Preview

Statistical Process Control

Better Essays
Open Document
Open Document
13394 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Statistical Process Control
Process Capability Assessment
Control Charts for Individual Measurements
Cumulative-Sum control charts
Control Charts for Large Sample

.
.

Statistical Process Control - Part II
IE 330, Spring 2013,
Instructor: Yu-Ching Lee

March 14, 2013

1 / 127

Process Capability Assessment
Control Charts for Individual Measurements
Cumulative-Sum control charts
Control Charts for Large Sample

Use of the histogram
Process Capability Indices
Statistical Assignment of Tolerances
Loss Function Approach

. Process Capability
Recall that we compared the two different ideas—Product conformance v.s. Control of the process—in our previous lecture slides.
Product conformance issue is also referred to as the process capability. One should never place the engineering specifications on a control chart, since such would wrongly suggest that tracking a quality characteristic is related to the engineering specifications. Although the two issues are completely different, they are linked in the sense that it is impossible to assess process capability without being reasonably assured of having good statistical control.
2 / 127

Process Capability Assessment
Control Charts for Individual Measurements
Cumulative-Sum control charts
Control Charts for Large Sample

Use of the histogram
Process Capability Indices
Statistical Assignment of Tolerances
Loss Function Approach

. Process Capability

If a process is in statistical control but not capable of meeting the specifications, the problem may be one of the following: .
1 The process is off-center from the nominal.
. The process variability is too large relative to the tolerance/specification. .
3 Both of the above.
2

3 / 127

Process Capability Assessment
Control Charts for Individual Measurements
Cumulative-Sum control charts
Control Charts for Large Sample

Use of the histogram
Process Capability Indices
Statistical Assignment of Tolerances
Loss Function Approach

.


References: N. L. Johnson and F. C. Leone generalized the cusum charts to Poisson and binomial random variables as well as for testing for shifts in variance and range. N. L. Johnson and F. C. Leone, Cumulative Sum Control Charts: Mathematical Principles Applied to Their Construction and Use, Parts I, II and III, Industrial Quality Control, Vol. 18, No. 12, Vol. 19, No. 1, and Vol. 19, No.2, 1962. 127 / 127
Continue Reading
View Writing Issues

You May Also Find These Documents Helpful

  • Good Essays

    Xacc/280 Week 9 Final Paper
    • 1701 Words
    • 7 Pages

    Xacc/280 Week 9 Final Paper

    The main task of statistical process improvement methods such as Statistical Process Control, Six Sigma and Measurement Systems Analysis and the Taguchi approach to Experimental Design is to control and reduce process variation.…

    • 1701 Words
    • 7 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Daniel Pogrebinsky And Sebastian Kolde Process Research Paper
    • 363 Words
    • 2 Pages

    Daniel Pogrebinsky And Sebastian Kolde Process Research Paper

    We were drawn to the French Revolution because of an interest in King Arthur and the Round Table, particularly the story of Sir Gawain and the Green Knight. The myth described how a lone knight dressed in green, challenged King Arthur’s Court to a game of decapitation. During that time, people were usually executed by hanging; however, nobility could choose to have a much quicker execution, by decapitation. After conducting research on decapitation, we learned that the method of execution evolved into a machine, the guillotine. The guillotine fascinated us, and because it was one of the most iconic symbols of the French Revolution, the civil war had our attention.…

    • 363 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    Process Design Matrix OPS/571
    • 857 Words
    • 4 Pages

    Process Design Matrix OPS/571

    Deliver pizzas to customer within 45 minutes. No sit down areas, carry out or delivery only.…

    • 857 Words
    • 4 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Sequential and Selection Process Control Structure
    • 669 Words
    • 3 Pages

    Sequential and Selection Process Control Structure

    In the following example, the second line of the table specifies that tax due on a salary of $2000.00 is $225.00 plus 16% of excess salary over $1500.00 (that is, 16% of $500.00). Therefore, the total tax is $225.00 + $80.00, or $305.00.…

    • 669 Words
    • 3 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    Process Analysis Paper
    • 481 Words
    • 2 Pages

    Process Analysis Paper

    My family has always been a family full of cooks and bakers. My mom especially has always been the one who bakes sweet treats like no other human has before! As her favorite daughter I have picked up and been taught the way my genius Mom bakes. Now, I’ve decided to share my family’s treasure. I’ve decided to share the instructions on how to make these Cookie Bars.…

    • 481 Words
    • 2 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Operational Management: Statistical Quality Control and Performance Improvement
    • 13814 Words
    • 56 Pages

    Operational Management: Statistical Quality Control and Performance Improvement

    External failure costs arise when a defect is discovered after the customer has received the product or service.…

    • 13814 Words
    • 56 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    Process Analysis Paper
    • 711 Words
    • 3 Pages

    Process Analysis Paper

    So, you want to know how best to prepare for that chemistry test? Well, have I got some great tips for you. First, it is important to realize that what is being taught in the classroom is only a minute part of what the actual knowledge transfer is supposed to be. The teachers think that by teaching the students everything that is in the curriculum is enough and that they have done their jobs by teaching the students from books. This is hardly the case, as the real challenge for the students is to use that knowledge in a meaningful way to really understand what the subject is all about. The studying from books part is the least important bit.…

    • 711 Words
    • 3 Pages
    Good Essays
    Read More
  • Good Essays

    statistic manager
    • 2768 Words
    • 12 Pages

    statistic manager

    6.14 Show that for a sample of n = 39, the smallest and largest Z values are – 1.96 and + 1.96, and the middle (i.e., 20th) Z value is 0.00.…

    • 2768 Words
    • 12 Pages
    Good Essays
    Read More
  • Good Essays

    Objective Control Model
    • 1022 Words
    • 5 Pages

    Objective Control Model

    Successful victory and survivability is based on the ability to adapt to different warfare forms and strategies. However, another critical variable/principle is the needs of a strong Civil-Military Relationship. For the military to be able to quickly adjust to the ever changing political goals/objectives, and to have the ability to adapt and change to different forms and strategies, their needs to be a healthy political and military relationship. First and foremost, the government and the military needs to trust each other. Huntington and Janowitz both wrote a great deal on civil-military theories. Agreeing on the purity of the Objective Control model, we are starting on a strong foundation for a flourishing civil-military relationship. Clausewitz…

    • 1022 Words
    • 5 Pages
    Good Essays
    Read More
  • Good Essays

    Controlling Systems
    • 773 Words
    • 4 Pages

    Controlling Systems

    Kaiser Permanente has opted to use the bureaucratic control system to help meet the challenges of such complex environment. Bureaucratic control system is design to measure progress toward planned performance and to ensure that they are in line with management's objectives (2004). Today, bureaucratic ideas are still widely used among organizations to ensure success. Kaiser Permanente has found this system to be reliable, accurate and secure; all these terms have assisted our large complex organization to control its vast amount of employees.…

    • 773 Words
    • 4 Pages
    Good Essays
    Read More
  • Good Essays

    Technical Controls
    • 875 Words
    • 4 Pages

    Technical Controls

    Physical controls monitor and protect the physical environment of the workplace and computing facilities. They also monitor and control access to and from such facilities. Separating the network and workplace into functional areas are also physical controls. An important physical control…

    • 875 Words
    • 4 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Example Of Controlled Process Analysis
    • 102 Words
    • 1 Page

    Example Of Controlled Process Analysis

    Controlled processes require attention and effort. They are intentionally done with conscious awareness (Goldfarb et al., 2011; Raz et al., 2006). For example, initially learning to ride a bike, drive a car or read a book. Automatic processing does not require attention or effort. Automatic processing occurs without much thought (Raz et al., 2006). Often, controlled processes can become automatic with practice (Raz et al., 2006). For example, reading a book may require a child’s full attention and effort when initially learning how to read. However, over time and repetition, reading can become an automatic process that does not require much thought.…

    • 102 Words
    • 1 Page
    Satisfactory Essays
    Read More
  • Good Essays

    Dual Process Model
    • 1041 Words
    • 5 Pages

    Dual Process Model

    Being defined as “the psychological, behavioral, social and physical reactions to loss of someone or something that is closely tied to a person’s identity”(Casarett, Kutner, & Abrahm, 2001), grief is a “negative emotional response” (Dean A. Shepherd, 2003) that can affect one for days to even years. In the past, it was believed that most people recover from grief through the Kübler-Ross model, namely disbelief, yearning, anger, depression and acceptance. However as time progressed, the dual process model proposed that grieving people could participate in other activities that they are interested in to divert their attention, while withdrawing from their loss. Even though one is able to resume work while recovering from grief, it is often at work where the recovery process is not being supported and hence results in detachment. Aside from personal loss, loss of jobs also contributes to people suffering from grief. Since work makes up a large part of people’s lives, it is important that work acts as an avenue for one to heal. The creation of meaning via current jobs or new jobs will aid in restoring the lives of people. The healing process from grief can be further improved if there were to be support from the organization and superiors.…

    • 1041 Words
    • 5 Pages
    Good Essays
    Read More
  • Powerful Essays

    Polaroid Case
    • 1849 Words
    • 8 Pages

    Polaroid Case

    * Introduces the construction and use of statistical process control (SPC) charts and an understanding of the relationship between SPC and conformance quality.…

    • 1849 Words
    • 8 Pages
    Powerful Essays
    Read More
  • Good Essays

    production control
    • 785 Words
    • 13 Pages

    production control

    1) The manager of an automobile repair shop hopes to achieve a better allocation of inventory control efforts by adopting an A-B-C approach to inventory control. a) Given monthly usages in the following table, classify the items in A, B and C categories according to dollar usage: Item Usage Unit Cost 4021 90 $1,400 9402 300 12 4066 30 700 6500 150 20 9280 10 1,020 4050 80 140 6850 2,000 10 3010 400 20 4400 5,000 5 a) In descending order: Item Usage x Cost 4021 $126,000 Category A 4400 4066 6850 25,000 21,000 20,000 B B B 4050 9280 3010 9402 6500 11,200 10,200 8,000 3,600 3,000 228,000 C C C C C b) Determine percentage of items in each category and percentage of total cost for each category. Category Percent of Items Percent of Total…

    • 785 Words
    • 13 Pages
    Good Essays
    Read More

Related Topics