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Re: [OT] PERT diagrams
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| Ioannis Vranos 2005-02-23, 4:02 pm |
| Stewart Gordon wrote:
> I can't quite make sense of this source - why is it the intervals
> between tasks, rather than the tasks themselves, that take the time?
As it is mentioned, the circles represent events in a project. The
problem is, the OP's "jobs" are computer processes or projects? If they
are computer processes, then the subject becomes UML sequence diagrams.
>
>
> They're quite different from the PERT diagrams from when I went to
> college. But with the same basic purpose.
>
> The PERT diagrams of my college days involved boxes like this
>
> +--------------+
> | 14 | 3 | 17 |
> |--------------|
> | Do something |
> |--------------|
> | 19 | 5 | 22 |
> +--------------+
>
> where the boxes are (IIRC)
>
> +---------------------------+
> | early | duration | early |
> | start | | finish |
> |---------------------------|
> | task description |
> |---------------------------|
> | late | slack | late |
> | start | | finish |
> +---------------------------+
:-)
--
Ioannis Vranos
http://www23.brinkster.com/noicys
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| Stewart Gordon 2005-02-23, 4:02 pm |
| Ioannis Vranos wrote:
> Stewart Gordon wrote:
>
>
> As it is mentioned, the circles represent events in a project.
The first source you cited numbers circles from 1 to 12, and then lists
what look like tasks, not events, again numbered from 1 to 12. So it
seems a plausible interpretation that the numbered list is explaining
the circles. By this, it's indicating that it takes no time to write
the text or to copyedit and format, but it takes time to transition
between the two activities.
> The problem is, the OP's "jobs" are computer processes or projects? If they
> are computer processes, then the subject becomes UML sequence diagrams.
<snip>
I don't see any reason a project can't be made up of computer processes.
It happens with me quite a lot.
Moreover, I suppose PERT or similar could be used to evaluate algorithms
involving some element of parallel processing....
Stewart.
--
My e-mail is valid but not my primary mailbox. Please keep replies on
the 'group where everyone may benefit.
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| Ioannis Vranos 2005-02-23, 4:02 pm |
| Stewart Gordon wrote:
> The first source you cited numbers circles from 1 to 12, and then lists
> what look like tasks, not events, again numbered from 1 to 12. So it
> seems a plausible interpretation that the numbered list is explaining
> the circles. By this, it's indicating that it takes no time to write
> the text or to copyedit and format, but it takes time to transition
> between the two activities.
There it is mentioned:
"Circles represent events in a project."
As task in the other link is mentioned the duration itself.
As far as I know the interpretation goes like this:
1. write text (max: 13 days)
After that in parallel:
2. copyedit and format (max: 7 days)
4. take and gather photographs (max: 17 days)
and so on.
> I don't see any reason a project can't be made up of computer processes.
> It happens with me quite a lot.
>
> Moreover, I suppose PERT or similar could be used to evaluate algorithms
> involving some element of parallel processing....
Yes I guess so. UML Sequence diagrams can also provide the entire
life-time of objects though.
--
Ioannis Vranos
http://www23.brinkster.com/noicys
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