Quality Management Chapter 9
CUSUM: Cumulative Sum Control Chart
EWMA :Exponentially Weighted Moving Average control chart
Shewart Charts :
-Provide information about last sample observation
-Ignores any information given by the entire sequence of point
Quality management : Chapter 5:/
SPC Statistical Process Control : its collection of tools thats when used together can result in
process stability and variability reduction.
- Variability is a major source of poor quality , SPC and Design of Experiments
Quality Management Chapter 2
DMAIC is a standard problem solving technique consists of
Its usually associated with six sigma but can be used with any business or process improvement effort.
DMAIC VS DFSS:
Quality Management Chapter 1
Eight Dimensions of Quality for PRODUCTS:
1) Performance 2) Reliability 3)Durability 4) Serviceability 5)Aesthetics
8) Conformance to standards
Eight Dimensions of quality for SERVICE :
Quality Management Chapter 6
Variable : Quality Characteristic of the process output thats measures on numerical scale weight
-When we deal with variability in a measured quality characteristic ,we monitor both sample mean
and sample variance.
Quality Management Chapter 15
Acceptance sampling is concerned with inspection and decision making regarding the products.
Three aspects of sampling are important :
1) Involves random sapling of an entire lot
2) Accept and Reject lots Lot Sentencing
Quality management : Chapter 4:/
Statistical inference : Its to draw and write conclusions about processes and populations based on
sample data from the system.
Random Sample: when a sample is selected so the observations are independent, it has the same
Quality Management Chapter 3
IQR= Q3-Q1 ( Measure of variability)
Sample Average : is a measure of central tendency , which represents the center of mass of the
Sample Variance: The larger the sample variance ,the greater is the variability
Quality Management Chapter 7
Control Charts for Fraction nonconforming : p chart (fraction nonconforming )
and np chart (number of nonconforming items)
Control Charts for nonconformities : C chart (defects) and U chart (defects per unit)
Output can be cl