Scheduling problems in Flexible Manufacturing Systems (FMS) appear as a specific field in the scheduling literature. Hybrid Flowshop Scheduling Problems (HFSP) also appear as another typical field of investigation. The FMS studied in this paper concern an Automated Guided Vehicle system (AGVs) organised in single loop. We propose to link these two classes of problems by underlining how to model this type of FMS scheduling problem as an HFSP. Our final goal is to identify the algorithm classes of one field that can be applied in the other context and vice versa.