Module 01 Flashcards
Creator of dimensions of quality
Garvin 1987
Will the product do the intended job?
Performance
How often does the product fail?
Reliability
How long does the product last?
Durability
How easy is it to repair the product?
Serviceability
What does the product look like?
Aesthetics
What does the product do?
Features
What is the reputation of the company or its product?
Perceived Quality
Is the product made exactly as the designer intended?
Conformance to Standards
How long they did it take the service provider to reply to your request for service?
Responsiveness
This is the knowledge and skills of the service provider, and relates to the competency of the organization to provide the required services
Professionalism
Customers generally want caring and personalized attention from their service providers. Customers want to feel that their needs and concerns are important and are being carefully addressed.
Attentiveness
Traditional definition of Quality
Quality means fitness for use.
Two general aspects of fitness for use
Quality of Design
Quality of Conformance
All goods and services are produced in various grades or levels of quality. These variations in grades or levels of quality are intentional, and, consequently, the appropriate technical term is___.
Quality of Design
- how well the product conforms to the specifications required by the design.
- is influenced by a number of factors, including the choice of manufacturing processes; the training and supervision of the workforce; the types of process controls, tests, and inspection activities that are employed; the extent to which these procedures are followed; and the motivation of the workforce to achieve quality
Quality of Conformance
Quality is inversely proportional to variability.
Modern Definition of Quality
is the reduction of variability in processes and products
Quality Improvement
Excessive variability in process performance often results in
Waste
a number of elements that jointly describe what the user or consumer thinks of as quality
Quality Characteristics
Critical-to-Quality (CTQ) characteristics
length, weight, voltage, viscosity
Physical
taste, appearance, color
Sensory
reliability, durability, serviceability
Time orientation
is the set of operational, managerial, and engineering activities that a company uses to ensure that the quality characteristics of a product are at the nominal or required levels and that the variability around these desired levels is minimum.
Quality engineering
usually continuous measurements, such as length, voltage, or viscosity
variables data
usually discrete data, often taking the form of counts, such as the number of loan applications that could not be properly processed because of missing required information
Attributes data
Quality characteristics are often evaluated relative to ___
Desired measurements for the quality of characteristics of the components and sub assemblies that make up the product, as well as the desired values for the quality characteristics in the final product.
specifications
A value of a measurement that corresponds to the desired value for that quality characteristic is called __
nominal or target value
those that fail to meet one or more of their specifications.
nonconforming products
A specific type of failure
nonconformity
nonconformities that are serious enough to significantly affect the safe or effective use of the product
defects
if it has one or more defects
defective
The reduction of variability in processes and products.
Excessive variability → waste
Also known as the reduction of waste (effective in service industries, where a quality problem may be an error or a mistake and the correction of which requires effort and expense)
Quality Improvement
largest allowable value
Upper Specification limit
lowest specification limit
Lower Specification Limit
Statistical Methods for Quality Control and Improvement
● Statistical Process Control (SPC)
● Design of Experiments (DOE)
● Acceptance Sampling
Methodology used to monitor and manage the quality of a manufacturing or production process.
Involves the use of statistical techniques, particularly control charts, to track and analyze the variation in process outputs over time.
Goal: ensure that process operates consistently within specified quality limits and to identify and address any sources of variability that may affect product quality.
Control charts: One of the primary techniques of SPC
Averages measurements of a quality characteristic in samples taken from the process versus time
Has a center line (CL) and control limits (UCL & LCL)
Statistical Process Control (SPC)
Approach to systematically varying the controllable input factors in the process and determining the effect these factors have on the output project parameters.
One major type is the factorial design: factors are varied together in such a way that all possible combinations of factor levels are tested.
Design of Experiments (DOE)