2. Achieving Higher Quality Levels
-- focusing on the Production System
Many times companies are tempted to
spend more for higher quality
it must flow from a good process
where quality is made a part of
everyone’s Job
We must understand that tighter
tolerances are a last resort that lead
to non-linear extra costs and quality
can be achieved through other means
We must analyze our products and
processes to determine what factors
actually lead to producing quality in
the processes and get control of them
3. Quality control
Quality control (QC) 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 or
meets the requirements of the client
or customer
4. Quality assurance
QA is defined as a procedure or set
of procedures intended to ensure
that a product or service under
development (before work is
complete, as opposed to afterwards)
meets specified requirements. QA is
sometimes expressed together with
QC as a single expression, quality
assurance and control (QA/QC).
5. 7 Tools of Quality Control
Check sheets used to gather information on
problem under investigation – where and how
much
Pareto Diagram – the so called 80-20 chart
used to identify the “vital few” that cause the
most problems – helps to focus the
improvement studies
Histogram – shows stratification in production
Scatter Diagram – used to identify relationships
between variables
6. 7 Tools of Quality Improvement
Flow Charts – describes, visually, the
process under study. Allows teams to
focus on problem areas and structural
issues
Cause-and-effect diagrams – also called
fishbone diagrams relates relationships
between various factors influencing the
problem under study.
Control Chart – charts of SPC to that
assess status of the problem under study.
10. Achieving Quality
Inspect EARLY and often –
make it part of each
operators Duties
An operator is both a
Customer of incoming
quality as well as a
supplier of down-stream
quality – they have a
vested interest in a better
quality level
Never rest until its perfect!
– which it can never be
since the targets keep
moving.
