PA 7-9 In their Portland, Oregon facility... In their Portland, Oregon facility,
ID: 383998 • Letter: P
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PA 7-9 In their Portland, Oregon facility... In their Portland, Oregon facility, Wavy Wood Works makes several types of wood bowls from coastal drift wood. To make a bowl the first step is to clean the drift wood. Each piece of drift wood makes a single bowl. There is one cleaning machine. It takes 38 seconds to load each piece of wood and the machine can hold up to 32 pieces. Once all of the pieces are loaded into the machine it takes 45 minutes to clean the set (no matter the number of pieces in the set). Once the wood is cleaned, 11 skilled artisans carve the bowls, each one takes on average 95 minutes to produce each bowl. After carving, bowls are finished with a stain. It takes 30 seconds to load each bowl into the stain machine. The staining machine holds up to 33 bowls. Once all of the bowls are loaded they are soaked for 79 minutes. After staining, bowls are unloaded onto drying racks. There is plenty of space on the drying racks What is the maximum capacity (bowls per hour) of this process? (Do not round intermediate calculations. Round to 2 decimal places.) bowls per hour Suppose Wavy wants to operate with the same number of bowls in each batch that is cleaned or stained. For example, if they clean in batches of 30, then they stain in batches of 30 as well. What batch size (in bowls) minimizes their inventory while allowing the process to produce at the maximum flow rate? (Use unrounded capacities from Part a. Round to 2 decimal places.) bowls per batch References eBook & Resources Worksheet Difficulty: 3 Hard Learning Objective: 07-06 Find the production quantities of each item such that the resource minimizes inventory while satisfying all demand PA 7-9 In their Portland, Oregon facility... Learning Objective: 07-02 Evaluate the capacity of a resource that has a setup time and is operated with a given batch sizeExplanation / Answer
Cleaning time per batch = 32*38/60 + 45 = 65.27 minutes
Cleaning time per bowl = 2.04 minutes per pc
Time to carve the bows = 95/11 = 8.64 minutes per bowl
Staining time per batch = 30*33/60 + 79 = 95.5 minutes
Staining time per batch = 95.5/33 = 2.89 minutes
Bottleneck operation is Carving. Therefore cycle time = 8.64 minutes per bowl.
Maximum capacity = 60/8.64 = 6.95 bowls per hour
b) The optimum batch size should be such that output of cleaning and staining is at least 11 pcs per 95 minutes
Both the operations have higher capacity than carving operations. therefore, optimum batch size to minimize WIP is 11 pcs.
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