Abadi I-Tech Shop has two technicians, Technician A and Technician B to service hand phones. The technicians work 10 hours a day. Each technician is able to service 2 hand phones in 24 minutes. The cost of service is RM8 per hour. At the shop, the customers are lined up and are served by one of the two technicians as they become available. The customers arrive at a rate of 15 minutes. Assume that each customer will bring with them one hand phone only to be service, and the arrival rate of customers follows a Poisson distribution. Given the total cost involved is RM240. a) b) Determine the average time a customer spends in the system. (10 marks) Calculate the waiting cost of a customer. (6 marks) Suggest a way to reduce the waiting cost. State a reason for your answer. (2 marks) Calculate the utilisation factor if Technician B is on medical leave. (2 marks) c) d) Abadi I-Tech Shop has two technicians, Technician A and Technician B to service hand phones. The technicians work 10 hours a day. Each technician is able to service 2 hand phones in 24 minutes. The cost of service is RM8 per hour. At the shop, the customers are lined up and are served by one of the two technicians as they become available. The customers arrive at a rate of 15 minutes. Assume that each customer will bring with them one hand phone only to be service, and the arrival rate of customers follows a Poisson distribution. Given the total cost involved is RM240. a) b) Determine the average time a customer spends in the system. (10 marks) Calculate the waiting cost of a customer. (6 marks) Suggest a way to reduce the waiting cost. State a reason for your answer. (2 marks) Calculate the utilisation factor if Technician B is on medical leave. (2 marks) c) d)