Some of the users managed the idea that there could be different plan for offense and for defense, no we one and the same for both, but plenty of teams in reality stands in one positions in offense and changes in defense 
example:
Offense:
starters                               subs
player  PG  A                     player  PG B
player  SG  A                     player  SG B 
player  SF  A                     player  SF B
player  PF  A                     player  PF B
player   C  A                      player   C B
Defense:
starters                               subs
player  SG  A                     player  PG B
player  PG  A                     player  SG B 
player  PF  A                     player   C B
player  SF  A                     player   PF B
player   C  A                      player  SF B
that means that they can change players they defend on the court.
In my opinion it to hart to make develop for BBs. But community are talking about this so I represent them in global forum.
                                
                                
                                
                                
                                
                                
                                    ZyZla - ZyZlūnas ZyZlavotas ~c(=