7 QC Tools
7 QC Tools
| 7 QC Tools |
Why 7 Quality Tools required?
These tools are numerical data collecting and processing tools. They are required for:
ü Collecting data
ü Sorting
ü Prioritising
ü Root Cause identification
ü Measuring the results of action taken
ü Monitoring and comparing the action results
7 QC Tools for Quality improvement
ü Check sheet
ü Flow chart
ü Cause & Effect Diagram
ü Histogram
ü Pareto chart
ü Scatter Diagram
ü Control Charts
7 QC Tools – Check sheet
| Check sheet – 7 QC Tools |
- Use
Check sheet is used for collecting data on real time. Different form of Check sheets are used to collect data based on our area of focus.
- Benefits
ü Facilitates data collection in systematic, structured and organised way
ü Helps in leading towards probable source of problem
ü It facilitates data classification (Stratification)
ü It gives input to other quality tools
7 QC Tools – Flow chart
| Flow chart – 7 QC Tools |
- Use
For visual presentation of ideal processes and its sequence to be followed to complete a task
- Benefits
ü It gives overall understanding of processes
ü Sequence of operations to be followed
ü Highlights area of improvement by visualization
ü Helps in identifying Non-value adding activities
7 QC Tools – Histogram
| Histogram – 7 QC Tools |
- Use
For Graphical representation of the process for comparing it with process specification.
- Benefits
ü It gives visual distribution of process with respect to its process specification
ü Visually highlights process shift if any and area of focus
ü It shows process spread
ü Makes data easier to understand in graphical manner.
7 QC Tools – Pareto chart
| Pareto chart – 7 QC Tools |
- Use
For prioritising the problems. Pareto principle states that for many events, roughly 80% of the effects come from 20% of the causes. It is a simple bar chart that ranks related parameters in decreasing order of occurrence.
- Benefits
ü Prioritising Problems to focus on.
ü It identifies Vital Few from Trivial Many
ü It helps in analysing symptoms
ü Analysing results after solution implementation
7 QC Tools – Cause & Effect / Fish-bone / Ishikawa Diagram
| Fish bone Diagram – 7 QC Tools |
- Use
To graphically identify probable causes of problem with respect to “6Ms or 5Ps” through brainstorming.
- Benefits
ü It lists probable causes and hence gives vision to the team in future
ü It bifurcates the problem in different parts which enables micro level thinking process to find the root cause
ü It develops common understanding of CFT team on the factors which causes problem
7 QC Tools – Scatter Diagram
| Scatter Diagram – 7 QC Tools |
- Use
to graphically view correlation between two variables under test.
- Benefits
ü Helps to identify effect of change in one variable on other
ü Helps in establishing the relation of change in variables.
7 QC Tools – Control charts
| Control chart – 7 QC Tools |
- Use
Initially, to know present product outcome. Later, to predict expected product outcome and process shift over a time period
- Benefits
ü To know the process current status (within control, Out of control)
ü To predict out of control limits and out of specification Limits
ü To know your Process spread
ü To differentiate between common and special causes.
ü To compare processes
Other similar topics on Blog:
What is Quality
https://parthvirda.blogspot.com/what-is-quality
Quality Assurance vs Quality Control
https://parthvirda.blogspot.com/quality-assurance-vs-quality-control-i
Production Part Approval Process
https://parthvirda.blogspot.com/production-part-approval-process
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