Material Variance
Material Variance
(OP)
Hi all,
I got a big problem. Right now one of my projects is decrease the material variance in my department. Last month the material variance for my department was $31,439.33
As I said I need to improve this trending by July. How can I work with this issue because is affecting my goal and my manager goal.
Please Help Me to develop a plan and to run it with excellent results.
I got a big problem. Right now one of my projects is decrease the material variance in my department. Last month the material variance for my department was $31,439.33
As I said I need to improve this trending by July. How can I work with this issue because is affecting my goal and my manager goal.
Please Help Me to develop a plan and to run it with excellent results.





RE: Material Variance
- Visit the local scrap dealers and look at their inventory; it may once have been yours.
Mike Halloran
Pembroke Pines, FL, USA
RE: Material Variance
What you want to tell me when you said
Visit the local scrap dealers
Tyrone Jr.
RE: Material Variance
Drug addicts will steal _anything_ that can be sold for cash. Scrap metal dealers don't ask where the scrap comes from.
Do you conduct random drug tests in your plant? Start.
Mike Halloran
Pembroke Pines, FL, USA
RE: Material Variance
Determine which materials are inaccurate. Monitor usage of these materials on shop floor versus bill of material. Fix bill of material if in error.
Monitor your incoming materials. Do quantities and dollars match what you receive. Possible problems from purchasing and vendors and receiving.
Monitor materials for scrap and non-production usage.
RE: Material Variance
CODE
http://www.sacl.vuw.ac.nz/vuw/fca/sacl/files/WP27.pdf
http://www.principlesofaccounting.com/chapter%2022.htm
http://sine.ni.com/csol/cds/item/vw/p/id/126/nid/124100
http://www.bestsoftwareinc.com/PDF/pfw/broch/PFW_BatchMstr.pdf
But if your issue is inventory loss, then there are plenty of books on that subject available.
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RE: Material Variance
The guy was fired and the containers were not damaged again.
RE: Material Variance
What kind of material is causing the variance? Gold? Steel?
Chemicals?
What does the variance amount to in terms of volume or weight?
How can that much material be moved?
My wife worked in a place making electrical switches with gold contacts. Pilferage moved in less than teaspoon lots.
In our shop, that much variance would amount to roughly 30 tons of steel. We had variances like yours at one time. Investigation found that most of it came from poor nesting of parts processed on our CNC punches.
Chemicals could have their own set of problems such as improper handling, poor housekeeping, and valves and stoppers improperly used.
Just food for thought.
Griffy
RE: Material Variance
Composites and Airplanes - what was I thinking?
There are gremlins in the autoclave!
RE: Material Variance
I think Bill hit it on the head; review your inventory stock list and perform a visual count of stock. Verify usage on the production floor (material scrap, part rejects, etc.) and relate it back to the raw stock count.
You may find that you have unreported usage of stock, unreported scrap, damaged material that is being scrapped and not properly accounted for, etc.
Then you can go from there and wonder about misappropriation of materials (i.e. theft) and such.
RE: Material Variance
RE: Material Variance
A drawing specifies how a part is to look while a bill of material specifies what goes into a part. Think about a part with is 12 feet in length and you saw the part out of a 20 foot bar of raw material. The bill of material for this parts would say 20 feet as the required material while the part is 12 feet long.
Now lets talk about a 2" part using the same 20 foot bar. Lets say the saw kerf (width of blade) is .0625". The saw vice also need material to hang onto to allow sawing and lets say that is 6". Out of a 20ft bar the maximum number of parts is 113. (240"-6")/2.0625 BOM quantity is 20'/113 or .18 feet. or 2.12 inches. If the saw kerf varies so does the number of parts and the BOM.