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zambri

#9125

Machine utilisation | 7 October, 1999

I am interested in seeing how some of you calculate machine utilisation. Currently this was calculated off against the uptime. I really believe there is a better way of doing it i.e if I were to calculate this against machine's capacities. Any feedback is appreciated.

cheers.. zambri

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Scott S. Snider

#9126

Re: Machine utilisation | 7 October, 1999

| I am interested in seeing how some of you calculate machine utilisation. Currently this was calculated off against the uptime. I really believe there is a better way of doing it i.e if I were to calculate this against machine's capacities. Any feedback is appreciated. | | cheers.. | zambri | The best way to calculate utilzation is :

(placement time + travel time)/24 hours

If you want to look a little better : (placement time + travel time)/Power On time

Almost all machines give managment data to do these calculations. If you don't have that information available then track: Placments/24 hours Scott S. Snider

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JAX

#9127

Re: Machine utilisation | 7 October, 1999

| | I am interested in seeing how some of you calculate machine utilisation. Currently this was calculated off against the uptime. I really believe there is a better way of doing it i.e if I were to calculate this against machine's capacities. Any feedback is appreciated. | | | | cheers.. | | zambri | | The best way to calculate utilzation is : | | (placement time + travel time)/24 hours | | If you want to look a little better : | (placement time + travel time)/Power On time | | Almost all machines give managment data to do these calculations. If you don't have that information available then track: | Placments/24 hours | Scott S. Snider | Zambri, Scott is right on. If you don't feel like doing this yourself and If you have the money to spend and plan on this being a vital part of your operations I would suggest you look into CIMCIS. They have multiple products for this and are versatile depending on your machine types(i.e. Fuji, Universal, ect. )

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Paul Gerits

#9128

Re: Machine utilisation | 13 October, 1999

Hi Zambri,

I work for Philips EMT (supplier of SMT equipment) as technical consultant and application specialist.

depending on what you want to know there are several ways to calculate machine utilisation.

1) Machine efficiancy.

Available uptime = Total time - Scheduled stops (breaks, maintance, change overs etc.)/ total time

Line uptime = available - unscheduled / available

Overall eff. = available uptime * line uptime.

2) Machine output.

Normaly every machine has a management system which tells you what the output is. In case you do not have it you can calculate as folows.

Net output = (time mesured/mesured run-time pcb) x number of components per pcb.

Gross output = (3600sec./ calculated run-time pcb) x number of components per pcb.

Be aware that the net output is depending on how well the machine is setup and how the operators, logistic, mainenance etc. is organized. A relation of that can be found in the efficiancy. Therefor one alwys has to calculate both. The gross output states what should be possible to reach.

Regards,

Paul Gerits.

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