“…Method or approach Studies Macro-economic level approach [25], [33], [34], [35], [36], [37], [38], [39] Function-based approach [29], [21], [40], [41], [42], [43], [44], [45], [46], [47], [48], [49], [50], [51] Component-based [52], [53], [54], [55], [56], [57], [58], [59], [60], [23], [61], [62], [63], [64], [65], [66], [67], [68], [69], [70], [38], [71], [2], [9], [72] Component-function-based approach.…”