How to upgrade DM and VVC when placed on a dedicated server in a distributed environment?

I want to upgrade DM and VVC from 5.0.2 to 6.0 when placed on a dedicated server in a distributed environment.

The instructions in
http://www-01.ibm.com/support/knowledgecenter/SSB2MU_8.1.3/com.ibm.rcam.install.doc/topics/t_upgrade_dm_distributed.html
say for Windows:

First upgrade the JTS on the other server.
Then change to the < JTS_<latest_version>_install_dir >\server directory.

execute:

upgrade\dm\dm_upgrade.bat
-oldApplicationHome \opt\IBM\JazzTeamServer\server\conf -ignoreJTSVersionCheck
-updateTomcatFiles no

upgrade\vvc\vvc_upgrade.bat
-oldApplicationHome VVC_<previous_version>_install_dir\server\conf

We use repotools-APP.bat -migration_APP_updateConfigurationFiles to upgrade the CLM apps.
Is that the correct set of commands? And if yes, can we really omit the parameter

-ignoreJTSVersionCheck

for the vvc command?