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MRP and ERP
McGraw-Hill/Irwin Copyright © 2012 by The McGraw-Hill Companies, Inc. All rights reserved.
You should be able to:1. Describe the conditions under which MRP is most appropriate2. Describe the inputs, outputs, and nature of MRP processing3. Explain how requirements in a MPS are translated into
material requirements for lower-level items4. Discuss the benefits and requirements of MRP5. Explain how an MRP system is useful in capacity
requirements planning6. Outline the potential benefits and some of the difficulties
users have encountered with MRP7. Describe MRPII and its benefits8. Describe ERP, what it provides, and its hidden costs
12-2Student Slides
Master ProductionMaster ProductionScheduling (MPS)Scheduling (MPS)Master ProductionMaster ProductionScheduling (MPS)Scheduling (MPS)
Material RequirementsMaterial RequirementsPlanning (MRP)Planning (MRP)
Material RequirementsMaterial RequirementsPlanning (MRP)Planning (MRP)
Capacity RequirementsCapacity RequirementsPlanning (CRP)Planning (CRP)
Capacity RequirementsCapacity RequirementsPlanning (CRP)Planning (CRP)
AggregateAggregatePlanningPlanning
AggregateAggregatePlanningPlanning
ResourceResourceRequirementsRequirements
PlanningPlanning
Material Requirements Planning (MRP)
Dependent demandDemand for items that are subassemblies or
component parts to be used in the production of finished goods.
Dependent demand tends to be sporadic or “lumpy”Large quantities are used at specific points in
time with little or no usage at other times
12-5Student Slides
Material requirements planning (MRP):
A computer-based information system that translates master schedule requirements for end items into time-phased requirements for subassemblies, components, and raw materials.
The MRP is designed to answer three questions:1. What is needed?2. How much is needed?3. When is it needed?
Student Slides12-6
Student Slides12-7
MRP processing takes the end item requirements specified by the master schedule and “explodes” them into time-phased requirements for assemblies, parts, and raw materials offset by lead times
Student Slides12-8
The MRP is based on the product structure tree diagram
Requirements are determined level by level, beginning with the end item and working down the tree The timing and quantity of each “parent” becomes the
basis for determining the timing and quantity of the “children” items directly below it.
The “children” items then become the “parent” items for the next level, and so on
Student Slides12-9
Begins with number of end items neededAdd service parts not included in MPSExplode MPS into gross requirements by
consulting bill of materials fileModify gross requirements to get net
requirements:Net Requirements = Gross Requirements
+ Allocated Inventory+ Safety Stock
- Inventory On HandOffset orders to allow for lead time
Student Slides12-11
Student Slides12-12
Student Slides12-13
Enables managers to easily determine the quantities of each component for a given order
size To know when to release orders for each component To be alerted when items need attention
Additional benefits Low levels of in-process inventories The ability to track material requirements The ability to evaluate capacity requirements A means of allocating production time The ability to easily determine inventory usage via backflushing
Exploding an end item’s BOM to determine the quantities of the components that were used to make the item
12-14Student Slides
To implement an effective MRP system requires: A computer and the necessary software to handle
computations and maintain records Accurate and up-to-date
Master schedulesBills of materialsInventory records
Integrity of data files
12-15Student Slides
Manufacturing resources planning (MRP II) Expanded approach to production resource planning,
involving other areas of the firm in the planning process and enabling capacity requirements planning
Most MRP II systems have the capability of performing simulation to answer a variety of “what if” questions so they can gain a better appreciation of available options and their consequences
Student Slides12-16
Enterprise resource planning (ERP) ERP was the next step in an evolution that began with
MRP and evolved into MRPII
ERP, like MRP II, typically has an MRP core
Represents an expanded effort to integrate standardized that will permit information sharing among different areas of an organization in order to manage the system more effectively
ERP systems are composed of a collection of integrated modules
Student Slides12-17
ERP strategic implications High initial cost High cost to maintain Need for future upgrades Intensive training required
ERP as a strategic planning tool Can improve supply chain management Stronger links between their customers and their
supplier Makes the organization more capable of satisfying
changing customer requirements Offers opportunities for continuous improvement
12-18Student Slides
LocoMopeds is a manufacturer of off-road mopeds. The following product structure diagram represents the bill of materials for its dual-carburetor Model 442 moped. MOPEDMOPEDMOPEDMOPED
ENGINEENGINEASSEMBLYASSEMBLY
ENGINEENGINEASSEMBLYASSEMBLY
MOTORMOTORMOTORMOTOR CARBURETORCARBURETOR(2)(2)
CARBURETORCARBURETOR(2)(2)
GASGASTANKTANKGASGASTANKTANK
WHEELWHEELASSEMBLYASSEMBLY
(2)(2)
WHEELWHEELASSEMBLYASSEMBLY
(2)(2)
HUB HUB ASSEMBLYASSEMBLY
HUB HUB ASSEMBLYASSEMBLY TIRETIRETIRETIRE
FRAMEFRAMEFRAMEFRAME
Level 0Level 0
Level 1Level 1
Level 2Level 2
Bill of MaterialParent Component LevelCompon.Code Code Code Description Req’d
442 0 #442 Moped
442 EA 1 Engine Assem.1GT 1 Gas Tank 1WA 1 Wheel Assem. 2F 1 Frame 1
EA M 2 Motor 1C 2 Carburetor 2
WA HA 2 Hub Assem. 1T 2 Tire 1
Inventory Status Report
ItemItemCodeCode
On-On-HandHand
SafetySafetyStockStock
LotLotSizeSize
LeadLeadTimeTime
Sched. ReceiptsSched. ReceiptsQnty. WeekQnty. Week
442442 500500 200200 LFLLFL 11 ---- ----
EAEA 300300 100100 500500 11 10001000 1010
GTGT 600600 200200 LFLLFL 22 900900 1010
WAWA 500500 400400 500500 11 20002000 1010
FF 600600 00 20002000 33 20002000 1010
MM 250250 00 LFLLFL 11 ---- ----
CC 150150 100100 2000+2000+ 22 ---- ----
HAHA 100100 00 LFLLFL 11 24002400 1111
TT 500500 500500 10001000 33 3000,20003000,2000 11,1211,12
The company is currently planning production for weeks 10 through 16. Based on existing orders and demand forecasts, the master production schedule is as follows:
Master Production Schedule: #442 Moped
Determine the MRP schedule required to support the master production schedule for the Model 442 moped in weeks 10-16.
1111
13001300 800800 12001200 14001400
1010 16161515141413131212
00 10001000 00
WEEKWEEK
QUANTITYQUANTITY
MRP Schedule for #442 Mopeds for Weeks 10 - 16, considering that:Gross Requirements come from the moped
MPSThere is an On-Hand balance of 500 mopeds at
the end of week 9There are no Scheduled Receipts for mopeds A lot-for-lot rule is used for ordering mopedsSafety stock of 200 mopeds is desiredLead time for mopeds is one week
MRP Schedule for #442 Mopeds . . . Initially
GROSS REQUIREMENTSGROSS REQUIREMENTS
SCHEDULED RECEIPTSSCHEDULED RECEIPTS
AVAILABLE (ON-HAND = 500) AVAILABLE (ON-HAND = 500)
NET REQUIREMENTSNET REQUIREMENTS
PLANNED ORDER RECEIPTSPLANNED ORDER RECEIPTS
PLANNED ORDER RELEASESPLANNED ORDER RELEASES
ITEM: 442 MOPED LT: 1 ITEM: 442 MOPED LT: 1 LOT SIZE: LFL SS: 200 LOT SIZE: LFL SS: 200
00
1010
10001000 00
1111 1212 1313
13001300 800800
15151414
1400140012001200
1616
WEEKWEEK
MRP Schedule for #442 Mopeds . . . Completed
GROSS REQUIREMENTSGROSS REQUIREMENTS
SCHEDULED RECEIPTSSCHEDULED RECEIPTS
AVAILABLE (ON-HAND = 500)AVAILABLE (ON-HAND = 500)
NET REQUIREMENTSNET REQUIREMENTS
PLANNED ORDER RECEIPTSPLANNED ORDER RECEIPTS
PLANNED ORDER RELEASESPLANNED ORDER RELEASES
ITEM: 442 MOPED LT: 1 ITEM: 442 MOPED LT: 1 LOT SIZE: LFL SS: 200 LOT SIZE: LFL SS: 200
00
300300
10001000
1010
10001000
10001000
300300
13001300
13001300
00
00
1111 1212 1313
13001300
12001200800800
12001200800800
1400140012001200
13001300
13001300
800800
000000 00
14001400
800800
1515
14001400
1414
1400140012001200
1616
WEEKWEEK
MRP Schedule for Gas Tanks for Weeks 10 - 16, considering that:Gross Requirements come from moped
Planned-Order-ReleasesThere is an On-Hand balance of 600 gas tanks
at the end of week 9There is a Scheduled Receipt for 900 tanks in
week 10 A lot-for-lot rule is used for ordering gas tanksSafety stock of 200 gas tanks is desiredLead time for gas tanks is two weeks
MRP Schedule for Gas Tanks . . . Initially
GROSS REQUIREMENTSGROSS REQUIREMENTS
SCHEDULED RECEIPTSSCHEDULED RECEIPTS
AVAILABLE (ON-HAND = 600)AVAILABLE (ON-HAND = 600)
NET REQUIREMENTSNET REQUIREMENTS
PLANNED ORDER RECEIPTSPLANNED ORDER RECEIPTS
PLANNED ORDER RELEASESPLANNED ORDER RELEASES
ITEM: GAS TANK LT: 2 ITEM: GAS TANK LT: 2 LOT SIZE: LFL SS: 200LOT SIZE: LFL SS: 200
10001000
900900
1010
00 13001300
1111 1212 1313
800800 12001200
15151414
0014001400
1616
WEEKWEEK
MRP Schedule for Gas Tanks . . . Completed
GROSS REQUIREMENTSGROSS REQUIREMENTS
SCHEDULED RECEIPTSSCHEDULED RECEIPTS
AVAILABLE AVAILABLE (ON-HAND = 600) (ON-HAND = 600)
NET REQUIREMENTS NET REQUIREMENTS
PLANNED ORDER RECEIPTSPLANNED ORDER RECEIPTS
PLANNED ORDER RELEASESPLANNED ORDER RELEASES
ITEM: GAS TANK LT: 2 ITEM: GAS TANK LT: 2 LOT SIZE: LFL SS: 200 LOT SIZE: LFL SS: 200
10001000
900900
13001300
10001000
1010
800800
00
12001200
300300
13001300
1111 1212 1313
800800
12001200
14001400
12001200
15151414
0014001400
1616
WEEKWEEK
300300 000000
10001000
10001000 800800
800800
14001400
1400140012001200
00
MRP Schedule for Frames for Weeks 10 - 16, considering that:Gross Requirements come from moped
Planned-Order-ReleasesThere is an On-Hand balance of 600 frames at
the end of week 9There is a Scheduled Receipt for 2000 frames
in week 10The firm uses a Lot Size (multiple) of 2000 for
ordering framesNo safety stock of frames is desiredLead time for frames is 3 weeks
MRP Schedule for Frames . . . Initially
GROSS REQUIREMENTSGROSS REQUIREMENTS
SCHEDULED RECEIPTSSCHEDULED RECEIPTS
AVAILABLE AVAILABLE
NET REQUIREMENTSNET REQUIREMENTS
PLANNED ORDER RECEIPTSPLANNED ORDER RECEIPTS
PLANNED ORDER RELEASESPLANNED ORDER RELEASES
ITEM: FRAME LT: 3 ITEM: FRAME LT: 3 LOT SIZE: 2000 SS: 0LOT SIZE: 2000 SS: 0
10001000
20002000
1010
00 13001300
1111 1212 1313
800800 12001200
15151414
0014001400
1616
WEEKWEEK
600600
MRP Schedule for Frames . . . Completed
GROSS REQUIREMENTSGROSS REQUIREMENTS
SCHEDULED RECEIPTSSCHEDULED RECEIPTS
AVAILABLE (ON-HAND = 600) AVAILABLE (ON-HAND = 600)
NET REQUIREMENTSNET REQUIREMENTS
PLANNED ORDER RECEIPTSPLANNED ORDER RECEIPTS
PLANNED ORDER RELEASESPLANNED ORDER RELEASES
ITEM: FRAME LT: 3 ITEM: FRAME LT: 3 LOT SIZE: 2000 SS: 0 LOT SIZE: 2000 SS: 0
10001000
20002000
26002600
00
20002000
1010
16001600
00
20002000
16001600
13001300
1111 1212 1313
800800
20002000
500500
20002000
300300300300 900900
00
12001200
15151414
0014001400
1616
WEEKWEEK
00 00
15001500
00 11001100
MRP Schedule for Engine Assemblies for Weeks 10 - 16, considering that:Gross Requirements come from moped
Planned-Order-ReleasesThere is an On-Hand balance of 300 engine
assemblies at the end of week 9There is a Scheduled Receipt for 1000 engine
assemblies in week 10The firm uses a Lot Size (multiple) of 500 for
ordering engine assembliesSafety Stock of 100 engine assemblies is
desiredLead time for engine assemblies is 1 week
MRP Schedule for Engine Assemblies . . . Initially
GROSS REQUIREMENTSGROSS REQUIREMENTS
SCHEDULED RECEIPTSSCHEDULED RECEIPTS
AVAILABLE (ON-HAND = 300) AVAILABLE (ON-HAND = 300)
NET REQUIREMENTS NET REQUIREMENTS
PLANNED ORDER RECEIPTSPLANNED ORDER RECEIPTS
PLANNED ORDER RELEASESPLANNED ORDER RELEASES
ITEM: ENGINE ASSEM. LT: 1 ITEM: ENGINE ASSEM. LT: 1 LOT SIZE: 500 SS: 100 LOT SIZE: 500 SS: 100
10001000
10001000
1010
00
13001300
1111 1212 1313
800800 12001200
15151414
0014001400
1616
WEEKWEEK
MRP Schedule for Engine Assemblies . . . Completed
GROSS REQUIREMENTSGROSS REQUIREMENTS
SCHEDULED RECEIPTSSCHEDULED RECEIPTS
AVAILABLE (ON-HAND = 300) AVAILABLE (ON-HAND = 300)
NET REQUIREMENTS NET REQUIREMENTS
PLANNED ORDER RECEIPTSPLANNED ORDER RECEIPTS
PLANNED ORDER RELEASESPLANNED ORDER RELEASES
ITEM: ENGINE ASSEM. LT: 1 ITEM: ENGINE ASSEM. LT: 1 LOT SIZE: 500 SS: 100 LOT SIZE: 500 SS: 100
10001000
10001000
12001200
1010
15001500
200 200
00
500500
15001500
11001100
200200
13001300
1111 1212 1313
800800
1000100011001100
1000100015001500
10001000
400400
500500
15001500
400400100100400400 00
12001200
15151414
0014001400
1616
WEEKWEEK
MRP Schedule for Motors for Weeks 10 - 16, considering that:Gross Requirements come from engine
assembly Planned-Order-ReleasesThere is an On-Hand balance of 250 motors at
the end of week 9There are no Scheduled Receipts for motorsA lot-for-lot rule is used for ordering motorsNo Safety Stock of motors is desiredLead time for motors is 1 week
MRP Schedule for Motors . . . Initially
GROSS REQUIREMENTSGROSS REQUIREMENTS
SCHEDULED RECEIPTS SCHEDULED RECEIPTS
AVAILABLE (ON-HAND = 250) AVAILABLE (ON-HAND = 250)
NET REQUIREMENTSNET REQUIREMENTS
PLANNED ORDER RECEIPTSPLANNED ORDER RECEIPTS
PLANNED ORDER RELEASESPLANNED ORDER RELEASES
ITEM: MOTOR LT: 1 ITEM: MOTOR LT: 1 LOT SIZE: LFL SS: 0 LOT SIZE: LFL SS: 0 1010
15001500
500500
1111 1212 1313
15001500
10001000
15151414 1616
WEEKWEEK
MRP Schedule for Motors . . . Completed
GROSS REQUIREMENTSGROSS REQUIREMENTS
SCHEDULED RECEIPTS SCHEDULED RECEIPTS
AVAILABLE (ON-HAND = 250) AVAILABLE (ON-HAND = 250)
NET REQUIREMENTSNET REQUIREMENTS
PLANNED ORDER RECEIPTSPLANNED ORDER RECEIPTS
PLANNED ORDER RELEASESPLANNED ORDER RELEASES
ITEM: MOTOR LT: 1 ITEM: MOTOR LT: 1 LOT SIZE: LFL SS: 0 LOT SIZE: LFL SS: 0
250250
12501250
1010
12501250
500500
12501250
250250
15001500
15001500
500500
500500
00
500500
1111 1212 1313
15001500
10001000
10001000
15001500
15001500
10001000
000000 00
10001000
15151414 1616
WEEKWEEK
MRP Schedule for Carburetors for Weeks 10 - 16, considering that:Gross Requirements come from engine
assembly Planned-Order-Releases (times 2)There is an On-Hand balance of 150
carburetors at the end of week 9There are no Scheduled Receipts for
carburetorsA Lot Size of 200+ is used for ordering
carburetorsSafety Stock of 100 carburetors is desiredLead time for carburetors is 2 weeks
MRP Schedule for Carburetors . . . Initially
GROSS REQUIREMENTSGROSS REQUIREMENTS
SCHEDULED RECEIPTS SCHEDULED RECEIPTS
AVAILABLE (ON-HAND = 150) AVAILABLE (ON-HAND = 150)
NET REQUIREMENTSNET REQUIREMENTS
PLANNED ORDER RECEIPTSPLANNED ORDER RECEIPTS
PLANNED ORDER RELEASES PLANNED ORDER RELEASES
ITEM: CARBURETOR LT: 2 ITEM: CARBURETOR LT: 2 LOT SIZE: 2000+ SS: 100LOT SIZE: 2000+ SS: 100 1010
30003000 10001000
1111 1212 1313
30003000 20002000
15151414 1616
WEEKWEEK
MRP Schedule for Carburetors . . . Completed
GROSS REQUIREMENTSGROSS REQUIREMENTS
SCHEDULED RECEIPTS SCHEDULED RECEIPTS
AVAILABLE (ON-HAND = 150) AVAILABLE (ON-HAND = 150)
NET REQUIREMENTSNET REQUIREMENTS
PLANNED ORDER RECEIPTSPLANNED ORDER RECEIPTS
PLANNED ORDER RELEASES PLANNED ORDER RELEASES
ITEM: CARBURETOR LT: 2 ITEM: CARBURETOR LT: 2 LOT SIZE: 2500+ SS: 100LOT SIZE: 2500+ SS: 100
5050
25002500
1010
25002500
30503050
30003000
30003000
25002500
25002500
950950
5050
10001000
1111 1212 1313
30003000
950950
25002500
14501450
25002500
155015501050105015501550 15501550
20002000
15151414 1616
WEEKWEEK
MRP Schedule for Wheel Assemblies for Weeks 10 - 16, considering that:Gross Requirements come from moped
Planned-Order-Releases (times 2)There is an On-Hand balance of 500 wheel
assemblies at the end of week 9There is a Scheduled Receipt for 2000 wheel
assemblies in week 10A Lot Size (multiple) of 500 is used for ordering
wheel assembliesSafety Stock of 400 wheel assemblies is
desiredLead time for wheel assemblies is 1 week
MRP Schedule for Wheel Assemblies . . . Initially
GROSS REQUIREMENTSGROSS REQUIREMENTS
SCHEDULED RECEIPTSSCHEDULED RECEIPTS
AVAILABLE (ON-HAND = 500) AVAILABLE (ON-HAND = 500)
NET REQUIREMENTS NET REQUIREMENTS
PLANNED ORDER RECEIPTSPLANNED ORDER RECEIPTS
PLANNED ORDER RELEASESPLANNED ORDER RELEASES
ITEM: WHEEL ASSEM. LT: 1 ITEM: WHEEL ASSEM. LT: 1 LOT SIZE: 500 SS: 400 LOT SIZE: 500 SS: 400
20002000
20002000
1010
00
26002600
1111 1212 1313
16001600 24002400
15151414
0028002800
1616
WEEKWEEK
MRP Schedule for Wheel Assemblies . . . Completed
GROSS REQUIREMENTSGROSS REQUIREMENTS
SCHEDULED RECEIPTSSCHEDULED RECEIPTS
AVAILABLE (ON-HAND = 500) AVAILABLE (ON-HAND = 500)
NET REQUIREMENTS NET REQUIREMENTS
PLANNED ORDER RECEIPTSPLANNED ORDER RECEIPTS
PLANNED ORDER RELEASESPLANNED ORDER RELEASES
ITEM: WHEEL ASSEM. LT: 1 ITEM: WHEEL ASSEM. LT: 1 LOT SIZE: 500 SS: 400 LOT SIZE: 500 SS: 400
20002000
20002000
21002100
1010
25002500
100100
00
20002000
25002500
25002500
100100
26002600
1111 1212 1313
16001600
2800280020002000
3000300020002000
30003000
16001600
20002000
20002000
0040040000 200200
24002400
15151414
0028002800
1616
WEEKWEEK
MRP Schedule for Hub Assemblies for Weeks 10 - 16, considering that:Gross Requirements come from wheel assembly
Planned-Order-ReleasesThere is an On-Hand balance of 100 hub
assemblies at the end of week 9There is a Scheduled Receipt of 2400 hub
assemblies in week 11A lot-for-lot rule is used for ordering hub
assembliesNo Safety Stock of hub assemblies is desiredLead time for hub assemblies is 1 week
MRP Schedule for Hub Assemblies . . . Initially
GROSS REQUIREMENTSGROSS REQUIREMENTS
SCHEDULED RECEIPTSSCHEDULED RECEIPTS
AVAILABLE (ON-HAND = 100) AVAILABLE (ON-HAND = 100)
NET REQUIREMENTS NET REQUIREMENTS
PLANNED ORDER RECEIPTSPLANNED ORDER RECEIPTS
PLANNED ORDER RELEASESPLANNED ORDER RELEASES
ITEM: HUB ASSEM. LT: 1 ITEM: HUB ASSEM. LT: 1 LOT SIZE: LFL SS: 0 LOT SIZE: LFL SS: 0
00
1010
24002400
25002500
20002000
1111 1212 1313
20002000
30003000
15151414
0000
1616
WEEKWEEK
MRP Schedule for Hub Assemblies . . . Completed
GROSS REQUIREMENTSGROSS REQUIREMENTS
SCHEDULED RECEIPTSSCHEDULED RECEIPTS
AVAILABLE (ON-HAND = 100) AVAILABLE (ON-HAND = 100)
NET REQUIREMENTS NET REQUIREMENTS
PLANNED ORDER RECEIPTSPLANNED ORDER RECEIPTS
PLANNED ORDER RELEASESPLANNED ORDER RELEASES
ITEM: HUB ASSEM. LT: 1 ITEM: HUB ASSEM. LT: 1 LOT SIZE: LFL SS: 0 LOT SIZE: LFL SS: 0
00
100100
1010
20002000
25002500
24002400
25002500
20002000
20002000
20002000
00
20002000
1111 1212 1313
20002000
30003000
30003000
20002000
20002000
30003000
000000 00
30003000
15151414
0000
1616
WEEKWEEK
MRP Schedule for Tires for Weeks 10 - 16, considering that:Gross Requirements come from wheel
assembly Planned-Order-ReleasesThere is an On-Hand balance of 500 tires at the
end of week 9There are Scheduled Receipts for 3000 and
2000 tires weeks 11 and 12, respectivelyA Lot Size (multiple) of 1000 is used for
ordering tiresSafety Stock of 500 tires is desiredLead time for tires is 3 weeks
MRP Schedule for Tires . . . Initially
GROSS REQUIREMENTSGROSS REQUIREMENTS
SCHEDULED RECEIPTSSCHEDULED RECEIPTS
AVAILABLE (ON-HAND = 500) AVAILABLE (ON-HAND = 500)
NET REQUIREMENTS NET REQUIREMENTS
PLANNED ORDER RECEIPTSPLANNED ORDER RECEIPTS
PLANNED ORDER RELEASESPLANNED ORDER RELEASES
ITEM: TIRE LT: 3 ITEM: TIRE LT: 3 LOT SIZE: 1000 SS: 500 LOT SIZE: 1000 SS: 500
00
1010
30003000
25002500 20002000
20002000
1111 1212 1313
20002000
30003000
15151414
0000
1616
WEEKWEEK
MRP Schedule for Tires . . . Completed
GROSS REQUIREMENTSGROSS REQUIREMENTS
SCHEDULED RECEIPTSSCHEDULED RECEIPTS
AVAILABLE (ON-HAND = 500) AVAILABLE (ON-HAND = 500)
NET REQUIREMENTS NET REQUIREMENTS
PLANNED ORDER RECEIPTSPLANNED ORDER RECEIPTS
PLANNED ORDER RELEASESPLANNED ORDER RELEASES
ITEM: TIRE LT: 3 ITEM: TIRE LT: 3 LOT SIZE: 1000 SS: 500 LOT SIZE: 1000 SS: 500
00
0 0
20002000
1010
30003000
30003000
30003000
25002500
25002500
20002000
20002000
1111 1212 1313
20002000
25002500
30003000
15001500
20002000
500500 500500500 500 500 500
30003000
15151414
0000
1616
WEEKWEEK