(a) The lowest planning level is scheduling, which the approach puts together day-to-day schedule for individual employees, customers, processes or products. Explain the following two performance indicators used in scheduling. i. Flow time ii. Tardiness (10 marks) (6) Planner for company GINIE is preparing production schedule for seven products. Each product must be processed by two workstations; machining and followed by polishing. The processing time (hour) for each product at each process is shown in Table Q3. A B D E F G Product Machining Polishing 2.71 5.52 2.89 2.58 3.47 1.66 5.84 3.38 7.62 5.22 1.73 2.41 1.99 1.11 i. Using Johnson's rule, prepares the production schedule for these products. Indicate when each product is ready for delivery. ii. Determine the utilization for each workstation. (20 marks) [30 marks]