hi
2 ways to look at it.
item varience or piece variance.
example....
inventory has 10 items and each item has 10 pieces.
total items = 10. total peice = 10x10=100
you count. 9 items are correct. 1 item is short 1.
item varience = 9 out of 10 correct or 90% accuracy or 10% variance.
piece variance = 99 out of 100 correct or 99% acuracy or 1% variance.
I perfer the latter because it gives a better picture of how well you are
controling the inventory. the latter will also be supported by the $
variance.
variance will occur. don't be concerned about a item being off. be concerned
by how much it is off.
many things result in variance.
over issues
under issues
misplaced items
misdirected items
incorrect input
no input(worst-missing or lost paperwork)
bad cycle counts resulting in adjustments. (avoid adjustments).
COMPUTER GLITCHES - grrrrr
other(flukes)
good inventory control is the result of controling the sum of the above.
so to get piece variance.
subtract item counted from on hand balance. if negative numbers exist,
convert then to positive. =IF(B10-A100,B10-A10,(B10-A10)*-1) where a10 =QOH
and B10= count. adjust formula to fit your data.
sum the QOH for all items. sum the variance for all items.
divide sum of variances by sum of QOH=total piece variance.

regards
FSt1
member APICS


"Alex .P" wrote:

I already have a report in place with some data in it, so I have a total of
items counted and a total count of variences, how can I come up with a
percentage of the variences?