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

Other Social Media Links:

YouTube - https://www.youtube.com/c/QualityExcellenceHub

Facebook - https://www.facebook.com/qualityexcellence.hub

LinkedIn - https://www.linkedin.com/in/parthasarthi-virda-88b6352a/

Pinterest - https://in.pinterest.com/qehub2018

Instagram - https://www.instagram.com/p_virda/?hl=en