.7 and 11.ATG_PF.H.Rup7 patches first?
3) And do I need to convert the application/DB to Multiple Organizations before upgrade? Any guideline?
4) There is no any customization, how much downtime can you experience?
The below is our system configurations :
Server : AIX 6.1 (Test instance / Prod. instance) - Single node
DB : 10.2.0.3.0 (non RAC)
APPS : 11.5.10.2 (non multi-org) :
- use Financial (GL, AP, AR, FA) only
- The lastest applied patchsets:
11i.ATG_PF.H CU2
11i.AD.I.4
11i.BNE.C
11i.FRM.F
11i.OAM.H
Forms 6.0 (Form Compiler) Version 6.0.8.27.0 (Production)
PL/SQL Version 8.0.6.3.0 (Production)
Oracle Procedure Builder V6.0.8.21.0 Build #0 - Production
Oracle Virtual Graphics System Version 6.0.5.39.0 (Production)
Oracle Multimedia Version 6.0.8.25.0 (Production)
Oracle Tools Integration Version 6.0.8.17.0 (Production)
Oracle Tools Common Area Version 6.0.5.32.0
Oracle CORE Version 4.0.6.0.0 - Production
Server version: Oracle HTTP Server Powered by Apache/1.3.19 (Unix)
Server built: Mar 25 2005 15:40:05 (iAS 1.0.2.2.2 rollup 5)
mult-org not enabled
select multi_org_flag from apps.fnd_product_groups;
--> N
I found below the list of docs, any advise steps and recommendations? And please suggest me which of the below document I need to follow?
Oracle Applications Release Notes, Release 12.1.1 [ID 798258.1]
Oracle E-Business Suite Upgrade Guide Release 11i to 12.1.1 [ID 1082375.1]
Database Preparation Guidelines for an E-Business Suite Release 12.1.1 Upgrade [ID 761570.1]
Interesting Documents Concerning E-Business Suite 11i to R12 Upgrades [ID 850008.1]
Upgrade Advisor: E-Business Suite (EBS) Upgrade from 11.5.10.2 to 12.1.3 [ID 269.1]
Upgrade Documentation -- http://docs.oracle.com/cd/E18727_01/index.htm
Oracle E-Business Suite Installation Guide Using Rapid Install -- http://docs.oracle.com/cd/E18727_01/index.htm
Oracle E-Business Suite Release 12.1.3 Now Available
https://blogs.oracle.com/stevenChan/entry/ebs_1213_available
Thanks
Sam

Answer 1

1) Do we must to upgrade the DB to 11g as the Oracle desupport issue or want to reduce downtime?It is recommended you upgrade to 11.2.0.3 before you start R12 upgrade -- Interoperability Notes Oracle EBS 11i with Oracle Database 11gR2 (11.2.0) [ID 881505.1]
2) Do I need apply 11i.AD.I.7 and 11.ATG_PF.H.Rup7 patches first?No.
3) And do I need to convert the application/DB to Multiple Organizations before upgrade? Any guideline?Yes.
https://forums.oracle.com/forums/search.jspa?threadID=&q=Multi-Org&objID=c3&dateRange=all&userID=&numResults=15&rankBy=10001
https://forums.oracle.com/forums/search.jspa?threadID=&q=Multi-Org+AND+Setup&objID=c3&dateRange=all&userID=&numResults=15&rankBy=1000
4) There is no any customization, how much downtime can you experience?You can determine the downtime unless you try it yourself on an instance with a hardware that is close to your production instance.
I have one more question, do I need to download and install the following files only from https://edelivery.oracle.com/EPD/Download/get_form?egroup_aru_number=11249864 ?
A) Oracle E-Business Suite Release 12.1.1 Rapid Install Start Here
B) Oracle E-Business Suite Release 12.1.1 for IBM AIX Based Systems (64-bit) Rapid Install RDBMS
C) Oracle E-Business Suite Release 12.1.1 for IBM AIX Based Systems (64-bit) Rapid Install Databases
D) Oracle E-Business Suite Release 12.1.1 for IBM AIX Based Systems (64-bit) Rapid Install Tools
E) Oracle E-Business Suite Release 12.1.1 for IBM AIX Based Systems (64-bit) Rapid Install APPL_TOPYou need to download the following under (Oracle E-Business Suite Release 12.1.1 Media Pack for IBM AIX Based Systems (64-bit)).
From: Oracle E-Business Suite Release 12.1.1 Rapid Install Start Here (Part 1 of 4)
To: Oracle E-Business Suite Release 12.1.1 for IBM AIX Based Systems (64-bit) Rapid Install APPL_TOP - Disk 3 (Part 2 of 2)
Thanks,
Hussein