CN109711778B - Inventory allocation method, device and storage medium of warehouse network - Google Patents
Inventory allocation method, device and storage medium of warehouse network Download PDFInfo
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Abstract
The invention discloses a warehouse allocation method, a device and a storage medium of a warehouse network. The method comprises the following steps: calculating a safety stock of the commodity; determining a short-term allocation quantity of the commodity to a pre-warehouse by a central warehouse group based on an initial inventory of the commodity and a short-term safety inventory, wherein the short-term includes the current day and two days; an allocation plan is generated, the allocation plan including the type and quantity of goods to be allocated. The invention avoids the problems that partial goods in the front warehouse are backlogged and partial goods in the front warehouse are out of stock due to the uncertainty of daily demand of goods and the quantity of the goods transferred to the front warehouse by the central warehouse group is insufficient or the quantity of the transferred goods is excessive, and reduces the operation cost.
Description
Technical Field
The embodiment of the invention relates to the field of computers, in particular to a method, a device and a storage medium for inventory allocation of a warehouse network.
Background
In modern life, electronic commerce is playing an increasingly important role. The ever-increasing customer demand and cost pressure also present greater challenges to the operation of electronic commerce, where innovations in supply chain and warehouse logistics management play a central role in large electronic commerce operations.
In order to improve distribution timeliness and optimize customer shopping experience, large electronic commerce operators often adopt a secondary inventory structure to enable the stock positions of commodities to be closer to customers. In the two-level inventory structure, the upper level is a regional distribution center warehouse group (Regional Distribution Center, RDC), and the lower level is a plurality of pre-warehouse (Front Distribution Center, FDC) built around the upper level RDC. RDCs have both the ability to deliver to their associated cities and the ability to allocate goods to FDCs that are primarily responsible for delivering to their associated cities. The merchant's supply to the carrier is first replenished to the RDC and then the RDC is mobilized to the FDC, and the mobilization decision from the RDC to the FDC determines the distribution of inventory between the RDC and the FDC.
In the prior art, it is common for each FDC to actively request replenishment from the RDC according to its own inventory condition, and the RDC allocates inventory for each FDC according to the replenishment request of each FDC. Because the RDC cannot know the inventory condition of all the sub-warehouses in real time, and the daily commodity requirement of the city associated with the RDC and the FDC is a random variable, the inventory allocation method easily generates the situation that the RDC allocates too much inventory for part of the FDCs or allocates too little inventory for part of the FDCs, thereby causing the problems of backlog of part of the FDCs and backlog of part of the FDCs.
If the FDC is fully stocked, the delivery rate from the FDC directly to the customer is the fastest and the cost is the lowest. If the RDC is not sufficient to allocate items to the FDC, then once the FDC is out of stock, customer requirements will be fulfilled from the RDC, which may add two additional operating costs: additional performance costs and order cancellation costs. Conversely, if the RDC transfers too much cargo to one FDC, the RDC may not be in sufficient inventory itself and may not be available for other FDCs, which may also increase the operation cost.
Disclosure of Invention
The invention provides a warehouse allocation method, a device and a storage medium of a warehouse network, which are used for reducing the operation cost.
In a first aspect, an embodiment of the present invention provides a method for allocating inventory of a warehouse network, including:
calculating a safety stock of the commodity;
determining a short-term allocation quantity of commodities to a pre-warehouse by a central warehouse group based on an initial inventory of the commodities and a short-term safety inventory, wherein the short-term includes the current day and two days;
generating an allocation plan, wherein the allocation plan comprises the types and the amounts of commodities to be allocated.
Optionally, calculating a safety stock of the commodity includes:
calculating a safety stock according to the expected value and standard deviation of daily demand of commodities, wherein the calculation formula is as follows:
wherein n is the number of days, is an integer greater than or equal to 1, i is the warehouse number, j is the commercial variety class number, r is a constant, V ij Safety stock for goods j in warehouse i for n days, E ij Daily demand for warehouse i for commodity jExpected value of sigma of ij For the standard deviation of daily demand of warehouse i for commodity j, i is a natural number, and i equals 0 to represent the central warehouse group.
Optionally, before calculating the safety stock of the commodity, the method further comprises:
acquiring historical data of daily demand of commodities;
based on historical data of daily demand of the commodity, expected values and standard deviations of daily demand of the commodity are calculated.
Optionally, generating the dial plan includes:
judging whether the type of the transferred commodity exceeds the commodity type limit of the front warehouse; if so, the first and second data are not identical,
acquiring first cost of each commodity, wherein the first cost is additional performance cost and order cancellation cost caused by the lack of the commodity in the front-end warehouse;
and selecting the types of the commodities to be allocated according to the first cost from high to low so as to meet the commodity type limitation of the front warehouse.
Optionally, generating the dial plan further includes:
after the types of the goods to be transferred are selected from high to low according to the first cost so as to meet the goods type limit of the front-end warehouse, judging whether the total amount of the transferred goods exceeds the total amount limit of the goods of the front-end warehouse; if so, the first and second data are not identical,
acquiring second cost of each commodity, wherein the second cost is order cancellation cost caused by the lack of the commodity in the front warehouse;
and selecting the quantity of the commodities to be allocated according to the second cost from high to low so as to meet the commodity total quantity limit of the front warehouse.
Optionally, before generating the allocation plan, the method further includes:
if the type of the transferred commodity does not exceed the commodity type limit of the front-end warehouse and/or the total amount of the transferred commodity does not exceed the commodity total amount limit of the front-end warehouse, determining additional inventory within two days of the central warehouse group and the long-term transfer amount of the commodity transferred to the front-end warehouse by the central warehouse group based on the initial inventory and the long-term safety inventory of the commodity; long term includes greater than two days;
generating the dial plan further includes:
according to the quantity of the commodities to be allocated which is selected from high to low according to the second cost, the long-term allocation quantity of the commodities is met on the premise that the quantity of the commodities does not exceed the extra stock in two days of the central warehouse group.
In a second aspect, an embodiment of the present invention further provides an inventory allocation device of a warehouse network, including:
the first calculation module is used for calculating the safety stock of the commodity;
the first allocation quantity determining module is used for calculating the short-term allocation quantity of the commodities to the front warehouse by the central warehouse group based on the initial inventory of the commodities and the short-term safety inventory, wherein the short-term includes the current day and the two days;
the allocation plan generation module is used for generating an allocation plan, and the allocation plan comprises the types and the amounts of commodities to be allocated.
Optionally, the allocation plan generating module includes:
the first judging unit is used for judging whether the transferred commodity type exceeds the commodity type limit of the front warehouse;
the first cost acquisition unit is used for acquiring the first cost of each commodity when the allocated commodity type exceeds the commodity type limit of the front-end warehouse, wherein the first cost is the additional performance cost and the order cancellation cost caused by the lack of the commodity in the front-end warehouse;
the first selecting unit is used for selecting the types of the commodities to be allocated according to the first cost from high to low so as to meet the commodity type limitation of the front warehouse.
Optionally, the allocation plan generating module further includes:
the second judging unit is used for judging whether the total amount of the transferred commodities exceeds the commodity total amount limit of the front warehouse after selecting the types of the commodities to be transferred from high to low according to the first cost so as to meet the commodity type limit of the front warehouse;
the second cost acquisition unit is used for acquiring the second cost of each commodity when the total amount of the transferred commodities exceeds the commodity total amount limit of the front-end warehouse, wherein the second cost is the order canceling cost caused by the fact that the front-end warehouse lacks the commodity;
the second selecting unit is used for selecting the quantity of the commodities to be allocated according to the second cost from high to low so as to meet the commodity total quantity limit of the front warehouse.
Optionally, the inventory allocation device of the warehouse network further includes:
the second allocation quantity determining module is used for determining extra stock in two days of the central warehouse group based on the initial stock and the long-term safety stock of the commodity when determining that the total amount of the allocated commodity does not exceed the commodity total amount limit of the front warehouse before generating an allocation plan; and determining the long-term allocation quantity of the commodities allocated to the front warehouse by the central warehouse group; wherein long term includes greater than two days;
the allocation plan generating module is also used for selecting the quantity of the commodities to be allocated from high to low according to the second cost, and meeting the long-term allocation quantity of the commodities on the premise of not exceeding the extra stock in two days of the central warehouse group.
In a third aspect, an embodiment of the present invention further provides a computer readable storage medium, where a computer program is stored, where the program when executed by a processor implements a method for inventory allocation of a warehouse network according to the first aspect of the present invention.
According to the embodiment of the invention, the short-term allocation quantity of the commodities to the front-end warehouse is determined based on the initial inventory and the short-term safety inventory of the commodities, and the allocation plan is generated based on the short-term allocation quantity of the commodities, so that the situation that the operation cost is increased and the operation cost is reduced due to insufficient or excessive allocation quantity of the commodities to the front-end warehouse is avoided.
Drawings
Fig. 1 is a flowchart of a method for allocating inventory of a warehouse network according to an embodiment of the present invention;
fig. 2 is a flowchart of another inventory allocation method of a warehouse network according to an embodiment of the present invention;
fig. 3 is a flowchart of another inventory allocation method of a warehouse network according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an inventory allocation device of a warehouse network according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an allocation plan generating module according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
The embodiment of the invention provides a method for allocating inventory of a storage network, and fig. 1 is a flowchart of the method for allocating inventory of the storage network, as shown in fig. 1, and the method specifically comprises the following steps:
s110, calculating the safety stock of the commodity.
A safety stock of each commodity is calculated, wherein the safety stock is the demand of the commodity in a future period of time in the city or area associated with the front-end warehouse. Specifically, the safety stock of each commodity in the future synchronization can be calculated based on the daily demand of the commodity in the city or area associated with the pre-warehouse in the history synchronization. Specifically, a safety stock is calculated for each commodity for a short period, wherein the short period includes the current day and two days.
S120, determining short-term allocation quantity of the commodities to be allocated to the front warehouse by the central warehouse group based on the initial inventory of the commodities and the short-term safety inventory.
The initial inventory of the commodity is the inventory of the commodity in the front warehouse after the previous day of inventory, and the short-term allocation quantity of the commodity allocated to the front warehouse by the central warehouse group is determined based on the initial inventory of the commodity and the short-term safety inventory. Specifically, the amount of the commodity allocated on the same day is the safety stock of the commodity on the same day minus the initial stock of the commodity, and the amount of the commodity allocated on two days is the safety stock of the commodity on two days minus the initial stock of the commodity. Because the short-term allocation quantity of the commodities allocated to the front-end warehouse by the central warehouse group is based on the initial inventory and the short-term safety inventory of the commodities, the problems that partial front-end warehouse goods are backlogged and partial front-end warehouse is out of stock due to the fact that the quantity of the commodities allocated to the front-end warehouse is insufficient or the quantity of the commodities allocated to the front-end warehouse is excessive due to the uncertainty of daily demand quantity of the commodities are avoided, and the operation cost is reduced.
S130, generating an allocation plan, wherein the allocation plan comprises the types and the amounts of commodities to be allocated.
The allocation plan may include an allocation table, where the allocation table may include a commodity category column and a corresponding quantity column, where the commodity category column includes a category of the commodity to be allocated, and the quantity column includes a corresponding quantity of the commodity to be allocated, and a header of the allocation table may include information of a pre-warehouse to which the commodity is to be forwarded. After the allocation plan is generated, the allocation plan is sent to a logistics transportation system, and the logistics transportation system allocates the commodities to be allocated to the corresponding front-end warehouse according to the allocation plan.
According to the inventory allocation method of the warehouse network, provided by the embodiment of the invention, the short-term allocation quantity of the commodities to the front warehouse is determined based on the initial inventory and the short-term safety inventory of the commodities, and the allocation plan is generated based on the short-term allocation quantity of the commodities, so that the problems that the goods backlog of part of the front warehouse is caused and part of the front warehouse is out of stock due to insufficient quantity of the commodities to be allocated to the front warehouse or excessive quantity of the commodities to be allocated due to uncertainty of daily demand quantity of the commodities are avoided, and the operation cost is reduced.
Optionally, in the above embodiment, calculating the safety stock of the commodity includes:
calculating a safety stock according to the expected value and standard deviation of daily demand of commodities, wherein the calculation formula is as follows:
wherein n is the number of days, is an integer greater than or equal to 1, i is the warehouse number, j is the commodity class number, and r isConstant, V ij Safety stock for goods j in warehouse i for n days, E ij For the expected value of daily demand of warehouse i for commodity j, σ ij For the standard deviation of daily demand of warehouse i for commodity j, i is a natural number, and i equals 0 to represent the central warehouse group. Based on the above calculation formula, the demand of the city or the area associated with the pre-warehouse of a pre-warehouse in any future period for the commodity, namely the safety stock, including short-term and long-term safety stock, can be calculated.
Optionally, before calculating the safety stock of the commodity, the method further comprises:
historical data of daily demand of the commodity is obtained.
The daily demand for such items is obtained for cities or areas associated with the pre-warehouse during the same period of history, and for example, if the safety stock of a commodity needs to be calculated for two future days (20 and 21 days of 12 months of 2018, and 20 days of the same day), the daily demand for such commodity needs to be obtained for cities or areas associated with the pre-warehouse for the last few years (e.g., 5 years) of 12 months of 20 days and 21 days.
Based on historical data of daily demand of the commodity, expected values and standard deviations of daily demand of the commodity are calculated.
Illustratively, the acquired historical data of daily demand of the commodity is processed, and the expected value and standard deviation of the daily demand of the commodity are calculated.
Optionally, generating the dial plan includes:
judging whether the type of the transferred commodity exceeds the commodity type limit of the front warehouse; if so, the first and second data are not identical,
acquiring first cost of each commodity, wherein the first cost is additional performance cost and order cancellation cost caused by the lack of the commodity in the front-end warehouse;
and selecting the types of the commodities to be allocated according to the first cost from high to low so as to meet the commodity type limitation of the front warehouse.
Correspondingly, the embodiment of the invention provides another inventory allocation method of a warehouse network, and fig. 2 is a schematic diagram of another inventory allocation method of a warehouse network, as shown in fig. 2, where the method includes:
s210, calculating the safety stock of the commodity.
S220, determining short-term allocation quantity of the commodities to be allocated to the front warehouse by the central warehouse group based on the initial inventory of the commodities and the short-term safety inventory.
S231, judging whether the transferred commodity type exceeds the commodity type limit of the front warehouse.
The types of goods that can be held by the front-end warehouse are limited, and after the central warehouse group transfers goods to the front-end warehouse, the goods types of the front-end warehouse may exceed the holding range, so that it is required to extract and judge whether the transferred goods types exceed the goods types limit of the front-end warehouse, specifically, whether the sum of the types of goods to be transferred and the initially stored goods types of the front-end warehouse exceeds the goods types limit of the front-end warehouse or not can be judged.
S232, if yes, acquiring the first cost of each commodity.
If the sum of the types of the commodities to be allocated and the types of the commodities in the initial inventory of the front-end warehouse exceeds the commodity type limit of the front-end warehouse, the types of the commodities to be allocated should be corrected to meet the commodity type limit of the front-end warehouse, and meanwhile, the operation cost is reduced as much as possible under the condition of meeting the commodity type limit of the front-end warehouse. Specifically, the first cost of each commodity can be calculated according to the historical data, wherein the first cost is the additional performance cost and the order cancellation cost caused by the lack of the commodity in the front warehouse.
S233, selecting the types of the commodities to be allocated according to the first cost from high to low so as to meet the commodity type limitation of the front warehouse.
Sorting the types of the commodities to be allocated according to the first cost from high to low, and preferentially selecting the commodities with higher first cost to meet the commodity type limitation of the front warehouse. Namely, under the condition of meeting the commodity type limitation of the front-end warehouse, commodities with higher first cost due to the shortage of the commodities are selected as much as possible, so that the operation cost is reduced.
Optionally, generating the dial plan further includes:
after the types of the goods to be transferred are selected from high to low according to the first cost so as to meet the goods type limit of the front-end warehouse, judging whether the total amount of the transferred goods exceeds the total amount limit of the goods of the front-end warehouse; if so, the first and second data are not identical,
acquiring second cost of each commodity, wherein the second cost is order cancellation cost caused by the lack of the commodity in the front warehouse;
and selecting the quantity of the commodities to be allocated according to the second cost from high to low so as to meet the commodity total quantity limit of the front warehouse.
Correspondingly, the embodiment of the invention provides another inventory allocation method of a warehouse network, and fig. 3 is another inventory allocation method of a warehouse network provided by the embodiment of the invention, as shown in fig. 3, the method includes:
s310, calculating the safety stock of the commodity.
S320, determining short-term allocation quantity of the commodities to be allocated to the front warehouse by the central warehouse group based on the initial inventory of the commodities and the short-term safety inventory.
S331, judging whether the transferred commodity type exceeds the commodity type limit of the front warehouse.
And S332, if yes, acquiring the first cost of each commodity.
The first cost is the additional performance cost and order cancellation cost incurred by the lack of such merchandise in the pre-warehouse.
S333, selecting the types of the commodities to be allocated according to the first cost from high to low so as to meet the commodity type limitation of the front warehouse.
S341, judging whether the total amount of the transferred commodities exceeds the commodity total amount limit of the front warehouse.
The total amount of goods that can be held by the front-end warehouse is limited, when the central warehouse group transfers goods to the front-end warehouse, after the goods category limit of the front-end warehouse is met, the total amount of goods of the front-end warehouse exceeds the holding range of the front-end warehouse possibly, so that extraction is needed to judge whether the transferred total amount of goods exceeds the total amount of goods limit of the front-end warehouse. Specifically, under the condition that the commodity type limit of the pre-warehouse is met, the commodity type limit of the pre-warehouse can be judged according to whether the sum of the total amount of the commodities to be transferred and the total amount of the commodities in the initial inventory of the pre-warehouse exceeds the commodity type limit of the pre-warehouse.
And S342, if yes, acquiring the second cost of each commodity.
If the sum of the total amount of the goods to be transferred and the total amount of the goods in the initial inventory of the front-end warehouse exceeds the total amount of the goods in the front-end warehouse on the premise of meeting the limitation of the types of the goods in the front-end warehouse, the total amount of the goods to be transferred should be corrected to meet the limitation of the total amount of the goods in the front-end warehouse, and meanwhile, the operation cost is reduced as much as possible under the condition of meeting the limitation of the types of the goods in the front-end warehouse and the total amount. Specifically, the second cost of each commodity can be calculated according to the historical data, and the second cost is the order cancellation cost caused by the lack of the commodity in the front warehouse.
S343, selecting the quantity of the commodities to be allocated according to the second cost from high to low so as to meet the commodity total quantity limit of the front warehouse.
Based on step S333, the types of the commodities to be allocated are sorted from high to low according to the second cost, and the commodities with higher second cost are preferentially selected to meet the commodity total amount limitation of the front warehouse. Namely, under the condition of meeting the total quantity limitation of commodities in the front warehouse, the commodities with higher second cost caused by the shortage of the commodities are selected as much as possible, so that the operation cost is reduced. For example, in step S333, it is determined that 500 pieces of a commodity, 250 pieces of B commodity and 330 pieces of C commodity are allocated to a pre-warehouse, the total amount of the commodity in the pre-warehouse is limited to 1000 pieces, and the second costs of the three commodities A, B and C are sequentially reduced, so that 500 pieces of a commodity, 250 pieces of B commodity and 250 pieces of C commodity can be selected, and those commodities with higher second costs due to backorder are selected as much as possible under the condition that the total amount of the commodity in the pre-warehouse is limited, thereby reducing the operation cost.
The above steps S310 to S343 may be referred to as a first round of decision process for satisfying the short-term demand of such goods for the city or area associated with the pre-warehouse.
Optionally, in order to meet the long-term demand of the city or the area associated with the pre-warehouse for such commodities, the warehouse network inventory allocation method provided by the embodiment of the invention further includes a second round of decision-making process, specifically, before generating the allocation plan, the method further includes:
if the type of the transferred commodity is determined not to exceed the commodity total amount limit of the front-end warehouse, determining additional inventory within two days of the central warehouse group based on the initial inventory and the long-term safety inventory of the commodity, and transferring the long-term transfer quantity of the commodity to the front-end warehouse by the central warehouse group. Specifically, the total amount of the commodities in the pre-warehouse does not exceed the limit of the commodity, so that the pre-warehouse can be supplemented with the commodity, and further dispatching of the commodity to the pre-warehouse can be considered at this time, so as to meet the long-term demand of the commodity in the city or area associated with the pre-warehouse. The additional inventory within two days of the central warehouse is equal to the difference between the initial inventory of the central warehouse and the safety inventory within two days of the central warehouse, and the long-term allocation quantity of the central warehouse to the front warehouse is equal to the difference between the long-term safety inventory of the front warehouse and the initial inventory of the front warehouse, wherein the long-term includes more than two days.
Generating the dial plan further includes:
according to the quantity of the commodities to be allocated which is selected from high to low according to the second cost, the long-term allocation quantity of the commodities is met on the premise that the quantity of the commodities does not exceed the extra stock in two days of the central warehouse group.
Further dispatching of the goods to the pre-warehouse may improve its long-term supply, but may also result in reduced inventory of the corresponding goods in the central warehouse. Because the central warehouse group also has the function of directly performing the order form to the clients, the central warehouse group also needs to have a certain inventory. In summary, the commodity inventory of the central warehouse group is required to be always not lower than the safety inventory standard in two days of the central warehouse group, so that the additional inventory in two days of Yu Zhongxin warehouse groups is set to be further allocated to the front warehouse. Specifically, in order to reduce the operation cost as much as possible, the types of the commodities to be allocated are ordered from high to low according to the second cost, and on the premise that the total commodity amount limit of the front warehouse and the extra inventory in two days of the central warehouse group are not exceeded, the commodities with higher second cost are preferentially selected, so that the long-term allocation quantity of the commodities is met.
Specifically, we performed a simulation test on a warehouse network containing 1000 commodities, 6 warehouses (1 center warehouse group, 5 front warehouses), with a simulation test period of 1 month, and calculated the final total operating cost. Meanwhile, we also tested the following comparative method: 1) Method A: the greedy method is that the commodity with the highest benefit is always selected to be allocated preferentially; 2) Method B: only the first round of decisions is included; 3) Method C: comprising a first round of decisions and a second round of decisions; the simulation time of all methods is limited to two hours.
The following table shows the operation cost obtained by each method, and as shown in the following table, the inventory allocation method of the warehouse network provided by the embodiment of the invention can reduce the operation cost, wherein the operation cost of the inventory allocation method of the warehouse network adopting two rounds of decisions is the lowest.
| Method A | Method B | Method C | |
| Operation cost (Yuan) | 8645 | 5901 | 4821 |
The embodiment of the invention also provides an inventory allocation device of a warehouse network, which is used for executing the inventory allocation method of the warehouse network according to the embodiment of the invention, and fig. 4 is a schematic structural diagram of the inventory allocation device of the warehouse network, as shown in fig. 4, and the device comprises a first calculation module 100, a first allocation quantity determination module 200 and an allocation plan generation module 300.
The first calculation module 100 is used for calculating a safety stock of goods. The safety stock is the demand of the city or area associated with the front-end warehouse for the commodity in a certain period in the future. Specifically, the safety stock of each commodity in the future synchronization can be calculated based on the daily demand of the commodity in the city or area associated with the pre-warehouse in the history synchronization. Specifically, the safety stock is calculated according to the expected value and standard deviation of daily demand of the commodity, and the calculation formula is as follows:
wherein n is the number of days, is an integer greater than or equal to 1, i is the warehouse number, j is the commercial variety class number, r is a constant, V ij Safety stock for goods j in warehouse i for n days, E ij For the expected value of daily demand of warehouse i for commodity j, σ ij For the standard deviation of daily demand of warehouse i for commodity j, i is a natural number, and i equals 0 to represent the central warehouse group. Based on the above calculation formula, the demand of the city or the area associated with the pre-warehouse of a pre-warehouse in any future period for the commodity, namely the safety stock, including short-term and long-term safety stock, can be calculated. The first calculation module 100 may process the obtained historical data of daily demand of the commodity, and calculate the expected value and standard deviation of the daily demand of the commodity.
The first allocation quantity determining module 200 is configured to calculate a short-term allocation quantity of the commodity to the pre-warehouse by the central warehouse group based on the initial inventory of the commodity and the short-term safety inventory calculated by the first calculating module 100, wherein the short-term includes the current day and two days. The initial inventory of the commodity is the inventory of the commodity in the front warehouse after the inventory of the commodity is checked on the previous day, the allocation quantity of the commodity on the current day is the safety inventory of the commodity on the current day minus the initial inventory of the commodity, and the allocation quantity of the commodity on the two days is the safety inventory of the commodity on the two days minus the initial inventory of the commodity.
The allocation plan generating module 300 is configured to generate an allocation plan based on the short-term allocation quantity of the commodity allocated to the front warehouse by the central warehouse group calculated by the first allocation quantity determining module 200, where the allocation plan includes the type and quantity of the commodity to be allocated. After generating the allocation plan, the allocation plan generation module 300 transmits the allocation plan to the logistics transportation system, and the logistics transportation system allocates the goods to be allocated to the corresponding pre-warehouse according to the allocation plan.
According to the inventory allocation device of the warehouse network, the first allocation quantity determining module determines the short-term allocation quantity of the commodities allocated to the front warehouse by the central warehouse group based on the initial inventory and the short-term safety inventory of the commodities, and the allocation plan generating module generates an allocation plan based on the short-term allocation quantity of the commodities, so that the problems that the goods backlog of part of the front warehouse is caused and part of the front warehouse is lacked due to the fact that the quantity of the commodities allocated to the front warehouse is insufficient or the quantity of the commodities allocated to the front warehouse is excessive due to the uncertainty of daily demand of the commodities are avoided, and the operation cost is reduced.
Fig. 5 is a schematic structural diagram of an allocation plan generating module according to an embodiment of the present invention, and optionally, as shown in fig. 5, the allocation plan generating module includes a first judging unit 310, a first cost obtaining unit 320, and a first selecting unit 330.
The first judging unit 310 is configured to judge whether the type of the transferred commodity exceeds the commodity type limit of the pre-warehouse based on the short-term transfer number calculated by the first transfer number determining module 200. Specifically, the judgment can be made according to whether the sum of the types of the goods to be transferred and the types of the goods in the initial inventory of the pre-warehouse exceeds the limitation of the types of the goods in the pre-warehouse.
The first cost obtaining unit 320 is configured to obtain, when the first judging unit 310 determines that the transferred commodity type exceeds the commodity type limit of the pre-warehouse, a first cost of each commodity, where the first cost is an additional performance cost and an order cancellation cost caused by the lack of the commodity in the pre-warehouse.
The first selecting unit 330 is configured to select the type of the commodity to be transferred from high to low according to the first cost acquired by the first cost acquiring unit 320, so as to satisfy the commodity type limitation of the pre-warehouse. Specifically, the types of the commodities to be allocated are ordered from high to low according to the first cost, and the commodities with higher first cost are preferentially selected so as to meet the commodity type limitation of the front warehouse. Namely, under the condition of meeting the commodity type limitation of the front-end warehouse, commodities with higher first cost due to the shortage of the commodities are selected as much as possible, so that the operation cost is reduced.
Optionally, the dial plan generating module further includes a second judging unit 340, a second cost acquiring unit 350, and a second selecting unit 360.
The second determining unit 340 is configured to determine whether the total amount of the transferred commodity exceeds the total amount of the commodity in the pre-warehouse after the first selecting unit 330 selects the type of the commodity to be transferred according to the first cost from high to low so as to meet the commodity type limitation of the pre-warehouse. Specifically, under the condition that the commodity type limit of the pre-warehouse is met, the commodity type limit of the pre-warehouse can be judged according to whether the sum of the total amount of the commodities to be transferred and the total amount of the commodities in the initial inventory of the pre-warehouse exceeds the commodity type limit of the pre-warehouse.
The second cost acquiring unit 350 is configured to acquire a second cost of each commodity when the second judging unit 340 determines that the total amount of the transferred commodity exceeds the commodity total amount limit of the pre-warehouse, where the second cost is an order canceling cost caused by the lack of the commodity in the pre-warehouse.
The second selecting unit 360 is configured to select the number of goods to be allocated according to the second cost from high to low, so as to meet the total quantity limitation of goods in the pre-warehouse. Based on the types of the commodities selected by the first selection unit 330, the types of the commodities to be allocated are ordered according to the second cost from high to low, and the commodities with higher second cost are preferentially selected so as to meet the commodity total amount limitation of the front warehouse.
Optionally, as shown in fig. 4, the inventory allocation device of the warehouse network further includes a second allocation quantity determining module 400, configured to determine, before the allocation plan generating module 300 generates the allocation plan, an additional inventory within two days of the central warehouse group based on the initial inventory and the long-term safety inventory of the commodity when the second judging unit 340 determines that the total amount of the allocated commodity does not exceed the total amount limit of the commodity in the pre-warehouse; and determining the long-term allocation quantity of the commodities allocated to the front warehouse by the central warehouse group; wherein the long term comprises greater than two days. Specifically, the total amount of the commodities in the pre-warehouse does not exceed the limit of the commodity, so that the pre-warehouse can be supplemented with the commodity, and further dispatching of the commodity to the pre-warehouse can be considered at this time, so as to meet the long-term demand of the commodity in the city or area associated with the pre-warehouse. The additional stock in two days of the central warehouse group is equal to the difference between the initial stock of the central warehouse group and the safety stock in two days of the central warehouse group, and the long-term allocation quantity of the commodities allocated to the front warehouse by the central warehouse group is equal to the difference between the long-term safety stock of the front warehouse and the initial stock of the front warehouse.
The second selecting unit 350 in the allocation plan generating module 300 is further configured to select, according to the second cost, the number of goods to be allocated from high to low, and satisfy the long-term allocation number of the goods without exceeding the extra inventory within two days of the central warehouse group. Specifically, further dispatching of the goods to the pre-warehouse may improve its long-term supply, but may also result in reduced inventory of the corresponding goods in the central warehouse. Because the central warehouse group also has the function of directly performing the order form to the clients, the central warehouse group also needs to have a certain inventory. In summary, the commodity inventory of the central warehouse group is required to be always not lower than the safety inventory standard in two days of the central warehouse group, so that the additional inventory in two days of Yu Zhongxin warehouse groups is set to be further allocated to the front warehouse. Specifically, in order to reduce the operation cost as much as possible, the types of the commodities to be allocated are ordered from high to low according to the second cost, and on the premise that the total commodity amount limit of the front warehouse and the extra inventory in two days of the central warehouse group are not exceeded, the commodities with higher second cost are preferentially selected, so that the long-term allocation quantity of the commodities is met.
The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, which when being executed by a processor, implements the inventory allocation method of the warehouse network according to the above embodiment of the invention.
Of course, the computer-readable storage medium provided in the embodiments of the present invention is not limited to the above-described method operations, and may also perform the related operations in the inventory allocation method of the warehouse network provided in any of the embodiments of the present invention.
From the above description of embodiments, it will be clear to a person skilled in the art that the present invention may be implemented by means of software and necessary general purpose hardware, but of course also by means of hardware, although in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, etc., and include several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments of the present invention.
It should be noted that, in the embodiment of the inventory allocation device of the warehouse network, each included module and unit are only divided according to the functional logic, but not limited to the above-mentioned division, so long as the corresponding functions can be realized; in addition, the specific names of the functional modules are only for distinguishing from each other, and are not used for limiting the protection scope of the present invention.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (7)
1. A method for inventory allocation of a warehouse network, comprising:
calculating a safety stock of the commodity;
determining a short-term allocation quantity of the commodity to a pre-warehouse by a central warehouse group based on an initial inventory of the commodity and a short-term safety inventory, wherein the short-term includes the current day and two days;
generating an allocation plan, wherein the allocation plan comprises the types and the numbers of commodities to be allocated;
the generating an allocation plan includes:
judging whether the transferred commodity type exceeds the commodity type limit of the front warehouse; if so, the first and second data are not identical,
acquiring first cost of each commodity, wherein the first cost is additional performance cost and order cancellation cost caused by the lack of the commodity in the front-end warehouse;
selecting the types of goods to be allocated according to the first cost from high to low so as to meet the goods type limitation of the front warehouse;
the generating an allocation plan further includes:
after the types of the commodities to be transferred are selected from high to low according to the first cost so as to meet the commodity type limit of the front-end warehouse, judging whether the total amount of the transferred commodities exceeds the commodity total amount limit of the front-end warehouse; if so, the first and second data are not identical,
acquiring a second cost of each commodity, wherein the second cost is order cancellation cost caused by the lack of the commodity in the front-end warehouse;
and selecting the quantity of the commodities to be allocated from high to low according to the second cost so as to meet the commodity total quantity limit of the front warehouse.
2. The method of inventory allocation for a warehouse network of claim 1, wherein said calculating a safe inventory of goods comprises:
calculating the safety stock according to the expected value and standard deviation of the daily demand of the commodity, wherein the calculation formula is as follows:
wherein n is the number of days, is an integer greater than or equal to 1, i is the warehouse number, j is the commercial variety class number, r is a constant, V ij Safety stock for goods j in warehouse i for n days, E ij For the expected value of daily demand of warehouse i for commodity j, σ ij For the standard deviation of daily demand of warehouse i for commodity j, i is a natural number, and i equals 0 to represent the central warehouse group.
3. The method of inventory allocation for a warehouse network of claim 2, further comprising, prior to said calculating the safety inventory of the commodity:
acquiring historical data of daily demand of the commodity;
based on the historical data of daily demand of the commodity, expected values and standard deviations of daily demand of the commodity are calculated.
4. The method of inventory allocation for a warehouse network of claim 1, further comprising, prior to said generating an allocation plan:
if the total amount of the transferred commodities is determined not to exceed the commodity total amount limit of the front warehouse, determining additional inventory within two days of the central warehouse group based on the initial inventory and the long-term safety inventory of the commodities, and transferring the long-term transfer amount of the commodities to the front warehouse by the central warehouse group; the long term includes greater than two days;
the generating an allocation plan further includes:
and selecting the quantity of the commodities to be allocated from high to low according to the second cost, and meeting the long-term allocation quantity of the commodities on the premise of not exceeding the extra stock in two days of the central warehouse group.
5. An inventory allocation device for a warehouse network, comprising:
the first calculation module is used for calculating the safety stock of the commodity;
a first allocation quantity determining module for calculating a short-term allocation quantity of the commodity to a pre-warehouse by a central warehouse group based on an initial inventory of the commodity and a short-term safety inventory, wherein the short-term includes a current day and two days;
the system comprises a transfer plan generation module, a transfer plan generation module and a transfer module, wherein the transfer plan generation module is used for generating a transfer plan, and the transfer plan comprises the types and the numbers of commodities to be transferred;
the allocation plan generation module includes:
a first judging unit for judging whether the transferred commodity type exceeds the commodity type limit of the front warehouse;
the first cost acquisition unit is used for acquiring first cost of each commodity when the allocated commodity type exceeds the commodity type limit of the pre-warehouse, wherein the first cost is additional performance cost and order cancellation cost caused by the lack of the commodity in the pre-warehouse;
the first selecting unit is used for selecting the types of the commodities to be allocated from high to low according to the first cost so as to meet the commodity type limitation of the front warehouse;
the schedule generation module further includes:
the second judging unit is used for judging whether the total amount of the transferred commodities exceeds the total amount limit of the commodities in the front warehouse after the types of the commodities to be transferred are selected from high to low according to the first cost so as to meet the commodity type limit of the front warehouse;
the second cost acquisition unit is used for acquiring second cost of each commodity when the total amount of the transferred commodities exceeds the commodity total amount limit of the pre-warehouse, wherein the second cost is order cancellation cost caused by the fact that the pre-warehouse lacks the commodity;
and the second selecting unit is used for selecting the quantity of the commodities to be allocated from high to low according to the second cost so as to meet the commodity total quantity limit of the front warehouse.
6. The inventory allocation device of the warehousing network according to claim 5, further comprising:
a second allocation quantity determining module, configured to determine, before the generating an allocation plan, an additional inventory within two days of a central warehouse group based on an initial inventory and a long-term safety inventory of the commodity when it is determined that the allocated commodity type does not exceed the commodity type limit of the pre-warehouse and/or the total amount of the allocated commodity does not exceed the commodity total amount limit of the pre-warehouse; and determining the long-term allocation quantity of the commodities allocated to the front warehouse by the central warehouse group; wherein the long term comprises greater than two days;
the allocation plan generating module is further used for selecting the quantity of the commodities to be allocated from high to low according to the second cost, and the long-term allocation quantity of the commodities is met on the premise that the quantity of the commodities does not exceed the extra stock in the two days of the central warehouse group.
7. A computer readable storage medium having stored thereon a computer program, which when executed by a processor implements a method of inventory allocation of a warehouse network as claimed in any one of claims 1 to 4.
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| CN110245897B (en) * | 2019-06-13 | 2022-03-29 | 杭州网易再顾科技有限公司 | Vehicle scheduling method and device, medium and computing equipment |
| CN110516919A (en) * | 2019-08-05 | 2019-11-29 | 三只松鼠股份有限公司 | A kind of logistics deployment system and method based on industry internet |
| CN111768144A (en) * | 2019-10-22 | 2020-10-13 | 北京京东尚科信息技术有限公司 | Product selection method and device for man-machine mixed warehouse |
| CN112348423A (en) * | 2019-11-07 | 2021-02-09 | 北京沃东天骏信息技术有限公司 | Method and device for regulating inventory |
| CN112907159B (en) * | 2019-11-19 | 2024-06-18 | 北京京东乾石科技有限公司 | Method and device for transferring inventory items |
| CN113361988A (en) * | 2020-03-06 | 2021-09-07 | 北京京东振世信息技术有限公司 | Inventory allocation method, device, system and storage medium |
| CN112308595A (en) * | 2020-03-24 | 2021-02-02 | 北京沃东天骏信息技术有限公司 | Method and device for determining the state of an item |
| CN112288209B (en) * | 2020-06-23 | 2022-11-08 | 北京沃东天骏信息技术有限公司 | Resource allocation method, device, equipment and medium based on allocation priority |
| CN113869811A (en) * | 2020-06-30 | 2021-12-31 | 上海顺如丰来技术有限公司 | Storage mode determining method and device, computer equipment and storage medium |
| CN112340337A (en) * | 2020-10-28 | 2021-02-09 | 深圳市海柔创新科技有限公司 | Front bin cargo processing method, control terminal, robot and system |
| CN113762859A (en) * | 2020-11-25 | 2021-12-07 | 北京沃东天骏信息技术有限公司 | Stock warehouse dividing method, device, system and storage medium |
| CN112819361A (en) * | 2021-02-20 | 2021-05-18 | 杭州拼便宜网络科技有限公司 | Inventory allocation system, method and equipment and readable storage medium |
| CN112990590B (en) * | 2021-03-26 | 2023-06-20 | 中国科学技术大学 | E-commerce logistics transit optimization method and system under network freight platform background |
| CN113077218A (en) * | 2021-04-16 | 2021-07-06 | 北京京东振世信息技术有限公司 | Storage network planning method and device, readable storage medium and electronic equipment |
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