Machine Set up Biweekly or Monthly

[Kavitha_G]

Hello All,

Need suggestions on how to model the following scenario

I am working with Yearly volumes of  100 parts being produced in 15 different machines. 

Sample MU values: Part A - 800000 and Part B - 100000 parts being planned for whole year 

For Part A on Machine A set up needs to be done once every month for a certain setup time value

For Part B on Machine A set up needs to be done every 15 days.

Likewise have for remaining parts with Monthly & Biweekly set up schedule.

Please suggest modeling approaches for the same.

Regards,

Kavitha

[Steffen_B]

Do you mix up the parts on the machines or do you produce a period only A, than B ...?

[Nomden]

You can use the setting SetupAfterNumParts on the Set-up tab. Hence, N=800000/12~66667 parts.

In reality, the set-up/preventive maintenance may be scheduled at specific times or depend on more complicated aspects. But the above setting can already give you the correct number of set-ups per year at about the correct time.

[Kavitha_G]

Its a Product Mix which gets loaded in a station.

My input data is organized like this

Part Name  Station   Annualvolume SetupFrequency  Set Up Time 

A                  StationA  800000          Monthly                 30 Mins

B                  StationA   10000            Bi Weekly               45 Mins

C                  StationA   80000            Bi Weekly                35 Mins

D                   StationB 100000            Monthly                 30 Mins

[Nomden]

Yes, but the question is what causes the set-ups. Is there a set-up at the start of each production run of a part?

[Kavitha_G]

Yes.

[Steffen_B · Accepted solution]

it could work with the setting: Set-up depends on: user defined atttribute

If you check the last set up date of a part type against the simulation time, you can change a user defined attribute, that triggers the set-up (see example entrance control of the singleProc).

[Nomden]

In that case the default settings should already work, as long as the MU Names reflect the part names. If you make sure that the proper amounts of your parts pass a station, the correct set-up behavior will result.

[Kavitha_G]

Thanks Steffen for the solution.