BusinessObjects 4.0 to 4.1 SP4 Patch3 Upgrade

Hi All,

currently, we are BOE 4.0 and now we have to upgrade it to 4.1 SP4 Patch3. below is the plan has been prepared. can you please let me know if this is how I can upgrade the system or there can be any other approach

Install Platform 4.1 SP2 on primary server

Install Platform 4.1 SP2 on additional servers (parallel on all app server)

Install Platform 4.1 SP4 on primary server

Install Platform 4.1 SP4 on additional servers (parallel on all app server)

Install Explorer 4.1 SP2 on primary server

Install Explorer 4.1 SP2 on additional servers (parallel on all app server)

Install Explorer 4.1 SP4 on primary server

Install Explorer 4.1 SP4 on additional servers (parallel on all app server)

Install Platform 4.1 SP4 Patch 3 on primary server

Install Platform 4.1 SP4 Patch 3 on additional server (parallel on all app server)

Install Explorer 4.1 SP4 Patch 3 on primary server

Install Explorer 4.1 SP4 Patch 3 on additional server (parallel on all app server).

Thanks

Ashish