Re: [UrbanSim-Users] ELCM and scalable jobs

From: Hana Sevcikova <hana_at_cs.washington.edu>
Date: Mon, 03 Mar 2008 15:45:16 -0800

Mark,

The jobs are separated into industrial, commercial, home-based and
scaling (i.e. governmental) type according to their building type. In
your case:

152317 + 152442 + 73647 + 151697 = 530103

This corresponds to the number of movers that the relocation model
determines.

Within these four models the jobs are processed in sub-models which are
determined by their sector ids. (The Scaling Job Model does not have
sub-models but is also processed by sectors.)

The Distribute Unplaced Jobs Model then takes all jobs that are still
unplaced after running those four models and places them according to
the current distribution of jobs by sector.

If you get 228799 unplaced jobs it can be for two reasons:

1. There is not enough capacity (you should be able to find out from the
log file)

2. Your specification does not include all sub-models. For example, if
your specification for commercial ELCM contains sub-models 1,2, and 3,
but there are commercial jobs of sectors 4 and 5, those jobs would not
be considered by any of the ELCMs, neither by the scaling jobs model -
they would be located by the Distribute Unplaced Jobs Model. But they
would be included in the sum of the 'total number of individuals' in the
commercial ELCM.

Does it help?

Hana

Mark Kryvobokov wrote:
>
>
> Hello!
>
> Our simulation is running without errors. I want to understand some
> points there:
>
> 1. What are 'total number of individuals' in industrial, commercial and
> home-based ELCM? We have the following total numbers: 152317 industrial,
> 152442 commercial and 73647 home-based. The sum of them all is 378406,
> which is much lower than the number of movers that equals to 530103 (the
> result of the Employment Relocation Model). As I understand, we have
> 530103 jobs (new and relocated), which should be moved to gridcells. The
> 'total number of individuals' in ELCM is not the same? Industrial,
> commercial and home-based jobs are distinguished by building_type? In
> this case governmental building_type is not considered?
>
> 2. What is 'number of scalable jobs' in the Scaling Jobs Model and the
> Distribute Unplaced Jobs Model? We have 151697 and 228799 respectively.
> As I understand, jobs are relocated within sectors according to
> distribution of existing jobs in the former model and randomly in the
> latter model. At the same time I see that the building_type is used in
> both cases. So, jobs are relocated considering sector_id or
> building_type or both? In our case I again can't find a link between the
> number of jobs, which should be moved (within sectors or building
> types), and the numbers of scalable jobs.
>
> Mark
>
>
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Received on Mon Mar 03 2008 - 15:45:19 PST

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