Upgrade BI 8.2 to 8.3

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Is it a straight forward upgrade from 8.2 to 8.3?

Is their a specific order it should be done in?

i.e. Framework Manager, Report Studio, Query Studio etc.

Need to give a presentation on company BI strategy and need to know work involved in upgrade before looking at who should do the work.

Thanks in advance for any pointers. :)