Try creating a Resource Group (A) to represent your machine that has a two shift calendar capacity defined.
Then create two Resources (A1 & A2) underneath it that have single shift calendar capacities defined (one day, one night).
Make sure you have "number of concurrent operations" set to one.
All that is left to do is to modify your Standard Operation to call for the Resource Group (A) instead of the specific day or night shift Resource.
The Global Rescheduler should then schedule any Engineered Jobs that call for the Standard OP (referencing the Resource Group) into which ever Resource (day shift or night shift) is available.
Because you have "number of concurrent operations" set to one, it should do so without breaking either the day or night shift set up of the machine.
This should work as long as your Jobs are lot sized to consume a single shift's capacity - or if the day/night changeover time is inconsequential and not indicated as a single set up in the MoM OP details.
If you occasionally have Jobs that must run across both day and night shift, the model required to support both conditions starts to get much more complex.
To enable the scheduler to handle the occasional exception of this condition, you will have to create two more resource groups (B & C). The first (B) will be identical to the group (A). The second (C) will be nearly identical to the group (A) described above except you will indicate 2 concurrent Operations are possible.
Under each, create a single Resource (B1 & C1) with 2 shift calendar capacities defined. The difference is, because C & C1 have 2 concurrent Operations enabled, their calendar will have to be set up to represent only 1/2 the true hours of each shift.
One of these Resources (C1) will act as a total capacity limiter and serves no other purpose.
You will now need to modify the Standard OP described above to not only require your original Resource Group (A), but to also require the Resource you have chosen to act as the total capacity (2 shift) limiter (C1).
Continue to use this Standard OP in any MoMs that are for Parts that are always lot sized to complete in a single shift.
Now create a second Standard OP that requires resource group (B) and resource (C1). Use this standard OP in any Part MoMs that are lot sized to run across multiple shifts.
Frankly, all of this complexity would be entirely unnecessary if Vantage simply supported finite Resource Groups (that could then act as overall capacity limiters) and allowed the the number of concurrent OPs to be over-ridden at the MoM level.
This 'design gap', combined with its useless support of forward scheduling (not even up to 1970's standards) makes it one of the weakest finite model schedulers I've seen in 20 years. The level of complexity of the capacity models you need to create (and maintain - forever) in order to trick it into handling what are simple 'real world' finite scheduling conditions is absurd.
But it will work.
Rob Brown
Versa Products
Jim Selinger <
jim@...> wrote: Anyone have any ideas?
Otherwise, I will have to 'fool' Vantage into thinking one machine is two, by creating another work center. I want to avoid that if I can and am wondering if anyone else has a fix or a thought on this?
Thanks.
Best Regards,
<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
Jim Selinger
Production Scheduler
Kocsis Bros. Machine Co.
11755 S. Austin Ave.
Alsip, IL 60803
Phone: (708) 597-8110
Fax: (708) 389-0792
jim@...
-----Original Message-----
From:
vantage@yahoogroups.com [mailto:
vantage@yahoogroups.com]On Behalf Of Jim Selinger
Sent: Monday, June 04, 2007 11:01 AM
To:
vantage@yahoogroups.com
Subject: [Vantage] Scheduling question
Importance: High
I need some help on this one. We have two machines which can have two or more jobs setup at a time. For the most part, we will run one job on days and one job on nights. I want to be able to schedule the machines where one job runs on days, while another job runs at night. Can I do this without adding a workcenter? For lack of a better term, I want to be able to 'split' the machine.
Please help me out. Thank you all very much.
We are running version 6.10.521.
Thanks,
Jim
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