Genel Planlı stoksuzluk durumunda Envanter Modeli Planlı stoksuzluk durumunda envanter modeli ? Genelde birok envanter probleminde stoksuzluk istenmemesine karşın, pahalı mallar sz konusuysa, elde tutma maliyeti ok yksek olacağından, stoksuzluk planlanır, izin verilir. ? Planlı stoksuzluk modelinde talep zamanında karşılanmaz, mşteri siparişi yapar ve bekler.Bu varsayımlara ESM modelini uygularsak: 61 This document was created with free TRIAL version of eXPert PDF.This watermark will be removed after purchasing the licensed full version of eXPert PDF. Please visit www.visagesoft.com for more details? Sabit talep ? Tm siparişler aynı anda teslim ? S stoksuzluk miktarı (karşılanamayan talep) ? X sipariş miktarı ? Sipariş edilen X gelince ,nce S stoksuzluk karşılanır, kalan stoklanır. ? X-S max. Stok ? T siparişler arası sre ( t 1 +t 2 ) t 1 =stok olan dnem, t 2 = stoksuz dnem 62 This document was created with free TRIAL version of eXPert PDF.This watermark will be removed after purchasing the licensed full version of eXPert PDF. Please visit www.visagesoft.com for more details1 X S t c ? ? 2 S t c ? 1 t 2 t S ? X S ? stok zaman a günlük talep T X T c ? 63 This document was created with free TRIAL version of eXPert PDF.This watermark will be removed after purchasing the licensed full version of eXPert PDF. Please visit www.visagesoft.com for more detailsstoksuzluk Toplam M =Stok tutma+siparişverme+stoksuzluk Stok tutma Mal= ortalama stokX birim stoklama mal Ortalama stok=( (x-S) .t 1 +0. t 2 ) / t 1 +t 2 = Stok tutma mal= [(X-S) 2 / 2.X ] . E Sipariş Verme Mal= sipariş sayısı Xbir.sipariş verme m Sipariş Verme Mal= (C/X) . B Stoksuzluk maliyeti=ortalama stoksuzluk dzeyiX birim stoksuzluk maliyeti 64 This document was created with free TRIAL version of eXPert PDF.This watermark will be removed after purchasing the licensed full version of eXPert PDF. Please visit www.visagesoft.com for more details? Ortalama stoksuzluk=[(S/2).t 2 ] /T ? Ortalama stoksuzluk= S 2 / 2X ? d= birim stoksuzluk mal. ? Stoksuzluk mal=[ S 2 / 2X]. d Top.Mal=[(X-S) 2 / 2.X ] . E + (C/X) . B +[ S 2 / 2X].d X*= ? [2CB/E](E+d)/d S*=?2CBE/d.(E+d) 65 This document was created with free TRIAL version of eXPert PDF.This watermark will be removed after purchasing the licensed full version of eXPert PDF. Please visit www.visagesoft.com for more details? Yeniden sipariş nok=c.m - S 66 This document was created with free TRIAL version of eXPert PDF.This watermark will be removed after purchasing the licensed full version of eXPert PDF. Please visit www.visagesoft.com for more detailsEkonomik retim Miktarı Modeli ? ESM modelinden farkı, siparişler bir defada gelme yerine , belli bir dnem boyunca srekli olarak aynı miktarda gelir.(sabit arz) ? Model sadece retim hacmi, talepten byk ise uygulanır. ? Talepten fazla retildiğinden, hergn bir miktar stoklanarak, retim dnemi boyunca stok artar. ? retim bittikten sonra yeni dneme kadar stoklar azalır. 67 This document was created with free TRIAL version of eXPert PDF.This watermark will be removed after purchasing the licensed full version of eXPert PDF. Please visit www.visagesoft.com for more details? C= talep ? R= kapasite ? R>C ? c = günlük talep ? r= günlük üretim ? t= üretim dönemi (gün) ? r-c = günlük stoklanan miktar 68 This document was created with free TRIAL version of eXPert PDF.This watermark will be removed after purchasing the licensed full version of eXPert PDF. Please visit www.visagesoft.com for more details? Maksimum stok= (r-c).t ? t dnemindeki retim= X= r.t ? Max.stok= (1-c/r).X ? Ort.stok= 1/2 . (1-c/r).X ? Stok tutma mal= (ort. Stok) .E ? retime hazırlık mal= yıllık retim dnemi sayısı . Birim hazırlık mal 69 This document was created with free TRIAL version of eXPert PDF.This watermark will be removed after purchasing the licensed full version of eXPert PDF. Please visit www.visagesoft.com for more details? Yıllık retime haz. Mal= C/X . B ? TM= C/X . B + 1/2 . (1-c/r).X . E ? X*= ?2CB/ (1-c/r).E ? C/R=c/r ? YSN=c.m 70 This document was created with free TRIAL version of eXPert PDF.This watermark will be removed after purchasing the licensed full version of eXPert PDF. Please visit www.visagesoft.com for more detailsEconomic Production Quantity (EPQ) ? Same assumptions as the EOQ except: inventory arrives in increments & is drawn down as it arrives 71 This document was created with free TRIAL version of eXPert PDF.This watermark will be removed after purchasing the licensed full version of eXPert PDF. Please visit www.visagesoft.com for more detailsEPQ Equations ? Total cost: ? Maximum inventory: ? d=avg. daily demand rate ? p=daily production rate ? Calculating EPQ ? ? ? ? ? ? ? ? ? ? ? ? ? ? H 2 I S Q D TC MAX EPQ ? ? ? ? ? ? ? ? ? ? p d 1 Q I MAX ? ? ? ? ? ? ? ? ? ? p d 1 H 2DS EPQ 72 This document was created with free TRIAL version of eXPert PDF.This watermark will be removed after purchasing the licensed full version of eXPert PDF. Please visit www.visagesoft.com for more detailsEPQ Problem: HP Ltd. Produces its premium plant food in 50# bags. Demand is 100,000 lbs. per week and they operate 50 wks. each year and HP can produce 250,000 lbs. per week. The setup cost is $200 and the annual holding cost rate is $.55 per bag. Calculate the EPQ. Determine the maximum inventory level. Calculate the total cost of using the EPQ policy. ? ? ? ? ? ? ? ? ? ? ? ? ? ? H 2 I S Q D TC MAX EPQ ? ? ? ? ? ? ? ? ? ? p d 1 H 2DS EPQ ? ? ? ? ? ? ? ? ? ? p d 1 Q I MAX 73 This document was created with free TRIAL version of eXPert PDF.This watermark will be removed after purchasing the licensed full version of eXPert PDF. Please visit www.visagesoft.com for more details