Statistical process control - SPC Flashcards
Why quality management is important, what are the benefits from doing better
quality?
Quality management is important to a company since it gives its client a certain insurance of great products.
the benefits are found responding to the quality management questions
1) Have we done the job crrectly
- Detection of errors
- Reactive control
2) Can we do the job correctly
- Is the process within acceptable limits
- do we have the capability/ressources to do what is required
3) Are we doing the job correctly
- Is the project staying within acceptable limits
4) Could we do the job better
- Improve process capability and the loss function
5) Are we doing the correct job
- any unnecessary steps in the process?
Benefits also refrain us from having cost of poor quality (CoPQ)
How quality management links with scientific activity?
In a scientific method all of the
- Data collection
- methods
- Objectives
- How it corrects itself and is critical
all of those relates to quality management where they both of them have those attributes
What are the corner stones and approaches of TQM?
First of all, total quality management is: an approach to management that seeks to improve the quality of products and services in response to feedbacks
It’s corner stones are:
It’s approaches are:
1) Statistical process control
- Methods that focus on continuous improvement
- Quality circles
2) Statistical quality control
- SQC analysis tools for data analysis and visualization
- Professional teams supporting other departments of the company
3) Quality function deployment
- QFD is a method to transform user demands into design quality
- Methods that focus on customers, house of quality
- Used by the direction of the company
It’s cornerstones are:
1) Commitment to quality
2) Total impact
3) Continuous improvement
4) Scientific tools and techniques
How quality costs are classified? What is Deming’s wheel and who was Mr. Deming?
Quality costs are classified as so:
1) cost of inspection & tests
2) Cost of prevention
3) Costs of internal failures
4) Costs of external failures
Edward deming is a statistician and consultant. During WW2 he contributed to the amelioration of the production of weapons. He is often associated as a nobel prize of management
What is mr demings wheel: the wheel of demming follows four steps:
1) plan the changes for improvement
2) Implement the plan
3) Analyze results, did it work?
4) Institutionalize the change or redo the process
Plan, Do, Check, Act
Why quality awards are important, what do they provide to companies, what kind
of awards are there? How they link with ISO?
There are mutliple awards such as:
- Balridge award
- European quality award
- Deming prize
they provide legitimacy and credibility to compagnies as these award are given to company’s that deserves them to a certain level of quality
ISO: sets the base for improvement its a set of widely known and followed internationals standards that a company has to abide.
There are 3 steps to ISO:
1) A firm audits itself according to the standard
2) A customer audits its supplier
3) An agency or 3rd party that is qualified serves as an auditor
What are the Steps of SPC?
Eight dimensions of product quality
1) Performance
2) Features
3) Reliability
4) Conformance
5) Durability
6) Serviceability
7) Aesthetics
8) Perceived Quality
Seven dimensions of service quality
1) Time & timeliness
2) Completeness
3) Courtesy
4) Consistency
5) Accessibility & convenience
6) Accuracy
7) Responsiveness
What is cost of poor quality COPQ
is the portion of
operating costs brought about by providing a
product or service that does not conform to
performance standards, and the costs
associated with the prevention of poor quality.
Whare are the tools used in SPC
- Fish bone diagram (cause and effect)
- Check sheet
- Control chart
- Histogram
- Scatter diagram
Method of 5w2h
- What is being done
- why is the task necessary
- Where is it being done
- When is the best time to do it
- Who is doing it
- How is it being done
- How much does it cost now
What are the phases in SPC
1) Check sheets for quantitative follow-up to track real world
2) Top-ten and pareto diagram
3) Redo the analysis after the changes
4) Make a fishbone diagram
