A lot depends on how well the project activities have been planned. From BW applications perspective testing will be important while performing a technical upgrade. This should not be taken as a hard timeline but after you have done good planning (assuming a midsize deployment) I believe, 2 weeks per environment should be a reasonable time for upgrade and testing. This would result in about 6-8 weeks for an end-to-end (Dev-QA-Prod) technical upgrade although coordination and completion of testing activities could push it out.
↧