Oracle 11g Upgrade on windows2008r2

Hello ,

We have a server with Oracle 10.2.0.4 on win server 2003.

Now we are planning to upgrade Win 2008/2012 sever on Oracle to 11g , so for this we are Planning to to follow

1) Performing Export on Win 2003 server 10g

2) Importing on 2008 R2/ 2012  server with 11g Database.

Can any one tel me ,Is this SAP suggested method or Not, If not Please clarify me with reasons.....

CHEERS

HSK.A