How to convert character set of Oracle R12.1.1 running on 11.0.6 Oracle database from US7ASCII to UTF8/AL32UTF8

Documents I have followed ->

Globalization Guide for Oracle Applications Release 12 [ID 393861.1]

Migrating an Applications Installation to a New Character Set (Note 124721.1)

Oracle Apps DBA Interview Questions [both R12 and 11i]

Apps DBA Interview Questions [both R12 and 11i]

Q. What is adsplice utility ?

How to add a new entry in utl_directory or v$parameter

1. Close down database
2. Open /dbs

Creating custom TOP for error Inactive no manager

After cloning or upgrading if concurrent standard manager is not up with error "Inactive No manager".

Upgraded R12.1.1 cloning issue

while we run $ perl adcfgclone.pl appsTier on clone a R12.1.1 system post clone activity is stopping at 3%. It is taking long time there and then finally failed