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

Project, Use regression to perform trend analysis on the de-seasonalized de...

Use regression to perform trend analysis on the de-seasonalized demand values. Is trend analysis suitable for this data? Find MAD and MSE and explain the Excel Regression

Raw Materials Planning, what are some theories that would support on my re...

what are some theories that would support on my research study?

Explain the different types of shared risk contracts, Question 1 Explain t...

Question 1 Explain the various phases involved in negotiation Question 2 Discuss the various incentive mechanisms Question 3 Discuss each of the payment security r

Assignment 2, Suppose you are a corporate buyer. One of your suppliers deli...

Suppose you are a corporate buyer. One of your suppliers delivers a particular part in 12 days on average; with a standard deviation of 3/ The daily usage averages 20 units per day

Discuss in detail the reasons for bullwhip effect, Discuss in detail the re...

Discuss in detail the reasons for bullwhip effect? Demand forecasting Lead time  • Batch ordering  • Price fluctuation Inflated orders

Negotiations, buyer is the king since is the one who possesses the finance ...

buyer is the king since is the one who possesses the finance so there is no need for negotiations

Definition - inspection, Definition - Inspection, Test and Measurement in Q...

Definition - Inspection, Test and Measurement in Quality Inspection can be defined as the formal evaluation exercise which studies the  characteristics  of  the  product  to

Explain principles of supply chain networks, Supply chains are really suppl...

Supply chains are really supply networks that move the products, money, information and services. Explain 5 critical roles of supply networks that a manager must manage f

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