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Lesson #1: Quality Assurance Principles & Concepts

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Richard Shy

on 17 February 2014

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Transcript of Lesson #1: Quality Assurance Principles & Concepts

Quality Assurance
Principles and Concepts

What is QUALITY?
According to Merriam-Webster:
degree of excellence; grade
superiority in kind

According to ISO 9000:
the degree to which a set of inherent characteristics fulfills requirements.
"Fit for purpose"
The Cost of Quality
The "Cost of Quality" isn't the price of creating a quality product or service.

It's the cost of
creating a quality product or service.
Quality Management
Quality Planning
Quality Control
Quality Assurance
Quality Improvement
Definition of Quality
Software Quality Gaps
Cost of Quality
Quality Control vs. Quality Assurance
Quality Management
Validation & Verification
What is QUALITY for you?
What happens when a customer receives a low-quality product?

Is quality related to reputation?

Is quality important to you?
What's a quality product for you?

What differentiates it from other products in the market?

How do you measure quality?
Fulfilling the gap between
desired and actual output
loss of opportunity
loss of resources
labor costs
rework costs
material costs
Specified by customer


Delivered by producer
Delivered by producer


Expected by customer
Software Quality Gaps
Quality Control
A process to ensure whether a product meets predefined standards and requisite action is taken if the standards are not met.
Quality Assurance
A planned and systematic set of activities to ensure that variances in processes are clearly identified, assessed, and improved for fulfilling requirements.
Ensure that quality is built into work products rather than defects by:
identifying what "quality" means;
specifying and monitoring methods to ensure the presence of quality;
specifying ways to measure output to ensure conformance
Focus on
Quality Assurance
Quality Control
preventing defects through processes
being a
quality process
identifying defects in finished product
Improve development
test processes
to prevent defects
Identify defects

a product is developed, but before it is released
A systematic set of activities to ensure that processes create products with maximum quality at minimum cost of quality
Quality Improvement
A systematic and continuous activity to improve all processes and systems in the organization to achieve optimal level of performance.

The organized creation of beneficial changes in process performance levels.
Are you building the right thing?
Are you building it right?
The assurance that a product, service, or system meets the needs of the customer and other identified stakeholders. It often involves acceptance and suitability with external customers.
Does the software satisfy requirements?
The evaluation of whether or not a product, service, or system complies with regulations, requirements, specifications, or imposed conditions. It is often an internal process.
Does the software/process in building the software satisfy standards and standard processes?
QUALITY does not only focus on the
end product
, but also the
that affect time and effort in building the product.

It is a
continuous improvement
to ensure that the right things are being done the right way every time.
Full transcript