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Question 4. (12 points) ABC Plastics specializes in manufacture of various engineering plastics. The company recently starts producing a high-grade plastic film to wrap food products. In the quality control phase, film rejected and scrapped for a variety of reasons. During the past month, management collected data on the types of rejects, the amount of scrap generated by each type, and corresponding workstations as the sources of individual types. The table below presents the results: Type of failure Air bubbles Bubble breaks Carbon content Unevenness Opacity Scratches Wrinkles Trim Amount of scrap (lb) Workstation 400 4 1,800 8 180 5 27,000 11 3,600 7 300 3 11,000 9 2 600 To start an improvement procedure, they want to use one of quality tools. Choose the best tool and show your analysis using the tool