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Task 4 Lean planning (25%) a) (10%) Heijunka: The total monthly demand for each type of product is: Product A = 1200 unit 1.1 Product B = 400 units Product C = 200 units Assume 20 working days a month. Calculate the production frequency for each type of product, and propose the Heijunka schedule that gives smoothest flow. b) (5%) Explain the advantages and disadvantages of Heijunka c) (10%) The average demand for component A is 300 pcs per hour. The replenishement leadtime is 20 minutes, and safety stock is 10%. The Kanban container size is 25. Calculate number of Kanbans