Date post: | 16-Apr-2017 |
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Engineering |
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Quality Control
What is Quality Control ? Why Quality Control Different Quality Software's Advantages of Quality Control software's Intro to Stat-graphics Pareto Analysis
Weighted Unweighted UnTabulated
Attribute Acceptance Plan Solving problems Using stat-graphics Conclusion
Content :
What is Quality Control ?Quality control is a procedure or set of procedures intended to ensure that a manufactured product or performed service adheres to a defined set of quality criteria
Why Quality Control ?
Our Generation
Why Quality Control matters to Egypt ?
Why Quality Control matters to Egypt ?
Extra gray hairs ?
Population Crisis :
Quality :
Software's :
Advantages of Uses Quality Control Software's:I. Maximizes $$ benefits of your QMS (Quality Management System) by maximizing
its effectivenessII. Automates many of the necessary actions for a well-run Quality Management
SystemIII. Enables collaboration among employees without having to leave their work-
stations (Cloud Based )IV. Saves time and costV. Creates a framework upon which a customized quality system can be built,
whether or not ISO is actually in placeVI. Vastly reduce the amount of man-hours needed to operate and maintain your
quality systemVII. Makes continual improvement of business processes a continuous and natural
habit.
Fish Bone Diagram
Example This fish bone diagram was drawn by a manufacturing team to try to
understand the source of periodic iron contamination.
Pareto Analysis :Introduction
Pareto Analysis is a statistical method to know vital few problems that cause significant effects
It is known that 80% effects are caused by 20% causes
STATGRAPHICS supports three basic types of Pareto analysis: Weighted Unweighted Untabulated
Pareto Analysis : Unweighted Normal Program
Interface
Columns could be adjusted
Column Name
Data Type
Pareto Analysis : Unweighted
Counted or tabulated data is entered which the analysis will be made of
Pareto Analysis : Unweighted
SPC Quality Assessment
Pareto Analysis
Pareto Analysis : Unweighted
Existing Columns
Measurable Data
Data Labels
If we need to combine classes
Pareto Analysis : Unweighted
Needed Tables and Graphs
Pareto Analysis : Unweighted
Data AnalysisFrequency Table
Pareto Chart
Cumlative Pareto Chart
Pareto Chart : Weighted
Weight Column is added
Weight is added
Pareto Chart : Weighted
Untabulated Data
Data whose frequency isn’t counted or calculated
Column is inserted in Observations place without labels
Untabulated Data
Xbar -Rcharts
Xbar-Scharts
Xbar-MR charts
P-chart The P-chart is a type of control chart used to monitor
the proportion ofnonconforming units in a sample, where the sample proportion nonconforming is defined as the ratio of the number of nonconforming units to the sample size
Types of P-chart: Constant Sample Size Variable sample Size
variable control limits Average Sample Size Standardized Control Chart
P Chart (Constant Sample Size)
!
P-Chart (Variable Sample Size)
NP-Chart : NP chart differs from P chart that is in the P chart
fraction of defectives are used but in NP chart count of defectives is used instead.
Control Charts for Nonconformities (defects) – Constant Sample Size
U-chart :
Attributes Acceptance Plan :Definition When lots containing a relatively large number of items require
inspection, acceptance sampling plans can provide reasonable protection against shipping or receiving an unacceptable fraction of non-conforming items without inspecting 100% of the lot.
The Acceptance Sampling (Attributes) procedure generates acceptance sampling plans for situations when items cannot be measured, only classified as conforming or non-conforming. In such plans, a sample of size n is drawn from a lot of N items and the lot is accepted if the number of non-conforming items in the lot is less than or equal to c.
SPC Acceptance Sampling Attributes OC/AOQL/LPTD
Plans
Attributes Acceptance Plan
Plan Type
Untabulated Data :
OC Curve
AOQ Curve
ATI Curve
Thank You
http://www.huffingtonpost.com/eastwest-center/chinas-population-policy_b_7860318.html
http://www.wikinvest.com/concept/China's_Aging_Population http://www.theguardian.com/world/datablog/2015/oct/29/impact-c
hina-one-child-policy-four-graphs https://en.wikipedia.org/wiki/One-child_policy https://populationpyramid.net/egypt/2016/ http://www.cnbc.com/id/49498720 http://blogs.wsj.com/chinarealtime/2016/01/22/chinas-working-age-
population-sees-biggest-ever-decline/
References :