Problems, Supply Chain Management

Assignment Help:
1- The smallest defect in a computer chip will render the entire chip worthless. Therefore, tight quality control measures must be established to monitor these chips. In the past, the percentage of defective for these chips has been 3%. The sample size is 100. Calculate the upper and lower control limits of a P-chart to monitor this process. Also determine whether the process is in control if a sample of 100 chips indicated 7 defectives.


2- Cool Technologies produces refrigeration units for food producers and retail food establishments. The overall average temperature that these units maintain is 49 ºF. The average range is 4 ºF. Samples of size 7 are taken to monitor the process. Calculate the control limits for X-bar and R charts. Also determine if the process is in control if the next sample taken results in 47, 48, 50, 52, 51, 57, and 56.


3- An electronic component has design specification limits of 215?25 mhz. Due to variation in the parts that goes into this component, the actual yield varies. A sample of 100 indicated a mean of 220 mhz and standard deviation of 7 mhz.

a- Find the Process Capability Index (Cpk) for this process. Is this process capable? Why?






b- Find the process capability if we adjust the process mean to 217 and reduce variability by 15%. Is this modified process capable? Why?












4- A random sample of 200 cars observed after paint jobs performed by robots indicated a total of 785 blemishes. Find the upper and lower control limits for a C-chart with alpha risk of 6% to monitor the number of blemishes per car. If a car has 10 blemishes, should any action be taken?



















5- - Sampling seven (n=7) pieces of precision-cut parts every hour for the past 14 hours has produced the following results.

Sample 1 2 3 4 5 6 7 8 9 10 11 12 13 14
X-bar 3.05 3.02 3.04 3.01 3.07 2.99 2.98 3.05 3.07 3.12 3.11 3.12 3.14 3.15
R 0.31 0.28 0.26 0.37 0.48 0.32 .23 0.37 0.32 0.56 0.71 0.79 0.88 0.92

a- Find the 3-sigma control limits for X-bar and R charts.










b- Draw the X-bar and R-charts and comment on the state of the process.


Related Discussions:- Problems

Prompt, 4. About 5% of delivered products are spoiled upon delivery with ei...

4. About 5% of delivered products are spoiled upon delivery with either the fish or plants dying, or both, due to sensitivity to changes in temperatures, which is a major financial

Linear programming, Hello i need some help with a homework for next Monday ...

Hello i need some help with a homework for next Monday regarding linear programming.

Material handling, what are the factors that affect materials handling

what are the factors that affect materials handling

Inspection accuracy, I nspection Accuracy: Project management status r...

I nspection Accuracy: Project management status report is provided in a particular way. As an a example, consider the criteria for doctor to monitor health , he or she checks

Describe the principles of quality management systems, Question 1: Desc...

Question 1: Describe the several principles of Quality Management Systems. Describe Quality Management System Principles of Quality Management Systems Conclusion

Determine factors influencing demand in organic food market, What is the fa...

What is the factors influencing demand in organic food market? Organic Food Market Organic farming is influenced by several factors. In this section, we analyse the factors tha

Definition of an identification problem, Identification problems 1.  W...

Identification problems 1.  What is the definition of an identification problem (in the context we have discussed in EC337)?   2.  Two general empirical patterns are that (1)

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd