Utilization on Multipurpose Machines
- October 9, 2018 at 3:50 am #56113
i am currently calculating utilization on a number of machines for one product group. There’s just one problem, most of the machinery is used for multiple product groups. How do i go about this, to get the utilization of only the product group i am working with.
Thanks in advance,
SimonOctober 9, 2018 at 9:40 am #203114October 9, 2018 at 10:32 am #203115
@mike-carnell yes they do schedule for production of various productsOctober 10, 2018 at 12:42 pm #203123
@simon19302 I am going to give you my perspective which probably will not line up with somebodies method. Mine is based on my time of owning a factory so basically what you do when it is your money.
If I schedule a machine for 1 hour and that part should run at 2 minutes per part then I know I need 30 parts per hour. If it takes me 20 minutes to set up then it cost me 10 parts to set up (profit on 10 parts). I base my productivity on a part every 2 minutes. I can run in excess of 100% productivity but the number of times I saw that in 9 years you can count on 1 hand.
I don’t like utilization as a metric. Production managers will build stuff you don’t need to get the number us. I ran 2 10hr shifts for 4 days so utilization is based on 80 hours. Anytime the machine was scheduled was the denominator. Any time we didn’t build for any reason planned or unplanned down time, lunch, break, etc had a negative impact on utilization. People like Production Managers do not like this. They want to pull out lunch and breaks and planned down time. If it isn’t building parts it isn’t being utilized to make money and that what this is all about.
If you do it this way all the industry benchmarks are going to be higher than yours. They are playing games. Your numbers will reflect reality.
Same thing goes with OT. If I build at 30 per hour and I run overtime because I was short 15 parts then that means I need to build the 30 parts for 1 hour + 15 parts I am behind so I have to build 45 parts on overtime other wise I have to much process time in each part.
Just my opinionOctober 17, 2018 at 8:01 am #203128
Simon, why would you want utilization of a machine that’s producing only part of its total production? I would think total utilization producing all parts is more of a typical question.
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