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Cost Efficiency of My Spot Welder
Cost Efficiency of MySpot: 1
Product

80 x 160 x 5000 mm

Total spot welding points

50

Production volume/day

30 units

Item 
Rivetting Machine 
MySpot 
Number of Personnel Required 
3 
2 
Time requested for setting 
3 people x 10 sec x 30 units ï¼ 900 sec
ï¼ 0.25 h x $40 per hour = $10 
2 people x 5 sec x 30 units ï¼ 300sec
ï¼ 0.08 h x $40 per hour = $3.4 
Welding Time 
6 sec per spot x 50 points x 30 units
= 9,000 sec = 150 min.
= 2.5 hours x 3 people x $40 Per hour = $300 
3 sec per spot x 50 points x 30 units
= 4,500 sec = 75 min.
= 1.25 hours x 3 people x $40 Per hour = $100 
Total Cost 
$310 per day 
$103.40 per day 
Cost efficiency 
$310  $103.40 = $206.60 x 20 days per month = $4,132 
Cost Efficiency of MySpot: 2
Product 
Cabinet Box
500 x 980 x 1880 mm 
Total spot welding points 
138 
Production volume/day 
20 
Item 
Conventional Spot Welder 
MySpot 
Number of personnel required 
3 
2 
Time requesting for setting 
3 people x 10 sec x 3 times x 20 units
ï¼ 1800 sec ï¼ 0.5 h x $40 per hour = $20 
2 people x 5 sec x 3 times x 20 units
ï¼ 600 sec ï¼ 0.17 h x $40 per hour = $6.8 
Welding time 
6 sec per spot x 138 points x 20 units
=16,560 sec = 276 min
= 4.6 hours x 3 people x $40 per hour = $552 
3 sec per spot x 138 points x 20 units
= 8,280 sec = 2.3 hours x 2 people
x $40 Per hour = $184 
Putty Work 
Putty (2kg) = $20
5 min per unit x 20 unit = 100 min = 1.7 hour
1.7 hour x $40 Pre hours = $68 
not required 
Grinder finishing 
3 sec Per point x 138 points x 20 units = 8,280 sec
=2.3 hours x 2 people x $40 Per hour = $184 
not required 
Control working environment 
Running cost of air purifier 8 hours = $2 per day 
$954 per day 
Cost Efficiency 
$826  $190.8 = $635.2 x 20 days per month = $12,704

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