1.1 Describe the basic assumptions made when deigning simple flow lines. (8) 1.2 The diagram below shows the precedence relationships of work elements which constitute two models (A and B) of a simple product. The assembly line for the two models must be designed for a mixed production line Certain elements are common to both models. The outputs required for the two models per week are: Model A-80 units and Model B = 120 units: Model A: Elements A, B.D.E.F.H.I.J Model B: Elements B, C, D, G, H, I, J D E F G H I J Element ABC Element 0.4 0.3 0.6 0.4 0.2 0.3 0.4 0.3 0.3 0.5 Time (hour) 1.2.1 Complete the table below. Element Element time Output expected Total time Positional (hours) week weight Model A Model B (hours) A 0.4 80 D 80 C D 80 80 80 0 80 80 2 80 120 1.2.2 Use the Ranked Positional Weight Method, and design an assembly line with minimum number of workstations and allocate work elements to the workstations Cycle time is 120 hours per week (Show the cumulative station time and unassigned station time). (10) [28] E F G H T 8888888888 03 0.6 0.4 02 03 0.4 0.3 0.3 .22.8888 120 120 120 120 120 120 Total (requirements of A+B)