(Chapter 7 Process Interruptions ) Aquatica makes underwater camera housings for divers. The process begins with a solid rectangular block of aluminum that is used to make a single housing. A Computer Numerically Controlled (CNC) machine drills into the block to make the metal "frame" of the housing. The CNC machine requires a 45-minute setup time before the production of a batch can begin. Each block requires 15 minutes of drilling on the CNC machine. The frame is then chemically treated in a series of baths. There is unlimited capacity in the treating stage. Finally, a worker must manually attach the various buttons and components to the metal housing. This assembly takes 120 minutes per housing per worker and Aquatica has 6 workers trained to do this task. Assume unlimited demand. The process is shown below. Also, assume there is a buffer inventory between the stages of the process. Drilling on CNC machine ===> Chemical Treatment====> Assembly What is the utilization of the CNC machine if the batch size is 38 housings? 90% O 50% O 75% O 100% (Chapter 7 Process Interruptions) Aquatica makes underwater camera housings for divers. The process begins with a solid rectangular block of aluminum that is used to make a single housing. A Computer Numerically Controlled (CNC) machine drills into the block to make the metal "frame" of the housing. The CNC machine requires a 45-minute setup time before the production of a batch can begin. Each block requires 15 minutes of drilling on the CNC machine. The frame is then chemically treated in a series of baths. There is unlimited capacity in the treating stage. Finally, a worker must manually attach the various buttons and components to the metal housing. This assembly takes 120 minutes per housing per worker and Aquatica has 6 workers trained to do this task. Assume unlimited demand. The process is shown below. Also, assume there is a buffer inventory between the stages of the process. Drilling on CNC machine ===> Chemical Treatment====> Assembly Suppose the process is supply constrained and operates with batches of 38 housings, what is the average inventory of housings? O 3.7 units O 8 units O 6.2 units 4.8 units (Chapter 7 Process Interruptions ) Aquatica makes underwater camera housings for divers. The process begins with a solid rectangular block of aluminum that is used to make a single housing. A Computer Numerically Controlled (CNC) machine drills into the block to make the metal "frame" of the housing. The CNC machine requires a 45-minute setup time before the production of a batch can begin. Each block requires 15 minutes of drilling on the CNC machine. The frame is then chemically treated in a series of baths. There is unlimited capacity in the treating stage. Finally, a worker must manually attach the various buttons and components to the metal housing. This assembly takes 120 minutes per housing per worker and Aquatica has 6 workers trained to do this task. Assume unlimited demand. The process is shown below. Also, there is a buffer inventory between the stages of the process. Drilling on CNC machine ===> Chemical Treatment====> Assembly What batch size would yield a CNC drilling capacity equal to the assembly capacity? (Hint: find first the assembly capacity) O 15 housings 4 housings 20 housings 9 housings