Process to design a building

suppose I want to design a building and get its Reinforcement details:-

Firstly , I would model it in staad pro then it wud be analyzed. then I wud export the analysed file to a detailing software like staad RCDC and get reinforcement details.

Or

I should first analyse the model file in staad pro. then analyse it in staad concrete designer and see which members fail and then resize the members until all the members are shown safe in Concrete designer and then transfer the file to a detailing software (staad RCDC) and get Reinforcement details.

Is it neccessary to  analyse the model in Staad concrete designer bcoz the STAAD RCDC also tells which members fail ?

Note :  I KNow staad concrete designer also gives Reinforcement details but I want professional working detailing.