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Prepared by :-
Ajinkya Karlekar
The worker and machine process chart (Man-machine chart)
is used to study, analyze, and improve one workstation at a
time.
The chart shows the exact time relationship between the
working cycle of the person and operating cycle of the
machine.
These facts can lead to utilization of both worker and
machine time, and a better balance of the work cycle.
To detect the idle time on machine and workers
To optimize work distribution between workers and
machines.
To decide no. of workers in a group.
To balance the work team
To examine the activities.
It is used for recording the complex movements of
material or men.
To organize teams of workers on mass production
work.
Plant repair & maintenance.
Job construction.
Planning team work.
It is used to check whether the
work station is correctly located.
Independent Combined Ideal time
Activity Activity
7
8
TIME
(MIN)
MAN MACHINE TIME
(MIN)
0.2 Remove finished casting
cleans with compressed
air
IDLE 0.2
0.4 Gauge depth of slot on
surface plate
IDLE 0.4
0.8 PLACE in a box obtains
new casting
IDLE 0.8
1.0 Cleans machine with
compressed air
IDLE 1.0
1.2 Locates castings in
fixture, starts machine
IDLE 1.2
1.4 IDLE Cutting slot 1 1.4
1.6 IDLE Cutting slot 2 1.6
1.8 IDLE Cutting slot 3 1.8
2.0 IDLE Cutting slot 4 2.0
Example on Man Machine Chart (Present Method)
Man –
Machine
Working
Time
(min.)
Idle Time
(min.)
Utilizatio
n
(%)
MAN 1.2 0.8 60%
MACHINE 0.8 1.2 40%
9
CYCLE TIME(MIN)= 2.0
EXAMPLE ON MAN MACHINE CHART
(Summary of Present method)
TIME
(MIN
)
MAN MACHIN
E
TIME
(MIN)
0.2 REMOVED FINISHED CASTING
CLEANS WITH COM PRESED AIR
IDLE 0.2
0.4 CLEAN MACHINE WITH
COMPRESED AIR
IDLE 0.4
0.6 LOCATEES A NEW CASTING IN A
FIXTURE START MACHINE
IDLE 0.6
0.8 BREAKS SHARP EDGES WITH
FILES CLEANS WITH
COMPRESSED AIR
CUTTING
SLOT 1
0.8
1.0 GAUGE DEPTH OF SLOT ON
SURFACE PLATE
CUTTING
SLOT 2
1.0
1.2 PLACES CASTING IN A BOX
PICKS UP NEW CASTING AND
PLATE BY MACHINE
CUTTING
SLOT 3
1.2
1.4 IDLE CUTTING
SLOT 4
1.4
10
Example on Man Machine Chart (Improved Method)
EXAMPLE ON MAN MACHINE CHART
(Summary of Improved method)
CYCLE TIME(MIN)= 1.4
Man –
Machine
Working
Time
(min.)
Idle Time
(min.)
Utilizatio
n
(%)
MAN 1.2 0.2 85.7%
MACHINE 0.8 0.6 57.0%
11
COMPARISION BETWEEN
PRESENT AND IMPROVED METHOD
CYCLE
TIME
(MIN)
MAN IDLE
TIME(MIN
)
MACHINE
IDLE TIME
( MIN)
PRESENT
METHOD
2.0 0.8 1.2
IMPROVED
METHOD
1.4 0.2 0.6
12
THANK YOU

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Man and machine chart

  • 2. The worker and machine process chart (Man-machine chart) is used to study, analyze, and improve one workstation at a time. The chart shows the exact time relationship between the working cycle of the person and operating cycle of the machine. These facts can lead to utilization of both worker and machine time, and a better balance of the work cycle.
  • 3. To detect the idle time on machine and workers To optimize work distribution between workers and machines. To decide no. of workers in a group. To balance the work team To examine the activities. It is used for recording the complex movements of material or men. To organize teams of workers on mass production work.
  • 4. Plant repair & maintenance. Job construction. Planning team work. It is used to check whether the work station is correctly located.
  • 5. Independent Combined Ideal time Activity Activity
  • 6.
  • 7. 7
  • 8. 8 TIME (MIN) MAN MACHINE TIME (MIN) 0.2 Remove finished casting cleans with compressed air IDLE 0.2 0.4 Gauge depth of slot on surface plate IDLE 0.4 0.8 PLACE in a box obtains new casting IDLE 0.8 1.0 Cleans machine with compressed air IDLE 1.0 1.2 Locates castings in fixture, starts machine IDLE 1.2 1.4 IDLE Cutting slot 1 1.4 1.6 IDLE Cutting slot 2 1.6 1.8 IDLE Cutting slot 3 1.8 2.0 IDLE Cutting slot 4 2.0 Example on Man Machine Chart (Present Method)
  • 9. Man – Machine Working Time (min.) Idle Time (min.) Utilizatio n (%) MAN 1.2 0.8 60% MACHINE 0.8 1.2 40% 9 CYCLE TIME(MIN)= 2.0 EXAMPLE ON MAN MACHINE CHART (Summary of Present method)
  • 10. TIME (MIN ) MAN MACHIN E TIME (MIN) 0.2 REMOVED FINISHED CASTING CLEANS WITH COM PRESED AIR IDLE 0.2 0.4 CLEAN MACHINE WITH COMPRESED AIR IDLE 0.4 0.6 LOCATEES A NEW CASTING IN A FIXTURE START MACHINE IDLE 0.6 0.8 BREAKS SHARP EDGES WITH FILES CLEANS WITH COMPRESSED AIR CUTTING SLOT 1 0.8 1.0 GAUGE DEPTH OF SLOT ON SURFACE PLATE CUTTING SLOT 2 1.0 1.2 PLACES CASTING IN A BOX PICKS UP NEW CASTING AND PLATE BY MACHINE CUTTING SLOT 3 1.2 1.4 IDLE CUTTING SLOT 4 1.4 10 Example on Man Machine Chart (Improved Method)
  • 11. EXAMPLE ON MAN MACHINE CHART (Summary of Improved method) CYCLE TIME(MIN)= 1.4 Man – Machine Working Time (min.) Idle Time (min.) Utilizatio n (%) MAN 1.2 0.2 85.7% MACHINE 0.8 0.6 57.0% 11
  • 12. COMPARISION BETWEEN PRESENT AND IMPROVED METHOD CYCLE TIME (MIN) MAN IDLE TIME(MIN ) MACHINE IDLE TIME ( MIN) PRESENT METHOD 2.0 0.8 1.2 IMPROVED METHOD 1.4 0.2 0.6 12