Calculate lead time
Williams Optical Inc. is considering a new lean product cell. The present manufacturing approach produces a product in four separate steps. The production batch sizes are 45 units. The process time for each step is as follows:
Process Step 1 | 5 minutes |
Process Step 2 | 8 minutes |
Process Step 3 | 4 minutes |
Process Step 4 | 3 minutes |
The time required to move each batch between steps is 5 minutes. In addition, the time to move raw materials to Process Step 1 is also 5 minutes, and the lime to move completed units from Process Step 4 to finished goods inventory is 5 minutes.
The new lean layout will allow the company to reduce the batch sizes from 45 units to 3 units. The time required to move each batch between steps and the inventory locations will be reduced to 2 minutes. The processing time in each step will stay the same.
Determine the value-added, non-value-added, and total lead times, and the value-added ratio under the (A) present and (B) proposed production approaches. (Round percentages to one decimal place.)
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Chapter 26 Solutions
Financial & Managerial Accounting 14th Ed. W/ PAC LMS Intg CNOWv2 2S
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Under the lean philosophy, the part is produced in a cell that includes both the milling and finishing operations. The operating time is unchanged; however, the batch size is reduced to 5 parts and the move time is eliminated. Determine the value-added, non-value-added, and total lead times, and the value-added ratio under the traditional and lean manufacturing methods. Round percentages to one decimal place.arrow_forwardUse the following information for Exercises 5-44 through 5-46: The following six situations at Diviney Manufacturing Inc. are independent. a. A manual insertion process takes 30 minutes and 8 pounds of material to produce a product. Automating the insertion process requires 15 minutes of machine time and 7.5 pounds of material. The cost per labor hour is 12, the cost per machine hour is 8, and the cost per pound of materials is 10. b. With its original design, a gear requires 8 hours of setup time. By redesigning the gear so that the number of different grooves needed is reduced by 50%, the setup time is reduced by 75%. The cost per setup hour is 50. c. A product currently requires 6 moves. By redesigning the manufacturing layout, the number of moves can be reduced from 6 to 0. The cost per move is 20. d. Inspection time for a plant is 16,000 hours per year. The cost of inspection consists of salaries of 8 inspectors, totaling 320,000. Inspection also uses supplies costing 5 per inspection hour. The company eliminated most defective components by eliminating low-quality suppliers. The number of production errors was reduced dramatically by installing a system of statistical process control. Further quality improvements were realized by redesigning the products, making them easier to manufacture. The net effect was to achieve a close to zero-defect state and eliminate the need for any inspection activity. e. Each unit of a product requires 6 components. 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Required: CONCEPTUAL CONNECTION For each situation, identify the possible root cause(s) of the activity cost (such as plant layout, process design, and product design).arrow_forward
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