This document discusses continuous sampling plans (CSP) as an alternative to lot acceptance sampling plans (LASP) for quality control during manufacturing. CSP involves continuously inspecting units at a specified frequency (f) until a clearing number (i) of defect-free units is reached, at which point inspection drops to the specified frequency. If a defect is found, inspection returns to 100% until the clearing number is reached again. The key parameters of a CSP are the frequency, clearing number, and resulting average outgoing quality (AOQ) and average fraction inspected (AFI). An example illustrates how a custom cart builder could use CSP on dynamometer testing to ensure cart specifications are met and analyze quality levels.
Objectives
To understand Weibull distribution
To be able to use Weibull plot for failure time analysis and
diagnosis
To be able to use software to do data analysis
Organization
Distribution model
Parameter estimation
Regression analysis
The presentation is about basic statistical techniques and how statistics can be used effectively in the quality control and process control. It also presents statistical package Minitab version 16 and some of its applications in the field of statistical process control.
Objectives
To understand Weibull distribution
To be able to use Weibull plot for failure time analysis and
diagnosis
To be able to use software to do data analysis
Organization
Distribution model
Parameter estimation
Regression analysis
The presentation is about basic statistical techniques and how statistics can be used effectively in the quality control and process control. It also presents statistical package Minitab version 16 and some of its applications in the field of statistical process control.
Control Charts for variables Xbar and R chart and attributes P, nP, C, and u ...Dr.Raja R
Control Charts for variables Xbar and R chart
and attributes P, nP, C, and u charts, Variables Control Charts,X bar chart using R chart or X bar chart using s chart, X & MR (moving range) chart, Attributes Control Charts,
Approaches to Experimentation
What is Design of Experiments
Definition of DOE
Why DOE
History of DOE
Basic DOE Example
Factors, Levels, Responses
General Model of Process or System
Interaction, Randomization, Blocking, Replication
Experiment Design Process
Types of DOE
One factorial
Two factorial
Fractional factorial
Screening experiments
Calculation of Alias
DOE Selection Guide
Histograms are frequency charts. In Lean Six Sigma, they show the distribution of values produced by a process. In other words, a histogram is a visual display of how much variation exists in a process.
https://goleansixsigma.com/histogram/
A Pareto Chart is a quality chart of discrete data that helps identify the most significant types of defect occurrences.
https://goleansixsigma.com/pareto-chart/
Control Charts are time charts designed to display signals or warnings of special cause variation.
https://goleansixsigma.com/control-chart/
Control Charts for variables Xbar and R chart and attributes P, nP, C, and u ...Dr.Raja R
Control Charts for variables Xbar and R chart
and attributes P, nP, C, and u charts, Variables Control Charts,X bar chart using R chart or X bar chart using s chart, X & MR (moving range) chart, Attributes Control Charts,
Approaches to Experimentation
What is Design of Experiments
Definition of DOE
Why DOE
History of DOE
Basic DOE Example
Factors, Levels, Responses
General Model of Process or System
Interaction, Randomization, Blocking, Replication
Experiment Design Process
Types of DOE
One factorial
Two factorial
Fractional factorial
Screening experiments
Calculation of Alias
DOE Selection Guide
Histograms are frequency charts. In Lean Six Sigma, they show the distribution of values produced by a process. In other words, a histogram is a visual display of how much variation exists in a process.
https://goleansixsigma.com/histogram/
A Pareto Chart is a quality chart of discrete data that helps identify the most significant types of defect occurrences.
https://goleansixsigma.com/pareto-chart/
Control Charts are time charts designed to display signals or warnings of special cause variation.
https://goleansixsigma.com/control-chart/
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
2. Introduction
Lot acceptance sampling plans (LASP) are used during production to test units submitted
for evaluation against certain hypotheses. From a manufacturing perspective, LASP’s
provide a check on a company’s quality control processes. Most LASP samples of a
product are carried out in lots. In standard sampling a hypotheses of the sample makes
up the criteria by which the process is judged. These units are then accepted or rejected
on the basis of the set forth hypothesis. If a process has tested adequately, the lot or unit
is accepted and passed on to the retailer or customer. If, however; quality control is not
sufficient, sampling will prevent unacceptable product from leaving the manufacturer.
Accepting or rejecting a lot or unit is synonymous with not rejecting or rejecting the null
hypothesis in the hypothesis test. Because grouping into lots is not always advantages,
continuous sampling as outlined below, takes a slightly different approach to quality
control in manufacturing.
Continuous Sampling Defined
The concept of continuous sampling planning originated in 1943 by Dodge. Known as
CSP-1, continuous sampling is used where product flow is continuous and not easily
grouped in lots. Two parameters exist for continuous sampling. One is the frequency (f)
and the second is the clearing number (i). The frequency (f) is defined by a number such
as 1/20, 1/30, or 1/X. The clearing number (i) is a number such as 30 or 60. A company
checks all of its product until 100% of i number of units are inspected and found to be
defect free. After 100% of i number of units are found to be defect free 100% inspection
is ceased, and one out of every X number of units is checked. The sampling continues
until a defect is found. After finding a defect the cycle repeats itself until 100% of i
3. number of units has been found to be defect free. At this point the sample 1/X will begin
again.
Using Continuous Sampling
Carrying out a continuous sampling plan is simple and can be carried out in 3 steps. 1.
Inspect all i data. 2. If no defects are found, randomly sample fraction f of data and
check again for defects. 3. Whenever a defect is found, correct the flaw and repeat step
1. There are two main parameters to consider when executing a continuous sample. All
other relevant measurements for continuous sample planning can be derived from these
two parameters. The parameters with their variables defined can be seen in Figures 1 and
2.
Figure 1 CSP-1 Parameters
AOQ Average outgoing quality for long-run CSP − 1 plan.
AFI Average fraction inspected for long-run CSP − 1 plan.
Figure 2 AOQ and AFI Variables
f Sampling frequency for short-run CSP – 1 plan
i Clearance number for short-run CSP − 1 plan
p Incoming quality level
pa probability of accepting incoming unit
qi = 1-p
N Lot size
4. When a series defects are gathered, a good continuous sampling plan will inspect 100%
the rejected units and replace and defective parts or products. In this case all defects are
made whole and accepted. AOQ refers to the long term defect level of this sampling plan
and 100% inspection of rejected units. The average fraction inspected is simply the
average of the fractions 1/X sampled. Results can then be further analyzed by creating an
Average Outgoing Quality Curve (Figure 3). An Average Outgoing Quality Curve plots
the AOQ (Y-axis) against p, the incoming quality level (X-axis). Figure 3 tells us that
with high levels of incoming quality (low p values); the average outgoing quality was
also very good.
Figure 3 Average Outgoing Quality Curve
A plot of the AOQ versus p is given below.
NIST/SEMATECH e-Handbook of Statistical Methods, http://www.itl.nist.gov/div898/handbook/, date.
When incoming quality begins to drop defective items are inspected and replaced, thus
increasing the average outgoing quality. The curve in Figure 3 shows that after reaching
a certain level p, AOQ begins to drop. In other words diminishing AOQ takes place as
5. the value of p increases. The maximum AOQ point on the curve represents the worst
possible quality that results from the correction of defects.
Example
Cart Racing is a technical sport and requires precision in driving abilities as well as in
mechanics and cart workmanship. Professional cart racers will have multiple race carts
and expect their carts to meet specific specifications. One way to ensure a race cart
meets specifications is to run the cart on a DYNOmite Dynamometer. A Dynamometer
is always connected to a Data Acquisition Computer that reads such information as true
Hp, torque, RPM, elapsed time, etc. By designating a clearance number of say, 15, and a
frequency of 1/5, a custom cart builder could apply continuous sampling to
Dynamometer testing to ensure his carts meet certain criteria. After running multiple
samples the cart builder could figure out his AOQ level. Putting the data in graph like
that of figure three could show the cart builder his AOQ as compared to p, his or her
incoming quality. Using this data can provide further insight into where quality
originated and where quality improvement is still lacking.
How to get more information
Roderick Lashley. Applying Statistical Sampling Plans To Data Entry Procedures To
Increase Data Quality. STATKING Consulting Inc.
Chen and Chau. Joint Design of Economic Manufacturing Quantity, Sampling Plan and
Specification Limits. Economic Quality Control, Vol 17, No. 2, 145-153.
Chen and Chau. A Note on the Continuous Sampling Plan CSP-V. Economic Quality
Control, Vol 17, No. 2, 235-239.
NIST/SEMATECH e-Handbook of Statistical Methods,
http://www.itl.nist.gov/div898/handbook/, date.