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

Problems, 1- The smallest defect in a computer chip will render the entire ...

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

Process flow diagram-operations and supply chain, The Pampered Puss is a co...

The Pampered Puss is a company with headquarters in Melbourne, Australia and operates 35 retail shops. These shops are spread throughout the metropolitan area and were established

Stepping stone method to obtain an optimal solution, A company has three fa...

A company has three factories A, B and C which supply units to warehouses X, Y and Z every month. The capacities of the factories are 60, 70 and 80 units at A, B and C

Describe the two trade-offs in transportation design, Question 1: Descr...

Question 1: Describe with an example, the final step for achieving strategic fit Explanation of strategic fit Question 2: Describe the two trade-offs in transportatio

Factors influencing demand in organic food market, What is the factors infl...

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

Purchasing and supply.., 5 steps in the process of evaluating the purchasin...

5 steps in the process of evaluating the purchasing and supply system

Solution to a case study, I am looking for a solution to a case study : Sub...

I am looking for a solution to a case study : Subcontract Review and Consent by the Government. Main character is Lieutenant Ralph Sliden.

Appeal mechanisms in the current procurement system, The Public Procurement...

The Public Procurement Act 2006 is based on international procurement best practices that guarantee the rights of all parties involved. For instance, unsatisfied bidders and supp

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