interventions_controller.rb

def some_action
  redirect_to wizard_path_for(@intervention)
end

def wizard_path_for(intervention)
  case intervention.wizard
    when 100
      intervention_expiries_path(intervention)
    when 80
      intervention_clients_path(intervention)
    when 70
      edit_intervention_path(intervention)
    when 60
      intervention_client_path(intervention, intervention.clients.contact)
    when 50
      intervention_followups_path(intervention)
    when 40
      intervention_referrals_path(intervention)
    when 30
      intervention_notes_path(intervention)
    when 10
      edit_intervention_path(intervention)
    else
      intervention_path(intervention)
    end
  end
end