Productions and Operations Midterm Essay

Please answer all questions in this exam. Answers to the multiple choice questions need to be filled in on the scantron sheets (remember to use pencil to fill in the circles) and also circled on the exam itself. Answers to the short answer questions should go in the exam booklet provided. All three components (scantron sheets, exam booklets, paper copy of exam) should be turned in at the conclusion of the exam.

3) Compute limits for the sample mean X around μ=12 such that, as long as a new sample mean is within those limits, the process will be considered to be operating satifactorily. If X exceeds the upper limit or if X is below the lower limit, corrective action will be taken. These limits are refferred to as upper and lower control limits fro quality control purposes.

Directions: Use your graded tests and Unit 4 & 5 notes to answer the following questions. You can find the answers for #’s 1 – 62 on Exam 1 (3rd Nine Weeks Exam) and #’s 63 – 100 on your unit notes. Write your answers in the space provided, below each question.

- Complete all of the details required on the front page of the examination booklet. - Make sure that you note the SIX(6) questions attempted on the front of your examination booklet - If Seven questions are attempted, the first SIX(6) will be marked. - You may use a non-programmable calculator - Graph paper will be provided. - Answers are to be written in ink. Pencils are permitted for graphing purposes. - The

A process that monitors standards by take measurements and corrective action as needed. It is in control when only variation is natural, if variation is assignable then discover cause eliminate it. Take samples to inspect/ measure- reduce inspection time, reduce opportunity of bad quality. Control charts graph of process data over time-show natural and assignable causes. Control charts for variable data (characteristic that is measured, length,height, etc) are X-chart (average) and R-chart (range)must use x and r to get correct results. central limit theorem follow normal curve. When we know . When we don’t know . Control charts for attributes (categorical-defective, good/bad) P-chart (percent) or C-chart

Review the sample syllabus and sample rubric under the questions below. Then, provide answers underneath the following questions:

“In the end, we will be better off by honoring excellence. We want the best leaders, teachers, policemen, physicians, generals, lawyers, and airplane pilots that we can possibly produce in society. So our program should be to promote equal opportunity… and reward people according to their individual merit.”

I am honored to be selected by the teachers as well as the staff of Ellenville Central High School for the consideration of becoming a member of the National Honor Society. The National Honor Society accepts the most qualified students who are recognized for their academic excellence and achievements throughout their high school career, showing academic discipline; these students are focused on being the most prestigious members of their society. Often these students possess the qualities and talents of a young leader. As a result of wanting to be beneficial for society, they help improve the community around them in the best way possible. The National Honor Society could work more with the accommodation of food and donation drives, a soup

As an organization, the National Honors Society is a prestigious group in which those of significant quality concerning character and high academic standard are accepted. In this, I believe that its members are often high contributors to society and often help others to the best of their ability. Although they are not always highly outspoken, members of NHS are frequently leaders in their community, in their schools, and elsewhere. As a result of these common traits found in its members, NHS must maintain a justified strict acceptance margin. Thus, my integrity of character, natural inclination for leadership, and understanding of the importance of activity in the community are all qualities which I posses that make me a viable candidate for membership in the National Honors Society.

Quality Associates, Inc. is a consulting firm that advises its clients about sampling and statistical procedures that can be used to control manufacturing processes. In one case, a client provided Quality Associates with a sample of 800 observations that were taken during a time when the client's process was operating satisfactorily. The sample standard deviation for these data was .21, hence, the population standard deviation was assumed to be .21. Quality Associates then suggested that random samples of size 30 be taken periodically to monitor the process on an ongoing basis. By analyzing the new samples, the client could quickly learn whether the process was operating satisfactorily. When the process was not operating

Quality Associates, Inc., a consulting firm advises its clients about sampling and statistical procedures that can be used to control their manufacturing processes. In one particular application a client gave Quality Associates a sample of 800 observations taken during a time in which the client’s process was operating satisfactorily. The sample standard deviation of this data was 0.21; hence with so much data, the population standard deviation was assumed to be 0.21. Quality Associates then suggested that random samples of size 30 be taken periodically to monitor the process on an ongoing basis. By analyzing the new samples, the client could quickly learn whether the process was operating satisfactorily. When the process was not operating satisfactorily, corrective action could be taken to eliminate the problem. The design specification indicated the mean for the process should be 12. The hypothesis test suggested by Quality Associates follows.

5.  Assuming that operators will continue to take samples of 10 sheets each hour to check if the process is in control, what control limits should Douglas set for the case when extrusion is a Six Sigma process?

From the calculation (See Appendix I), we get the 3-sigma control limits for the process, i.e. UCL=0.091, LCL=0.014. These control limits indicate that if the error proportion is within the range of [0.014, 0.091], the process is under control; if not, the process is out of control.

* Creating the strategy and implementation steps for transforming an operation from inspection-based to one that relies on statistically controlled process.

The premise of this paper is to identify deficiencies in daily managerial processes by using systematic statistical process controls and make the necessary improvements. The paper will employ various examples and calculations along with supporting data to explain control limits and its importance to the statistical process control. The effects of seasonal factors and its relevance to a process will also be highlighted and how confidence intervals are important in giving insights into data sets that improve the entire statistical process control.