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The Fifth Primary Practice of Kanban - Reduce the Kanban Tokens   Message List  
Reply | Forward Message #4524 of 6116 |
Re: [kanbandev] The optimum (minimum) WIP limit Was Fifth Kanban Principle

Hello, chrismatts1968. On Monday, July 6, 2009, at 5:53:09 AM,
you wrote:

> I know its a bit rude for me to reply to my own post but I'd be
> interested in your thoughts on a minimum WIP limit above 1.
> Although in theory we could get to 1, I suspect that in practice
> it is not possible or desirable and that there is an optimal WIP limit above
one.

> It would be interesting to identify those factors that push that
> optimal above one, one being fixed costs per resource. Others being.... ?

Surely the biggest reason to have a WIP limit over 1 is so that
stations do not go idle waiting for something to do? Or am I
completely missing something? (It could happen.)

Ron Jeffries
www.XProgramming.com
www.xprogramming.com/blog
If it is more than you need, it is waste. -- Andy Seidl
Mon Jul 6, 2009 11:11 am

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ronaldejeffries
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Forward 		Message #4524 of 6116 |
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Karl I know its a bit rude for me to reply to my own post but I'd be interested in your thoughts on a minimum WIP limit above 1. Although in theory we could...
chrismatts1968
Offline Send Email 		Jul 6, 2009
9:53 am

Hello, chrismatts1968. On Monday, July 6, 2009, at 5:53:09 AM, ... Surely the biggest reason to have a WIP limit over 1 is so that stations do not go idle...
Ron Jeffries
ronaldejeffries
Offline Send Email 		Jul 6, 2009
11:11 am

On Mon, Jul 6, 2009 at 6:11 AM, Ron ... I think that's the core of it. i also think we end up pulling in a combination of kanban, flow, and theory of...
Derick Bailey
derickbailey...
Offline Send Email 		Jul 6, 2009
2:37 pm

... Derick Your example is spot on. The point I'm trying to get to is that even if we assume the team can swarm over a problem as Karl suggests, there are...
chrismatts1968
Offline Send Email 		Jul 7, 2009
1:12 pm

I think there is even more to it than flow mechanics. The cost of delay function under risk has so much uncertainty to it that it isn't reasonable to work on...
David J Anderson
netherby_uk
Offline Send Email 		Jul 7, 2009
4:31 pm

Hi, Ron, ... You're not missing something. In a deterministic process (i.e. no variability in process time), you'll find that in the long run W=T*r, where W is...
jornolabirkeland
jornolabirke...
Offline Send Email 		Jul 7, 2009
5:20 pm

Hi Chris 2009/7/6 chrismatts1968 <chrismatts1968@...> ... I'd agree. I'm not really suggesting its achievable to have a single kanban token. I am...
Karl Scotland
kjscotland
Offline Send Email 		Jul 8, 2009
11:14 pm

Karl Nice So the approach would be. Add the resource and then based on the emergent behaviour of the Kanban system, raise the limits if resources are starved....
chrismatts1968
Offline Send Email 		Jul 9, 2009
8:39 am

2009/7/9 chrismatts1968 <chrismatts1968@...> ... Did we get to agreement! So the approach would be. Add the resource and then based on the emergent ......
Karl Scotland
kjscotland
Offline Send Email 		Jul 9, 2009
9:29 pm

Karl and Chris, I really like Chris's reply to himself that begged the question again in order to bring specific clarity. Karl, what you said is what I was...
Jean Tabaka
jeantabaka
Offline Send Email 		Jul 10, 2009
1:21 am

So, relating this back to eliminating kanban (sorry, forgot to do that...) there needs to be 120 kanban in the original system, where the cars drive 30MPH....
Derick Bailey
derickbailey...
Offline Send Email 		Jul 2, 2009
7:08 pm
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