You can setup revision and version in PDM about anyway you want.
For an example this is how we do it:
A01-01 thru A99-99 for not controlled by documentation group.
P01-01 thru P99-99 for Prototype control.
R01-01 thru R99-99 for released.
From P01 to P02 takes an ECN and the version –01 to –02 does not take an ECN.
From R01 to R02 takes an ECN and the version –01 to –02 does not take an ECN.
Hope the helps.
The PDM will not let you R02 back to a R01.
Bradley