Why only state machine chosen to built RE-Framework

Hi ,

we all know that state machine process is gng to have fine no.of states during it’s process exaction.
But, why only the statemachine chosen to built re-framework.
Why no sequence or flow chart. Apart from that finite no.of states is there any other reason.
can’t we built re framework using sequence or flowchat?will it justify and give proper solution as statemachine.



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