Value Stream Mapping (VSM) Information - Manufacture of fasteners in punch presses

D

djaphro

#11
Re: Value Stream Mapping Information needed

Thank you wayne. If you look at this attachment i've included, how do you arrive at the I values of 620, 2150, 500, 4200 etc.. Excuse me if its naive...
 

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D

djaphro

#12
Re: Information about Value Stream Mapping needed

In the VSM.xls attachment how do you arrive at the I values of 620, 2150, 500, 4200 etc..
 
W

wmarhel

#13
Re: Value Stream Mapping Information needed

Thank you wayne. If you look at this attachment i've included, how do you arrive at the I values of 620, 2150, 500, 4200 etc.. Excuse me if its naive...
Those are the number of pieces of inventory in between each of the identified processes. Since your daily demand is 8005 pieces, you have less than a day's worth of inventory between process steps.

Wayne
 
W

wmarhel

#15
Re: Value Stream Mapping Information needed

you mean to say, any number less than 8005 is alright?
Not at all. I would need to see your process, and understand the work that is involved or takes place at each process step. You may very well need to create some inventory between process steps due to the imbalance between the various processes. Think of, "The Goal" and the Theory of Constraints. In the Demand Flow Technology (DFT) approach, this is referred to as an In-Process-Kanban (IPK).

Ideally, the processes would flow from one to another with no need to have any inventory between the steps. But that is the ideal scenario and not always possible to accomplish without some serious effort if at all.

The next preferred method would be a FIFO (First-In-First-Out) Flow. Think of an assembly line operation where the next part in the line is the one worked on. The space between operations effectively restricts the amount of WIP that can build up between any two operations.

Third, we would have kanban which can either draw from a supermarket or other inventory location, or be used to just signal production of a fixed quantity.

The last, and most common method, is the traditional batch-and-queue where inventory builds up between processes.

Without understanding your exact process and the type of work performed at each operation, it would be next to impossible for anyone to give you an honest assessment about how much is too much.

As a rule of thumb though, if inventory builds up between processes then there is an area ripe with opportunity. Use the visual cue of inventory piles/skids/etc.; as an area to review with a little more attention and ask yourself why it is there and how much is really necessary?

Wayne
 
S

S Johnson

#16
Re: Value Stream Mapping Information - We manufacture fasteners in punch presses

Here's an Excel Template I got a while back from an online course. To get a good introduction, get "Learning to See" by Rother and Shook. Amazon.com has it. eBay has it sometimes. VSM is way to much to cover in a discussion board like this, unless you have a specific question.
 
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D

djaphro

#17
Re: Value Stream Mapping Information - We manufacture fasteners in punch presses

Thank you for your assistance Johnson. But i hate to say that the excel tool that you provided doesnt wana load and pops up a run time error. Appreciate your time.
 
J

juliov

#18
Re: Value Stream Mapping Information - We manufacture fasteners in punch presses

can you load up to the corrected Excel tool? thanks!
 
F

Frank T.

#19
Re: Value Stream Mapping Information - We manufacture fasteners in punch presses

I have attached a couple powerpoint presentation on VSM that helped me, maybe it will be of value to someone else....
 

Attachments

Last edited by a moderator:
S

S Johnson

#20
Re: Value Stream Mapping (VSM) Information - Manufacture of fasteners in punch presse

Not sure what the problem could be. I've downloaded it on two different PCs and it worked fine for me. I'm using Excel 2003. Perhaps you have a setting in Excel preventing the Macro from running? Email me here [stlramsfan(at sign)hotmail.com] if you want me to email it to you directly to see if that works.
 
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