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Messages 1709 - 1738 of 14564   Oldest  |  < Older  |  Newer >  |  Newest
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1709 Christian Lochbihler
namlos2002 Offline Send Email
Jul 1, 2004
10:48 am
Larry, if I understand correctly, CCPM applies a somewhat modified PERT- approach to activity duration estimates. The underlying central limit theorem however,...
1710 Christian Lochbihler
namlos2002 Offline Send Email
Jul 1, 2004
10:49 am
Though I really appreciate the insightful theoretical discussions on special vs. common-cause let me suggest the following practical view: (1) There is one...
1711 lawrence_leach Offline Send Email Jul 1, 2004
10:24 pm
Hi, David I feel The Force beginning to recover from the brink of chaos... One can get too pedantic about anything. Indeed, people almost always do. One way I...
1712 lawrence_leach Offline Send Email Jul 1, 2004
10:29 pm
Hi, Christian If not, make another assumption. As a project manager, you have the power! A common assumption is to assert that any bias experienced to date ...
1713 lawrence_leach Offline Send Email Jul 1, 2004
10:45 pm
Hi, Christian Thanks for a thoughtful input! I'm OK with keeping it at two categories, though. Those within the tasks, which I am calling common-cause, and...
1714 lawrence_leach Offline Send Email Jul 1, 2004
10:55 pm
Hi, Richard Data is one way to identify special-causes...not the only way. Althoug Deming notes there is hazard in other ways, we have to deal with the hand we...
1715 lawrence_leach Offline Send Email Jul 1, 2004
10:58 pm
Hi, Richard Well, at least we agree on one thing! ;-) Regards, Larry Leach, PMP ... special causes on critical chain projects, the measurement system is ...
1716 Christian Lochbihler
namlos2002 Offline Send Email
Jul 2, 2004
10:03 am
Let's assume we've to manage a project with three activities A, B, and C to be performed in a strictly sequential mode: Activity A – duration (mean) – 10...
1717 mbr@...
matiasbirrell Offline Send Email
Jul 2, 2004
2:52 pm
Why do you need to adjust? As I can see in your example, the three events are independent regarding the causes for their variation, so that it's very unlikely...
1718 Richard Zultner
rzultner Offline Send Email
Jul 2, 2004
3:02 pm
"Doug Brown" <doug.brown@...> wrote: I think that generally special causes should not be included in the project buffer. [REZ>] Why not? What is...
1719 Doug Brown
padgett-brown Offline Send Email
Jul 2, 2004
6:41 pm
With regard to Christian's question: The buffers are assigned at the project or chain level to get us out of the problem where every task has its own buffer...
1720 David J. Anderson
netherby_uk Offline Send Email
Jul 2, 2004
7:09 pm
... "David J. Anderson" <netherby_uk@...> Hence, the concept of uncontrolled variation is not synonymous with assignable cause but Deming clearly uses...
1721 Rob Newbold
robertnewbold Offline Send Email
Jul 2, 2004
11:07 pm
Richard - ... 50% ... This ... buffer ... result ... the ... are ... when ... Maybe they can't, maybe they can. People at all levels -- individual...
1722 Piet Holbrouck
pietholbrouck Offline Send Email
Jul 3, 2004
11:05 am
Rob Newbold wrote: But it's true, I couldn't come with a good reason why 50% buffers are "reasonable," other than through empirical evidence. In fact, in some ...
1723 Richard Zultner
rzultner Offline Send Email
Jul 5, 2004
5:52 pm
"Doug Brown" <doug.brown@...> wrote: The other suggestion is to recalculate the buffers after the completion of each task. [REZ>] You mean, to...
1724 Edgard Calia
edgardcalia Offline Send Email
Jul 6, 2004
12:19 am
The (only ) advantage of the 50% buffer (and I think it is the reason of its existance) is that it is simple for quick calculations or presentations, and it...
1725 David J. Anderson
netherby_uk Offline Send Email
Jul 6, 2004
1:54 pm
With respect Richard, you are clearly on a completely different wave length. The specification limit for a project is the project promise (which presumably has...
1726 Richard Zultner
rzultner Offline Send Email
Jul 6, 2004
4:53 pm
"David J. Anderson" <netherby_uk@...> wrote: With respect Richard, you are clearly on a completely different wave length. The specification limit for a...
1727 David J. Anderson
netherby_uk Offline Send Email
Jul 6, 2004
5:12 pm
We're just going to have to disagree on this! If you can't come around to the notion that the promise - whatever it is and however loose or tight and however ...
1728 Rob Newbold
robertnewbold Offline Send Email
Jul 6, 2004
8:43 pm
... "cutting ... I thought we had beaten this horse enough, but in poking around some old emails I found one from Frank Patrick from the APICS list (1999) with...
1729 Rob Newbold
robertnewbold Offline Send Email
Jul 6, 2004
8:54 pm
Richard - ... And ... be. ... fine. ... My experience is that this depends on how buffer sizing is presented. If the statistical theory is presented...
1730 TSUTTON@...
aramatmcm Offline Send Email
Jul 7, 2004
5:07 am
I will be out of the office from 07/06/2004 until 07/13/2004. I will respond to your message when I return....
1731 Clarke Ching
clarkeching Offline Send Email
Jul 7, 2004
9:14 pm
... Hi, sorry about the delay in responding. I did start writing something towards answering your question but got side-tracked. I suggest you take a look at...
1732 Richard Zultner
rzultner Offline Send Email
Jul 8, 2004
3:23 am
... solid explanation of buffer sizing. My experience is that this depends on how buffer sizing is presented. If the statistical theory is presented...
1733 Christian Lochbihler
namlos2002 Offline Send Email
Jul 8, 2004
12:56 pm
... Looks like I haven't been able to get my point across ... sorry about that. What I'm really looking for is an answer to the question of HOW to create...
1734 Christian Lochbihler
namlos2002 Offline Send Email
Jul 8, 2004
4:30 pm
... <Richard@Z...> wrote: [REZ>] I don't see ANY use for common and special causes in PLANNING a CC project. [They are important if you are going to do process...
1735 Rob Newbold
robertnewbold Offline Send Email
Jul 8, 2004
5:47 pm
Richard - ... haul, ... of ... Actually, I was referring to 50% buffer sizing, which in the default case seems to be what you call the "1/3 estimate." ... ...
1736 Doug Brown
padgett-brown Offline Send Email
Jul 8, 2004
5:55 pm
Christian: I find that the fever charts that came up on this group a while back tell the story in a way that is pretty easy to understand (and also gives you...
1737 Christian Lochbihler
namlos2002 Offline Send Email
Jul 9, 2004
7:24 am
... back tell the story in a way that is pretty easy to understand (and also gives you the trend analysis that perhaps goes to the heart of the special vs...
1738 Nitin Bhide
nitinbhide Offline Send Email
Jul 9, 2004
9:50 am
Hi, Just saw this item on yahoo news and checked the website. http://www.openworkbench.org/. This seems to be mature project management tools. Does anyone know...
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