Larry, 1. Your article deals primarily with the use of SPC to review buffer penetration. It may be beneficial to include a mathematical formula for the...
Hi, Peter Thanks for your inputs. I will consider them as I revise the paper. I was reluctant to get into the buffer sizing calculations, as they are not the...
Larry, One of the reasons I took Wheeler's SPC class was essentially the same conclusion you've come to: "I think that is one reason PERT fails: it assumes...
Hi, Jim I appreciate your input on any topic. It is always worth the wait. My starting point in this paper is that the organization has successfully...
Hi, Peter Yes, there is an assumption when making a control chart that it is dealing with a single (hopefully eventually stable) process. Note that there are...
Much of the discussion on this CCPM Yahoo website has involved the concepts of uncertainty and variation. The attempts at understanding these in relation to...
Hi, Peter With understanding variation, your first paragraph does not make sense. I don't see anyone here assuming that "uncertainty can be made certain". It...
Peter What is the connection between the behaviour of a sub-atomic particle and the behaviour of a project? To point to the similarity of effects is only...
"More accurate means reducing variation." [Leach] If by more accurate, you mean a better fit with a future reality, then my contention is that it's not a...
Hi, Peter Yes, it appears to me to be you. Because there are many like you who do not know the meaning of accuracy, and use their own deterministic mindset to...
Peter, the nearest thing I have seen to your line of reasoning is called "Robust Decision Making". An exponent of the incorporation and combination of input...
Hi, David Thanks for bringing up David Ullman. He is an associate of mine. We just completed a two-year project together on Lean Project Management,...
Larry, I'll admit I could be wrong. I'm not adept in the heavier statistical math that is needed to completely understand the thinking. I've only recently...
David, Thanks for the suggested course of study. I'll do some Googling. I'm currently working through overviews of the work of Beer, Flood and Drescher,...
Hi, Peter When theorizing, I try to be wrong 50% of the time. That maximizes learning (really...Reinersten demonstrate this mathematically). ;-) Although not...
Hi, All I continue to have this stomach churn each time I see or hear someone refer to TOC as "holistic". (It turns just a little less than when I hear...
Hi Larry I finally managed to get from beginning to the end of your draft paper on Continuous Improvement in Projects today. I have had several attempts ...
Larry, The Central Limit Theorem needs the whole of the buffer to average out (a large enough sampling - 30 or more). I don't see how you can get any...
Peter It takes about the same time for a rocket to reach space as it does for me to boil an egg. That does not, however, suggest a relationship between rocket...
Larry, Re: accuracy and precision. Since as you say people often confuse these, and based on what I understood from your explanations, a useful mnemonic (if ...
... attempting to connect quantum uncertainty and project management. Justin, You want me to propose a common cause, but `cause' and `uncertainty' are mutually...
Kik, I like your explanation. To extend its ramifications: All tasks are a manifestation of common cause. Tasks not in statistical control also include...
Hi, ... Most scientists are still more comfortable with 'Newtonian' physics, which might be summed up as we, everything, are all composed of parts and the...
Hi, Larry! Without even knowing about this idea, I've analyzed the tasks attributed to one member of a project with a similar diagram, with the 7 working hours...
Hi, Kik Very nice. Thank you. One of the mistaken assumptions in PERT is that people can estimate the optimistic and pessimistic at the 3 sigma limits (that's...
Hi, Jim I am crushed. Boo Hoo. :-( In truth, I sincerely appreciate your time and input. Seems I have some work to do on the paper. I am unhappy with the...
Hi, Peter The central limit theorum is much more robust than you think. Run some experiments, and you may be surprised. I was. The additional insight you get...
* Hi Larry I will post a PDF file of a data set and the SPC charts given to me by Mike Dinham a few years ago – this is the sort of work I prefer to learn...
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