【正文】 1/1 ?=?=Using data from the reorder point under uncertainty example, the service level would be: ,2 )322/6。 78 CR (2023) Prentice Hall, Inc. Pull Methods (Cont’d) 、多地點(diǎn)的庫(kù)存管理 Multiple item, multiplelocation control The theory that has been discussed previously is useful when designing inventory control systems for the practical problem of controlling many items at many locations. Consider how a specialty chemical pany designed such a practical system. TASO（訂單積累時(shí)間） is the time to accumulate a stock order (truckload) for all items in warehouse. 79 Q1 Stock order TASO TASO LT Order received LT Q2 M 0 Quantity on hand Time M = maximum level TASO = time to accumulate stock order Qi = order quantity LT = lead time TASO ~ ~ Q3 MultipleItem, MultipleLocation Control CR (2023) Prentice Hall, Inc. 960 80 Customer Service Level For individual items The service level (stock availability) actually achieved by inventory control methods is not best represented by the probability (P) of a stockout during the lead time. It is more accurate to pute it as follows. QEsDQDEsSL zz )(39。預(yù)測(cè)時(shí)還要記錄所持庫(kù)存量，而訂購(gòu)量就等于目標(biāo)值減去所持庫(kù)存量。 74 CR (2023) Prentice Hall, Inc. MinMax Inventory Control ~ Q1 Q2 Q* ROP q LT LT Time Quantity on hand M Add increment ROP?q to order size 954 75 CR (2023) Prentice Hall, Inc. Pull Methods (Cont’d) The T, R, M variant This is a bination of the minmax and the periodic review systems. The stock levels are reviewed periodically, but control the release of the replenishment order by whether the reorder point is reached. This method is useful where demand is low, such that small quantities might be released under a periodic review method. 76 CR (2023) Prentice Hall, Inc. Pull Methods (Cont’d) T,R,M variant LT LT T T Time R q Inventory level T = review time R = reorder point M – Q = replenishment quantity 補(bǔ)給量 Q1 Q2 Inventory not below R, so don’t place an order 956 77 CR (2023) Prentice Hall, Inc. Pull Methods (Cont’d) Stock to demand (a periodic review method) 對(duì)某種產(chǎn)品的需求速率進(jìn)行預(yù)測(cè)。*i=?=?= iii szdTFind target quantity (MAX) for item B units *39。A LTTssAthen z80%= units 579)()(30)( 39。 ) ( 39。 ???=)DC(I)S2(OTiii*where O = mon procurement cost, $/order 訂購(gòu)采購(gòu)的聯(lián)合成本 下標(biāo) i代表某種特定產(chǎn)品 Note: Q* = T*xd CR (2023) Prentice Hall, Inc. 949 69 ? 每種產(chǎn)品的最高庫(kù)存水平 * d ( * ) ( 39。*=?=?==?=?=LTTssLTTdXdFind MAX MAX = d(T* + LT) + z(s’) = 50( + 3) + () = 470 + = 541 units Rule Review the inventory every weeks and place an order for the difference between the MAX level of 541 units and the quantity on hand + quantity on order – backorders. CR (2023) Prentice Hall, Inc. 942 66 CR (2023) Prentice Hall, Inc. Periodic Review (Cont’d) 總相關(guān)成本 The total relevant cost for this design is: TC = DS/Q + ICQ/2 + ICr + ks’(D/Q)E(z) = 2600(10)/322 + (.10)(5)(322/2) + (.10)(5)(71) + 2 ()(2600/322)(.0034) = $198 Note 與再訂貨的點(diǎn)的方法比（ $182），定期盤點(diǎn)因?yàn)榘踩潭雀?，所以成本相?duì)較高（ $198） 67 Pull Methods (Cont’d) D a t eIn /C u st o me r S a l esOnh a n d D a t eIn /C u st o me r S a l esOnh a n d D a t eIn /C u st o me r S a l esOnH a n d1 0 / 2 6 B al F w d 80500 2 / 2 C o p i es 50000 35000 3 / 3 0 S u p M ea t s 25000 202301 0 / 2 6 100M 180500 2 / 5 B el G ar 5000 30000 3 / 3 0 C o p i es 50 199501 0 / 3 0 P r o g r essi o n 20230 160500 2 / 6 B el G ar 15000 15000 3 / 3 0 P t r s D v l 5000 149501 0 / 3 0 O g l eb y 25000 135500 2 / 6 S u p erio r 25000 0* 3 / 3 0 B el m o n t 10000 49501 1 / 2 M i d R o ss 15000 120500 2 / 6 U n t S p l y 15000 0* 4 / 2 B erea P r t g 4950 01 1 / 9 U n t S p l y 50000 70500 2 / 6 B erea P r t g 15000 0* 4 / 2 B erea P r t g 15050 0*1 1 / 2 9 B erea Li t 25000 45500 2 / 8 S ag amo r e 5000 0* 4 / 9 R EM 500 0*1 2 / 1 D o l F ed 10000 35500 2 / 1 4 100M 100000 4 / 1 2 M i d R o ss 5000 0*1 2 / 1 3 C ard F ed 20230 15500 2 / 1 5 50M 150000 5 / 7 O h i o O st 5000 0*1 2 / 1 4 B el m o n t 15000 500 2 / 1 6 B el G ar 5000 145000 5 / 8 I n k sp o t s 5000 0*1 2 / 1 5 S h k r S av 5000 500* 2 / 2 1 B el G ar 15000 130000 5 / 8 P r t s D v l 2500 0*1 / 8 B F K 500 0 2 / 2 6 I n k sp o t 5000 125000 5 / 1 1 100M 1000001 / 8 100M 100000 2 / 2 7 Lcl 2 5 U A W 50000 75000 5 / 1 4 B V R 5000 950001 / 8 C ard F ed 30000 70000 2 / 2 8 P t r s D v l 2500 72500 5 / 1 5 G u sw o l d 10000 850001 / 9 P t o f V i ew 10000 60000 2 / 2 8 S h k r S av 25000 47500 5 / 1 6 ES B 15000 700001 / 1 7 A m S afet y 5000 55000 3 / 1 C o p i es 35000 12500 5 / 1 6 S u p erio r 50000 202301 / 2 3 F o st er 15000 40000 3 / 2 U n t d To r 10000 2500 5 / 1 6 J Ste p h en 5000 150001 / 2 4 G i b P r t g 5000 35000 3 / 8 S ag amo r e 2500 0 5 / 1 6 A m A st er 15000 01 / 2 6 B el G ar 5000 30000 3 / 8 S ag amo r e 12500 0* 5 / 1 6 A m A st er 10000 0*1 / 2 6 C o p i es 20230 10000 3 / 1 2 150M 150000 5 / 2 2 S ag amo r e 15000 0*1 / 2 9 S l v r Lak e 5000 5000 3 / 1 2 U n t d To r 40000 110000 C o d i n g 212001 / 2 9 100M 105000 3 / 1 2 P r est o n 50000 60000 M . B a se C o st D a t e M i n 125M2 / 2 S ag amo r e 20230 85000 3 / 2 0 M i d l an d 15000 45000 2 . 6 4 4 / 2 M a x 250MS i ze M / Wg t B a si s G ra i n C o l o r Fi n i sh G ra d e L o ca t i o n C t n . S k i d C o n t . A t t .8 189。 Given: d = 50 units/week C = $5/unit sd = 10 units/week LT = 3 weeks I = 10%/year P = S = $10/order k = $2/unit Good method for products: low value are purchased from the same vendor economies of scale in production, purchasing, and transportation 938 62 9