Question 4 (a) Describe levelled scheduling' as an approach to planning and control, explain the benefits and any issues that may prevent its introduction. (8 marks) (b) Calculate the number of kanbans a company requires for the following situation and identify the inventory level. (5 marks) R = 750 units/hour T = 45 mins C = 225 units X = 12% (c) The company has decided the existing inventory level is too high and has proposes the following option for you to consider to reduce the inventory level. Option A: X becomes zero, or Option B: The delay time is reduced to 20 mins, or Option C: Capacity is increased to 325 Which option would you choose and why? Calculation for each option must b shown. (12 m 00 Total: 25 Marks