Line study for balancing line

1. Line Study of Sewing
Section
(a detail overview)

2. Line Study
 Line study means by studying sewing line collecting
essential data to understand the current situation of
the line and improve the line condition if needed

3. Tools required
 Stop watch
 Pen
 Paper
 calculator

4. Line Study involves
 Precedence diagram
 Target setting
 Operation bulletin
 Line selection
 Paper Layout & Layout
 Line setup (manpower & machine setup)
 Time study
 Line efficiency

5. Precedence diagram
 The precedence diagram method (PDM) is a tool for
scheduling activities in a project plan. It is a method of
constructing a project schedule network diagram that uses
boxes, referred to as nodes, to represent activities and
connects them with arrows that show the dependencies.

6. Target setting
 Formula
Target per hour= Total no of operators X 60 /garment SAM
Check current hourly operator production report. Draw a straight
line with target output data on the line graph.

7. Operation bulletin
A basic operation bulletin contains following information.
 Total SMV (Sewing SMV and Non-sewing SMV)
 OB prepared by (Name of the Engineer)
 Job code
 Operation description
 Machine description
 SMV @ 100% Efficiency
 SMV @ target efficiency%
 Calculated production per hour
 no. of machines
 Estimated production per unit hours
 Any remarks
 Machine summary list

8. Line selection
Factor of selecting line
 Line area
 Machine availability
 Line availability

9.  Line setup
Line setup means machine set up according to layout and
required manpower allotment.
 Time study
The aim of time study is to establish a time for a qualified worker
to perform specified work under stated conditions and at a
defined rate of working.
Total 5 to 10 cycle time need to take to find out average time
and production per hour.
After performing time study line efficiency can be easily
measured

10.  Line Efficiency
After performing time study line efficiency can be easily
measured by using formula
Efficiency=(production per hour*SMV*100)/(working
hour* manpower*60)