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

J

juliov

#1
Hello there Quality pros,

I need info about Value Stream Mapping, maybe can you guys share a sample copy of how this map will look, also, a future state map.
There is a lot of info about it everywhere but is too discrete, let's see a complete before and after map.
We manufacture fasteners in punch presses, low variety, high volume production. We slit the incoming steel coils and then send the coil to our presses depending on the size of the clip. Clips range from .429" to .730" in width and .039" thick. small pieces. we have about 25 presses.
 
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M

Madfox

#4
Re: Need info about Value Stream Mapping...

What is VSM?
It's simply putting throughput data on a process map!

Why re-invent the wheel?
a) Most companies "process depictions" really don't go into very much detail regarding their operations. So, do an extreme makeover regarding the intricasies of your manufacturing operation.
b) You don't need all those fancy squiggles and other forgettable symbology. As, I've recommended elsewhere, simply make material a fat line/arrow and information a skinny line/arrow.
c) Determine your cycle time. I'm not a supporter of "takt time," it seems to be degrading to the employees in regards to X seconds/widget. Relax, think about an hourly or shift average.
d) Figure out the current throughput for the macro process (end output) and then the individual micro processes. Actually, I bet you probably have a good enough approximation already. Consultants who stand there with stopwatches are subject of Heisenberg's principle.
e) Vary the width of the process map's material flow arrows relative to the overall cycle time; wider if faster than the macro process time, narrower if slower.
f) Then I color-code areas, green if faster, red if slower.
Shazaam, done with Round 1. Just adjust the map and flow lines when changes are made.

It isn't rocket science, but consultants tend to present it as such! One company I visit re-does their line everyday! The manuf eng. recomputes and allocates machinery/personnel each afternoon for tomorrow's production schedule!

The Madfox
 

rudolfrm

Starting to get Involved
#5
Re: Information about Value Stream Mapping needed

OK, I would like to know more about VSM, could you tell me or give me more information?

thank you

rudolfo
 
G

gszekely

#6
Re: Information about Value Stream Mapping needed

Hello rudolfrm !
Your question is too generic.
What you know ?
What you would like to know ?
Have you searched the forum, and read old topics ?
Did you scroll down to the bottom of the page and read similar threads ?
Did you open and read the informations on the other sites posted ?
If yes please let us know, what is the question, you could not find the answer. You need to put some effort to go through the basics before you ask a so general question, otherwise we should write a book here.
Hope this helps.
I have attached a VSW how to, I found on LEI website recently.
Br
György
 

Attachments

D

djaphro

#8
Re: Information about Value Stream Mapping needed

Hello Peacewong,

Thank you for the template. Could you please explain how you calculate the Inventory or work in progress between each process in the VSM chart?
 
D

djaphro

#9
Re: Information about Value Stream Mapping needed

could someone please help me the formulae for calculating inventory between processes in Value stream Map?
 
W

wmarhel

#10
Re: Information about Value Stream Mapping needed

could someone please help me the formulae for calculating inventory between processes in Value stream Map?
Just go count it. I'm not being sarcastic or anything but that is the whole point behind mapping the value stream, you actually start at your shipping dock and walk the process backwards. Don't just pull the data from the MRP/ERP system.

As far as number of days of inventory just take total number of pieces (WIP) between processes and divide that by the number of units produced per day. Don't worry about the minor components or even the "C" inventory items.

Wayne
 
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