Time and Labor Analysis for Whiskehrs GM-506 Mini CraneDate: 26 November 2013. Site: Malpani Saffron, Beside Hotel Express Inn, Pathardi Phata, Nashik .

Machine was installed on 10th floor. Brick’s were unloaded on 8th floor. Weight of 1 (6 inch) fly ash brick is approximately 5.5 kilograms. 4 labors were utilized (1 operator, 2 for loading and 1 for unloading).

Trial No Up Time Down Time Loading Time Unloading Time1 1.30 min 1.30 min 1.10 min for 40 bricks 1.10 min for 40 bricks2 1.30 min 1.30 min 1.25 min for 50 bricks 1.40 min for 50 bricks3 1.30 min 1.30 min 2.30 min for 60 bricks 2.30 min for 60 bricks

From the above observation 1 cycle of 60 bricks takes 8 min i.e. approximately 8 cycles per hour. So we have 64 cycles per day (assuming 1 day of 8 hours working). Therefore we get 3840 bricks lifted per day on 8th floor. 3360 bricks lifted per day (assuming 7 hours of actual working).

Actually we can put 65 bricks (357.5 kg’s) in the bucket which can give us 4160 bricks per day.3640 bricks lifted per day (assuming 7 hours of actual working).

Let’s assume 10 cycles were utilized in lifting Cement and Sand so we have 54 cycles for the day and we can lift up to 3510 bricks per day.

Note:

It was observed by operator/site supervisor that with existing cranes they are able to unload approximately 2000 bricks per day.

Loading was done by 2 labors and unloading was done by single labor.

Bricks were loaded properly into stack to avoid any accident. This consumed extra time for trial no.3.

Extra 5-10 seconds utilized in adjusting the boom according to the site conditions (Protecting Net), is included.

Conclusion:

1. GM-506 Whiskehrs Mini Crane can work approximately double the efficiency.

2. It can improve the efficiency further saving time if used with Swivel Bucket/False Bottom for easy unloading.

3. If one extra bucket is used 30% further efficiency can be improved by saving load time.

Cost Benefit:

As GM-506 Whiskehrs Mini Crane has double the efficiency, 4 labors can be saved for 13 days. On monthly basis 26 day work will be done in 13 days, assuming 300 rupees per day for male labor and 200 rupees for female labor per

day. For male labor 300*2*13=7,800 rupees. For female labor 200*2*13=5,200 rupees. So we save 13,000 rupees per month.

Annual Saving as 12*13,000 Rupees = 1,56,000 Rupees.