Man and machine chart

Man and machine chart

1. Man and Machine Chart (Multiple activity chart) Prepared by :- Ajinkya Karlekar

2. Man and Machine chart 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. Objectives of Man and Machine chart 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. Application of Man and Machine chart Plant repair & maintenance. Job construction. Planning team work. It is used to check whether the work station is correctly located.

5. Colours /Symbols used in Man and Machine chart Independent Combined Ideal time Activity Activity

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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 Locate s 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)

8. Man – Machine Working Time (min.) Idle Time (min.) Utilization (%) 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)

9. TIME (MIN) MAN MACHINE 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)

10. EXAMPLE ON MAN MACHINE CHART ( Summary of Improved method) CYCLE TIME(MIN)= 1.4 Man – Machine Working Time (min.) Idle Time (min.) Utilization (%) MAN 1.2 0.2 85.7% MACHINE 0.8 0.6 57.0% 11

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

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