To add the cost of machine energy to each job, how should I do that? Is it right to take machine power consumption times price per kWh times machine time? This sees to be an accurate way but most of the manufactures do not calculate energy cost this way. I am so confused..
yiyi
the machine will have a watt rating. Watts X hours on / 1000 = KWH used. Multiply that by your rate and you have your cost.
So if it is 750 watts that is .75 KWH for 1 hour. If you cost is 20c/KWH then it costs 15c to run it for an hour.
So if it is 750 watts that is .75 KWH for 1 hour. If you cost is 20c/KWH then it costs 15c to run it for an hour.
Thanks Binki!
it seems to be right, but, I dont know, i am just a student i am doing this cost calculation for a company for my graduation project, cuz from what i have learnt from text book machine energy costs are always treated as an overall cost that needs to be allocated on some base to the order, that would be easier.
Now for this real-world situation I got confused buz if you calculate it as the way you said, does it mean that the energy costs for a machine is a direct cost? which is so different from what i have learnt from school
(...
I have stuck to this forever now for my project... maybe this is a real-world way to calculate the cost....
Thanks for your reply anyway... but I am still confused....
it seems to be right, but, I dont know, i am just a student i am doing this cost calculation for a company for my graduation project, cuz from what i have learnt from text book machine energy costs are always treated as an overall cost that needs to be allocated on some base to the order, that would be easier.
Now for this real-world situation I got confused buz if you calculate it as the way you said, does it mean that the energy costs for a machine is a direct cost? which is so different from what i have learnt from school
(...I have stuck to this forever now for my project... maybe this is a real-world way to calculate the cost....
Thanks for your reply anyway... but I am still confused....
We spread utilities over all jobs on a % basis. Basically we figure if utilities are $100/month and we gross $10,000 month then each job will get 1% assigned for it's share of utilites. There are other ways to do it but that is how we think here.
Also electronic stores sell devices you can plug that will evaluate or calculate the usage - your bill will give you the rate and you can do the math. A lot of work - the average method is the best or easiest.
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