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MSE 618 Six Sigma Quality Engineering Homework 2 aluminum rods in the machine shop Answer

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MSE 618 Six Sigma Quality Engineering Homework 2 aluminum rods in the machine shop Answer

MSE 618 Six Sigma Quality Engineering Homework 2 aluminum rods in the machine shop Answer

MSE 618- Six Sigma Quality Engineering
Homework # 2 (10 points)
You work for a company that manufactures aluminum rods in the machine shop. The aluminum rods must be 601 mm +/-4 mm long to meet customer’s specifications. There has been a chronic problem with rods length being out of specifications causing high scrap and rework rates.
For a month, data was collected on the length of 30 aluminum rods in the machine shop. Also, three suppliers A, B and C that manufacture the same part, collected data on 30 aluminum rods at their own facilities (see data below).
Machine Shop Supplier A Supplier B Supplier C
599 602.1 601 603
600 604.0 600.1 601
609 603.7 605.9 601
603 606.4 602.8 600
600 605.7 604 605
601.3 605.3 604 604
601.2 603.2 602 603
600.5 606.9 600 602
601.6 605.5 602.2 602
603 603.7 603.1 599
598.1 604.6 600.2 606
603 603.3 604 600
602.1 606.9 599.9 601
604 605.9 600 603
577.6 603.1 603 600
607 607.7 601.4 605
602 603.3 602.5 604
603 605.3 603.7 604
601.5 604.1 603.9 602
604.6 603.8 602 600
601.1 602.5 600 599
602.5 606.9 607 600
603.1 607.8 609 601
600 605.9 608 602
604.1 604.5 606.3 603
591.7 603.1 605.7 603
589.1 606.1 601.1 607
605.3 602.6 606 601
600.9 604.1 602 603
598.0 603.4 605 604
Question:
Should the company continue producing aluminum rods or buy parts from outside suppliers? You have been asked to lead a problem-solving team and recommend a solution. Hint:
You must run the following analysis, study results and make a recommendation:
• Run a normality test for the machine shop and each supplier A, B and C data set

• Perform a Process Capability Analysis for the machine shop, supplier A, B, and C

• Approximate Sigma level for the machine shop, supplier A, B and C (Use Cpks)

• Calculate Cp to determine how much the machine shop and each supplier (A, B and C) sample is consuming out of the spec.

• Scrap cost for the machine shop and each supplier A, B and C (Use Taguchi analysis)

• Run ¯¯ and R chart for the machine shop, supplier A, B, and C

 

MSE 618 Six Sigma Quality Engineering Homework 2 aluminum rods in the machine shop Answer

 

 

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