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07/01/2005 02:23 AM
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i feel mapping can find WIP,waiting waste.but other problems still need interview and documentations.
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07/10/2005 11:34 AM
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Jorge Cantu
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most of the waste in the maps shows up as inventory initially....doing the root cause analysis for each of those inventory accumulations would then give you the answers you are looking for (set-up, downtime, rework, information flow defficiencies, etc)
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07/15/2005 04:27 PM
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Mapping can find many problems, but remember it is a tool, and should not to be used in isolation. Be careful with value stream mapping. Toyota uses material & Information flow mapping (from which I believe VSM was developed). They do not concentrate on collecting a lot of data (Waste of overproduction of data).
They concentrate on looking for waste in the system. As you walk your floor developping your map, always look for the 7 forms of waste. Stop and observe what is actually happening. look at the 4 M's (inter-relations between Man, Material, Machine & Method).
As you develop your eye, you will discover a great deal of waste.
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09/07/2005 08:11 AM
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The VSm can find all you have in the shoop floor but remember that VSM is a picture of the day it means that you are going to solve the problems that you cath up in the work shoop, remember 80-20%, you can solve all the problems just be focused in the more importants.
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05/24/2006 08:55 PM
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I also use the old process flow charting forms and VSMs. The reason being, the VSMs although great tools don't really take into account travel distance for example. The process flow chart forms measure distance and actual time wasted in a variety of non-value-added items.
I'll try to attach a form so you can see what I am refering to. But together these tools work very well.
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05/24/2006 09:04 PM
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I tried posting but my server went down. Hopefully this won't be posted twice.
I tend to use the old process flow chart forms as well as VSMs. VSMs are great tools but the other form helps in that it can be used to measure time and distance for every step within a process.
I'll try to attach one of the forms so you can see what I'm refering to. I'm sure you recognize it as they've been around for quite some time. For me they work well with VSMs. And it is an easy tool for employees to use.
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06/02/2006 09:45 AM
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Can VSM find all the problems?
NO. The VSM gathers and displays whatever you collected.
If you only gather information for the data box that concerns inventory and cycle time and batch size, then you will only see problems with inventory, batch size, and cycle time.
I teach that VSM should gather the inportant information. To know what's important, you have to have some inkling of the problems to start with.
It is pretty safe to map inventory and distance and time but if (for example) I think I have a problem with maintenance, then I should have MTTF and MTBF or OEE on my map.
The VSM can only show the problems that we gather information.
Take care.
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06/02/2006 04:39 PM
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I use the following tools in this order: Spaghetti Diagram, Flow Process Chart, VSM, Material Handling Planning Chart, Timeline ==> Each tool tells just that extra knowledge than did the previous tools in the overall methodology! VSM alone is a terribly inadequate tool if one wishes to design a total system.
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