Logistics Engineering Design Constants

Transcription

1 Logistics Engineering Design Constants 1. Circuity Factor: 1.2 ( g ) 1.2 GC distance actual road distance 2. Local vs. Intercity Transport: Local: < 50 mi use actual road distances Intercity: > 50 mi can estimate road distances mi return possible (11 HOS) > 250 mi always one way transport > mi intermodal rail possible 3. Inventory Carrying Cost ( h ) = funds + storage + obsolescence 16% average (no product information, per U.S. Total Logistics Costs) 5 10% low value product (construction) 25 30% general durable manufactured goods 50% computer euipment >> 100% perishable goods (produce) 31

2 Logistics Engineering Design Constants 4. Value Transport Cost 1: $1 ft 3 $2,620 Shanghai LA/LB shipping cost 3 2,400 ft 40 ISO container capacity 5. TL Weight Capacity: 25 tons ( K wt ) (40 ton max per regulation) (15 ton tare for tractor trailer) = 25 ton max payload Weight capacity = 100% of physical capacity 6. TL Cube Capacity: 2,750 ft 3 ( K cu ) Trailer physical capacity = 3,332 ft 3 Effective capacity = 3, ,750 ft 3 Cube capacity = 80% of physical capacity Truck Trailer Cube = 3,332-3,968 CFT Max Gross Vehicle Wt = 80,000 lbs = 40 tons Max Payload Wt = 50,000 lbs = 25 tons Length: 48' - 53' single trailer, 28' double trailer Max Height: 13'6" = 162" Interior Height: (8'6" - 9'2" = 102" - 110") Width: 8'6" = 102" (8'2" = 98") 32

3 Logistics Engineering Design Constants 7. TL Revenue per Loaded Truck Mile: $2/mi in 2004 ( r ) TL revenue for the carrier is your TL cost as a shipper 15%, average deadhead travel $1.60, cost per mile in 2004 $ $ $1.88, cost per loaded mile 6.35%, average operating margin for trucking $2.00, revenue per loaded mile 33

4 Truck Shipment Example Product is to be shipped in cartons from Raleigh, NC (27606) to Gainesville, FL (32606). Each unit weighs 40 lb and occupies 9 ft 3, and units can be stacked on top of each other in a trailer. One Time Shipments (operational decision): know Know when and how much to ship, need to determine if TL and/or LTL to be used Periodic Shipments (tactical decision): know f, determine Need to determine how often and how much to ship 34

5 1. Assuming that the product is to be shipped P2P TL, what is the maximum payload for each trailer used for the shipment? wt max K wt 25 ton K cu 2750 ft 3 s 40 lb/unit 3 9ft /unit lb/ft 3 K cu cu max cu max s 2000 skcu 2000 wt cu skcu max min max, max min Kwt, (2750) min 25, ton

6 2. Next Monday, 350 units of the product are to be shipped. How many truckloads are reuired for this shipment? ton, 2 truckloads 2000 max Using the most recent rate estimate available, what is the TL transport charge for this shipment? d 532 mi c r TL July 2017 TL 2004 TL PPI PPITL r2004 $2.00 / mi PPI $2.00 / mi $ / mi rd ( )(532) $2, max

7 4. Using the most recent LTL rate estimate, what is transport charge to ship the fractional portion of the shipment LTL (i.e., the last partially full truckload portion)? ton r frac LTL max LTL frac frac d 2 s s 2s $ / ton-mi (4.49) 14 2 c r d ( )(532) $1, LTL PPI LTL 37

8 5. What is the change in total charge associated with the combining TL and LTL as compared to just using TL? cc c c TL TL1 LTL rd rd rltl frac d max max $

9 6. What would the fractional portion have to be so that the TL and LTL charges are eual? ctl( ) rd max rltl( ) PPILTL d c ( ) r ( ) d LTL LTL arg min c ( ) c ( ) I TL LTL ton 2 s s 2s

10 7. What are the TL and LTL minimum charges? MC MC TL LTL r 45 $ PPILTL d $ Why do these charges not depend on the size of the shipment? Why does only the LTL minimum charge depend of the distance of the shipment? 40

11 Independent Transport Charge ($): TL TL LTL LTL c0( ) min max c ( ), MC,max c ( ), MC Independent shipment charge: Class 200 from to Transport Charge ($) Shipment Size (ton) 41

12 8. Using the same LTL shipment, find online one time (spot) LTL rate uotes using the FedEx LTL website frac ton (2000) 1778 lb Most likely freight class: 40 lb/unit s 3 9 ft /unit Class Density Relationship lb/ft Class 200 What is the rate uote for the reverse trip from Gainesville (32606) to Raleigh (27606)? 3 42

13 The National Motor Freight Classification (NMFC) can be used to determine the product class Based on: 1. Load density 2. Special handling 3. Stowability 4. Liability 43

14 CzarLite tariff table for O D pair cwt hundredweight 100 lb ton Tariff (in $/cwt) from Raleigh, NC (27606) to Gainesville, FL (32606) (532 mi, CzarLite DEMOCZ , minimum charge = $95.23) $ 44

15 9. Using the same LTL shipment, what is the transport cost found using the undiscounted CzarLite tariff? , class 200 disc 0, MC B i arg i B i1 B B B arg B 3 B i arg B ctariff 1disc max MC,min OD( class, i)20, OD( class, i 1)20 i 10max 95.23, min OD(200,3) 20(0.8889), OD(200,4) 20(1) max95.23, min (99.92) 20(0.8889), (81.89)20(1) max 95.23,min 1,776.23,1, $1,

16 10. What is the implied discount of the estimated charge from the CzarLite tariff cost? disc ctariff c LTL c tariff 1, , , % What is the weight break between the rate breaks? W i OD( class, i 1) OD( class, i) B i $ (1) ton TC tariff w/o Break TC tariff ton 46