Seven quality tools OR Problem solving tools

Seven quality tools OR Problem solving tools

Seven quality tools OR Problem solving tools

1-Process flow chart
2-check sheet
3-Histogram
4-Pareto diagram
5-Cause and effect diagram
6-Scatter diagram
7-Control chart

THE 7 QUALITY TOOLS HELP TO:

  • Improve managerial decision making skills.
  • Collect, present and analyses the data.
  • Implement six sigma.
  • Control cost of poor quality.
  • Reduce variation and improve quality.
  • Reduce cycle time and improve efficiency.
  • Can be used in different continuous improvement methodology such as 6SIGMA, KAIZEN, 5S, 8D, SPC, quality circle.
  • 95% quality related problem at workplace could be solved with the help of seven QC TOOL.

1-Process flow chart

Ø  Showcase the whole picture of the process
Ø  Streamlines the process
Ø  Understand how input convert into output
Ø  Reduce waste
Ø Improve efficiency
Ø  Reduce cycle time
Ø  Reduce idle time
Ø  Find the trouble spots in the process
Ø  Identifies the VA and NVA activity
Ø   Train a new comer 
Process flow chart
Image Source-Google | Image by -QC/QA Methodology

2-check sheet

Ø  Confirms the physical presence of defects and defectives
Ø  Compiles the data defects and defectives
Ø  Used tally mark for counting defects and defectives
Ø  Can be used for future reference.

   Problem
Material
Total
X
Y
Shift
Shift
  1
  2
  3
  1
  2
  3
A
   26
   33
  16
   06
   24
   28
133
B
   10
   25
  24
   24
   33
   21
137
C
   22
  10
  20
   31
   17
   15
115
D
   32
  19
  10
   20
   22
   19
122
Total
   90
  87
   60
   71
   86
   83

237
240
507


3-Histogram

Ø  An SPC Technique
Ø  Describe process variation
Ø  Measure process capability
Ø  Evaluates spread of the data
Ø  Present large amount of data
Ø  Confirms symmetry in the data and in the absence of symmetry the histogram showcase the skewness present in the data
Histogram
Image Source-Google | Image by -QC/QA Methodology
4-Pareto diagram
Ø  Invented by an Italian economist Alfredo Pareto
Ø  Also called 80-20 rules
Ø  It is the combination of bar diagram and line graph
Ø  Actual frequencies are taken on primary vertical Axis, shown by vertical bar in descending order
Ø  Percentage cumulative frequencies are taken on secondary vertical Axis show by line graph in ascending order   
Pareto chart
Image Source-Google | Image by -QC/QA Methodology

5-Fishbone diagram

Ø  Name as its shape seems like the bone structure of a fish
Ø  Also called the cause and effective diagram
Ø  Also known as the Ishikawa diagram after the name of Prof. Kaoru Ishikawa, the Japanese quality guru.
Ø  The effect is written on extreme right on the middle arrowhead
Ø  Main cause of the effect on both side connecting by the arrow towards the main arrow and sub cause under each main cause connecting by small arrow.
Seven QC Tools
 Image Source-Google | Image by -QC/QA Methodology

6-Scatter diagram

Ø  Perfect +ve Correlation.
Ø   Perfect -ve Correlation.
Ø  High degree +ve Correlation.
Ø  High degree -ve Correlation.
Ø  Zero Correlation.
Scatter diagram

                                                            Image Source-Google | Image by -QC/QA Methodology

7-Control chart

Ø  The chart which maintain the accuracy of the data is main chart
Ø  Main chart is the presentation of the sample mean values between the control limit i.e. upper control limit and lower control limit.
Ø  The chart, which maintain the precision of the data range chart.
Ø   Range chart is the presentation of the sample range values between the control limits.
Control chart

  Image Source-Google | Image by -QC/QA Methodology



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