2. What is the
purpose
of a flow chart?
• It is a picture of a process
• It is drawn with symbols
representing different types
of activities
• It defines the system
being studied.
• It documents changes to
the process.
3. Why are flow
charts useful?
• They provide a visual for
students to see steps in a process.
• They can be used as an
assessment to check for
student understanding.
• They can help organize classrooms
and minimize transition times.
4. Flow Diagram
Definition
A flow diagram is a graphical means of presenting,
describing, or analyzing a process & movement of
material, men etc.
This is done with the help of all five symbols which
represent steps in a chain of steps.
These all symbols are connected to other one by lines and
arrows which represent sequence and dependency
relationships (i.e., X must be done before Y can be done).
5. Objectives Of Flow Diagram
The flow charts indicates the sequence of events they do
not show the movement of men, material etc but the
path of movement can be better visualized by a flow
diagram.
Flow diagram is drawn to scale.
It shows the relative position of machines, jigs, fixture,
gangway etc and mark the paths followed by men and
material.
Distances between two location is indicated in flow
diagram.
6. Steps in drawing a Flow Diagram
Draw to scale the plan of the work area.
Mark the relative position of machine tools, benches,
store, racks, inspection tables etc.
From the different observations, draw the actual
movement of the material or worker on the diagram.
Indicate the direction of movement.
Mark the distances between consequence two locations.
7. CHARTS AND DIAGRAMS
USED IN METHOD STUDY
Following chart are used in method study :(1) OPC - Outline process chart
(2) FPC - Flow process chart
Man type
Material type
Equipment type
(3) Two handed process chart
(4) Multiple activity chart like man and machine chart
(5) SIMO chart
8. The following diagram are also used in method study.
(1) Flow diagram
(2) String diagram
(3) Cycle graph
(4) Cronocycle diagram
(5) Travel diagram
10. FLOW PROCESS CHART
When the overall idea of the process has been established it is
possible to go into greater details. Flow process chart can be
defined as a graphical presentation of all operations,
inspections, delays and storages occurring during a process or
procedure which includes information considered necessary
for analysis like time required, quantity and distance moved
etc.
11. TYPES OF FLOW PROCESS
CHART
Man type
-
Material type
material.
- It records what happens to the
Equipment type
- It records how the equipment is used.
It records what the worker does.
12. Flow Process Charts
A flow process chart is a chart of all the activities
involved in a process.
It is similar to an operations process chart, except that
more detail is shown by including transportations and
delays as well as operations, inspections, and storages.
Not usually used for entire assemblies, it is used for
just one component (or operator)
Add in information on:
Operation duration (time to complete)
Distance traveled (for transport operations)
Good for showing savings of a new method.
13. Flow Process Charts (Cont.)
Process charts summarizes the whole process
They are used to compare the existing and the
proposed methods
Process is observed, who, what, where, when, and
how questions are asked
Every detail is understood and the chart of the
existing situation is drawn
14. 1.Operation
Process Chart Symbols
Indicates the main steps in a process, method or procedure.
Usually the part, material or product concerned is modified or
changed during the operation.
2.Inspection
Indicates an inspection for quality and / or check for quantity
3.Transport
Indicates the movement of workers, materials or equipment from place
to place
15. 4.Temporary Storage or Delay
Indicates a delay in the sequence of events : for example, work waiting
between consecutive operations, or any object laid aside temporarily without
record until required.
5.Permanent Storage
Indicates a controlled storage in which material is received into or issued
from a store under some form of authorization; or an item is retained for
reference purposes.
6.Combined Activities
Indicates a controlled storage in which material is received into or issued
from a store under some form of authorization; or an item is retained for
reference purposes.
24. Example
Typist has to take dictation from the author’s office. He
has to type the letter, copy the letter and get letters
attested by the author. He has to prepare the envelope
and put these letters in the envelope. Finally place the
letter and copy aside the tray. Author’s office is 20 feet
away from typist office.
40. Information shown in a flow process chart :(1) Type of the flow process chart.
(2) Information of the person producing the part
(3) Information , place ,time & name of operator for
whom the product or process is prepared.
(4) Different stages and their involved in the process.
(5) Transport activity , its various stages and distance
travelled in it
(6) Different stages of delay ,storage and inspection
(7) Summary information of activities
41. References
K.Narasimhan, “Handbook of Industrial Engineering: Technology and
Operations Management 3rd edition” Volume: 14 Issue: 6 2002.
RALPH M. BARNES , “MOTION AND TIME STUDY DESIGN AND
MEASUREMENT OF WORK” (7th EDITION)
Mahajan M.S., “Industrial management” 3rd Edition, 2008, Dhanpat Rai & Co.
(p) Ltd.
Khanna O.P., “Work Study (Time & motion Study),Reprint : 2003, Dhanpat Rai
& Co. (p) Ltd.
http://www.sil.org/lingualinks/literacy/ReferenceMaterials/glossaryofliteracyt
erms/WhatIsAFlowDiagram.htm