9. There are 7 tools of quality control. They are as
follows:-
Flow Chart
Check Sheet
Pareto Chart
Fishbone Diagram
Scatter Diagram
Histograms
Stratification
10. Flowchart is a type of diagram that represents an
algorithm or process, showing the steps as boxes of
various kinds, and their order by connecting them with
arrows.
11. The check sheet is a form (document) used to
collect data in real time at the location where
the data is generated. The data it captures can
be quantitative or qualitative. When the
information is quantitative, the check sheet is
sometimes called a tally sheet.
12. A Pareto chart, named after Vilfredo Pareto, is a type of chart that
contains both bars and a line graph, where individual values are
represented in descending order by bars, and the cumulative total
is represented by the line.
13. ISHIKAWA diagram or cause and effect diagram is named after
its inventor of the tool Kaoru Ishikawa. The cause and effect
diagram aptly describes the tool to capture the causes of a
particular effect and the relationship between the cause and effect.
14. Scatter diagrams are used to study possible
relationships between the two variables and they do
indicate the existence of a relationship, as well as the
strength of that relationship
15. A histogram is a graphical representation of the distribution of
data. A histogram is a representation of tabulated frequencies,
shown as adjacent rectangles, erected over discrete intervals
(bins), with an area proportional to the frequency of the
observations in the interval
0
5
10
15
20
25
22.2 22.4 22.6 22.8 23 23.2 23.4 23.6 23.8 24 More
Frequency
22
Frequency
16. Stratification is the separation of data into
categories and is used to identify categories
contributing to the problem being solved and
the category worth consideration for further
investigation
17. Project Objective
To Reduce the Customer Complaints of blow
hole In Casting Flange .
Problem
In the existing process the rejection % of Blow
Hole due to porosity which is very high
because no proper ventilation of air at the time
of pouring molten metal.
22. W1-Blow holes are generated due to porosity
W2-No proper ventilation
W3-Pattern design not adequate
23. The blow holes in the flanges are coming due
to inadequate pattern design .
. A new design/pattern is introduced
according to the desired product needed.
24. It can be seen that the rejection is reduced from 30% to 5%
from 25 june to 10 july.
Cost per piece= Rs.40
Daily cost of lot= Rs400
Cost per month= Rs.12,000
Cost saved per year= Rs. 1,44,000
