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

Principles of supply chain mangement, Account Options> Sign in Settings Man...

Account Options> Sign in Settings Managing-Project-Supply-Chains-CH1.pdfYou are using a version of Internet Explorer which is unsupported. Some features may not work correctly. Ple

Lean operations, Kateville Textile Printing Company Ltd Introduction Katevi...

Kateville Textile Printing Company Ltd Introduction Kateville Textile Printing Company Ltd. design company which produces design fashion products and distribute to all branches of

Integrate external suppliers, Case study on DIMCO they have multi external ...

Case study on DIMCO they have multi external suppliers - 10 regional (6 in US and 4 out). each has 12 local distributors that supply 35 retailers. recommendations to integrate the

Net profit margin for firm, Categories Values Sales $ 51,400,000 Co...

Categories Values Sales $ 51,400,000 Cost of goods sold $ 25,700,000 Variable expenses $ 8,425,000 Fixed expenses $ 8,510,000 Inventory $ 6,255,000

#title.project risk and procurement management., How do i evaluate the use ...

How do i evaluate the use of a complex models for this title?

Project risk, A proactive strategic procurement operation can give the orga...

A proactive strategic procurement operation can give the organisation it represents a competitive advantage by reducing waste in the value chain. Purchasing strategies, however, ca

What is a full service agency?, Question 1 Discuss the Visualisation strat...

Question 1 Discuss the Visualisation strategy in advertising and the components of Visualisation strategy Question 2 Describe the elements of execution of advertising in brie

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