BW 3.5 Upgrade approx 20Days to do?

Question

I would like some input into estimates of effort to upgrade our 3.1 to 3.5.
I have been following some threads and it seems that the upgrade,if you follow the SAP instructions and are well prepared, seems straight forward.
I have reviewed the 'How to.....SAP BW 3.5..." document.
It seems quite explicit in its steps and information.
Are there any other major steps  that I am missing. If its approx 20 days to do then that is what it is, I am just a bit perplexed. We want to move on with the upgrade and its the scheduling of the upgrade window is my concern if it is the above amount of time. We may well have to put-off for 6 months.
We only have one application running in SEM - BPS.
These estimates are provided by one of our partner
                     BW Consultant          Basis Person
Preparation                2                     3
Blueprint                                        3
Review SEM/BPS objects     2
& processes
Install Upgrade Software                         1
for 3.5                                          1
Install latest Patch       1                     1
levels for BW (SP-Stacks)
& OSS Notes
Install Plugin                                   1
Review Technical Mods &
action changes             3                     2
<b>Total                      8                    10</b>
Message was edited by: Frank Kennedy

Answer 1

Frank,
The document would give you an idea as to what all needs to be done. But you also need to look ata
1. Volume of data / number of cubes / ODS to be migrated into 3.5
2. You will also have to do the same to your DEV , QAS and PRD systems in order to continue from this point onwards with BW 3.5
3. You should also look at testing the entire setup post upgradation. Please ask your application consultant if they have budgeted for this and have made a correct estimate of the volumes and different systems.
I am not saying that 20 days is too short but I think testing has been left out and validation.
You would have to find out all reports / Graphs etc etc and then look at migration and then also look at any new expectations - since there might be enhancements with the feeling that - ' Anyway we are upgrading - let us get these reports also done in the process' This thought will increase the scope and increase the timelines.
Arun