ΑΠΟΘΕΜΑΤΑ ΕΡΕΥΝΑ
DESCRIPTION
ΑΠΟΘΕΜΑΤΑTRANSCRIPT
. , , . . .
(inventory control) . , . , , , . .
. . . , .
, . , . super market 50% . . , , . , , .
, , . . , , .
. . , . , . , . , . , .
. , . , , .
, .
) (holding/storage cost). , , , (handling) . , . .
) . . , (setup), .
) / (shortage cost). , .
, . , . , . , , . . , 1000 , 4000 . . . , , .. , .
, , , , , . . (cycle inventory) . . , , . .
, (safety stock inventory). . . , .
(anticipation inventory) . , 90% . , . . (pipeline inventory). . .
. . . , , , , . , , .
. , , .
,
, .
, . , .
. , . C , , ... . , , . . . , ABC , , .
, 15-20% 70-75% . . 20-25% 20-25 % . C , 10-15% , . ABC . , , , . , . , , . , . , . .
: 1. ( ) 2. ( ).
. . , . , . , . , .
, . , . , (.. ), . , , , . , .
, . , , . R, Q. , R, . R . , R, . L, .
:
,
.
, (), (). , , .
. , p d .
, p-d . . , d. , . , , . , . Q , p-d Q/p . :
Q/2 , max/2. H , D d , :
ch . Q :
> .: 30 . 190 , 10.500 , 200, 0,21 350 . , , . :
:
:
:
. , . Q1 p1, Q1 Q2 p2 Q2 , p3. , , . , (Q) , pi (i= 1,2,3) :
.
Q . , , .
, , . , , . .
1. () Qi, i=1,2,, ( Qi Qi)
2.Y Q0 () pi Q03.H Q0 Qi, i=1,2,,
: .
0-299 .
60 300-499 .
58,8 500- .
57 6.500 . 50 25% . .
1: ( 57)
213,57 60 57. Q57 .
1: 58,8
210,28 60 58,8. Q58,8 .
1: 58,8
60. 2: . :
500 . , . , . , . , , . , i :.
q si i. i :
295 m3 . (ch) 2 (cp) 12 . .
(/2) . , q=0, 336 m3 , 295. q>0, q=0.5 313 m3 . q=1 . q=1. .. . . , , .
, , Qmax. , Qmax (). () Qmax, . , , :
n=1/ D/2n=DT/2 .
, , .
:
, . ( ) . , . , . .
. , . . , .
. Lead Time ( ) , . Lead Time . Lead Time. Lead Time.
2 . . , , (safety stock) Lead Time.
. (service level).
Lead Time . . 90% Lead Time 0,9, 0,1. .
, Lead Time , . Lead Time Lead Time Lead Time. Lead Time Lead Time. :R = +
Lead Time LT Lead Time. , d z . . .
: . 30 5 . 10 . 95%.
:
:
z .