CN110009180A - A kind of block chain JIT production management method - Google Patents
A kind of block chain JIT production management method Download PDFInfo
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Abstract
The invention discloses a kind of block chain JIT production management methods, 1) production process the following steps are included: is established block chain main chain by it as unit of each process, and it is arranged and the corresponding number of logistics node of process, and establish the relations of production between each adjacent streams node, logistics node in first process obtains after the task requests of the logistics node of rear process and execution, whether judgement currently meets the working condition in rear logistics node, the ratio L of the yield of each subchain of first logistics node is obtained using the common recognition mechanism of proof of work, the semi-finished product input ratio to form each subchain is fed back according to the ratio L of acquisition, sequentially preferential supply, quote the technology of block chain, framework in a distributed manner quickly solves the state of reaction JIT production, supplier is provided, customer, production status is understood with producers, no Only possess the safety of message, moreover it is possible to which the method for facilitating real-time management (high reliablity) to produce further decreases production and inventory cost.
Description
Technical field
The present invention relates to field of information management, and in particular to a kind of JIT production management method based on block chain.
Background technique
Real time implementation production technology (English: Just in time is abbreviated as JIT), also known as JIT production are a kind of production pipes
The methodology of reason improves the manager of trade investment return through the inventory and relevant incidental post reduced in production process
Method.In simple terms, the main target of timely system is to allow correct goods and materials, in the correct time, flow to correct place, number
Amount is quantity just.
In order to meet the target of punctual system, production procedure relies on label symbol or billboard management, the work of billboard
With being to tell worker, when the next process of carry out.In general, billboard is also readily modified as simple vision symbol
Number.JIT can help enterprise's sustained improvement production procedure, improve the rate of return on investment, quality, efficiency, employee of production enterprise
Participation and product flowing velocity.Reduce the wasting of resources caused by inventory.JIT inventory system thinks that inventory brings implicit
Cost, therefore efficient enterprise be not present inventory the problem of.Firstly, JIT production system encourages enterprise's successive elimination library
It deposits, cuts down the cost in production procedure.Secondly, gradually adapting to the state of " zero inventory " in management.
Three costs that JIT production system is worked out reduce the principle of waste.
One, the time that time cost-is wasted in the fabrication process.
Two, the product that inventory cost-is detained in the fabrication process.
Three, idle running cost-in the fabrication process, under irremovable state, in the still lasting idle running of machine.
Traditional mode of production mode is pushing-type production, such as the conventionally manufactured flow chart of Fig. 1.Fig. 2 is Just In Time (JIT)
Manufacturing flow chart, in the pull-type production process of Just In Time (JIT), be from rear end forward end require obtain it is defeated
Enter semi-finished product.This production method has two features, and (1) is one-to-one；(2) just demand can be punctual, reduces inventory and reaches drop
Low entirety production cost.
But there is station delay change on (1) and will cause shut-down in JIT production method.(2) station productivity promotion can make on
The shortcomings that increasing at WIP (semi-finished product).And the problem of wherein postponing, just has no idea to handle.
And, such as Fig. 3 new for that will be led to the problem of after the improvement of JIT.Such as: the problem condition after JIT improvement. S21
This group has two states with S22, and one is the same products of production, it is therefore an objective to accelerate production efficiency.Another kind is to produce not
The same product a, it is therefore an objective to semi-finished product will be assembled into the next stop.The third is can be mutual between same grade work station
Mutually support production.This patent considers the state of the first, because its is most widely used.Here S41, S42 and S43 is same
It is one group.The product and quantity that S5 can be needed to S4 continuous request；S4 series can require the product needed and quantity to S3, point
It dissipates to the work station in series；The product and quantity that S3 can be needed to S2 continuous request；S2 series can require the production needed to S1
Product and quantity, dispersion is to the work station in series.Entire production method belongs to the pull-type production of JIT, from rear end as front end level-one
Level-one requires input semi-finished product.
Continue example above, the demand of S5 is 10, then needs tri- total production quantity energy of work Zhan of S41, S42, S43
Enough meet 10 sums.Perhaps estimating average productive capacity is (x ', y ', z ')=(3,3,4), but the quantity really produced will not
It is easy to be known.The reason is that the semi-finished product quantity (x, y, z) respectively inputted is not easy to be measured, we only know that x+y+z is answered
10 should be at least, in no undesirable situation, just expectability meets the demand of S5 in this way.
And the model that traditional JIT production system can derive has following two.
(1) supplier manages inventory
The principle that supplier manages inventory (VMI) is similar with the principle of JIT production system.The people of management inventory is retail
Quotient is not the producer, and either the producer manages the inventory of retailer or the inventory of the retailer management producer, finally
Management role is attributed to retailer.
The advantage of this business model is that retailer can obtain experience to production link, and allowing them to be better anticipated needs
The inventory of the amount of asking and needs.Inventory planning and control can use simple application software, allow the inventory data of retailer, at any time
It is online to feed back production.
(2) Customer management inventory
Customer management inventory (CMI) system is different from retail competition, is that customer is allowed to have the power for determining inventory.
This is similar with the concept of JIT production system, big customer can with predicted required amount, so that production line and retailer be allowed to understand at any time,
To manage inventory.
Above both of which is to need to build a centralized host to provide service.Still have what centralization calculated
Problem, if in large-scale manufacturing environment, demand a work stations up to a hundred, the manufacturing environment of thousands of a spare parts, such as automobile.Then
Excessive data punctuality access issues will be generated, if the operational capability of host server is insufficient or database is to mistake
The treatment efficiency of big data is bad, it will causes very big problem.In addition, each work station will can only handle the JIT of batch type,
Production quantity can not accurately be managed and propose stock demand.
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of JIT production management method based on block chain.
To achieve the above object, the present invention provides a kind of JIT production management method based on block chain comprising following
Step:
1) production process is established to block chain main chain as unit of each process, and is arranged and the corresponding number of object of process
Node is flowed, and establishes the relations of production between each adjacent streams node；
2) a number of subchain is established respectively for each process, the subchain in identical process respectively corresponds identical
Logistics node；
3) there is the corresponding relations of production, the logistics node in first process obtains between two neighboring logistics node
Afterwards after the task requests of the logistics node of process and execution, whether judgement currently meets the working condition in rear logistics node；
If 4) meet the working condition in rear logistics node, rear logistics node obtain the half of first logistics node at
Product, while formerly logistics node stops production, if not being able to satisfy the working condition in rear logistics node, first logistics node continues
Production；
5) data and block Hash information are sent to this in rear logistics node by logistics node first simultaneously, and by
The acquisition data and block Hash information are stored in rear logistics node；
6) each logistics node in block chain main chain is handled according to step 3)-step 5) respectively, is completed entire
Production,
Block chain main chain and subchain dispose intelligent contract simultaneously, provide inquiring stock function.
Each logistics node has to be connect for the output interface of yield data output and the input for yield data input
Mouthful.
Each logistics node includes the first block and the second block, and first block is for indicating production information, institute
The second block is stated for indicating inventory information.
There is corresponding relationship, the first block obtains the task in the second block between first block and the second block
After requesting and executing, whether judgement currently meets the inventory requirements in the second block, if meeting the inventory requirements of the second block, the
Two blocks then obtain the semi-finished product in the first block, while the first block stops production, if not being able to satisfy in the library of the second block
Demand is deposited, the first block continues to produce.
First block is made of several subchains.
Beneficial effects of the present invention: the technology of reference block chain, framework in a distributed manner quickly solve reaction JIT production
State, provide supplier, customer and producers understand production status, not only possessing the safety of message, (individually modification is not
The method that can also easily) facilitate real-time management (high reliablity) to produce, further decreases production and inventory cost.
Detailed description of the invention
Fig. 1 is conventionally manufactured flow diagram.
Fig. 2 is Just In Time (JIT) manufacturing process schematic diagram.
Fig. 3 is to improve JIT manufacturing process schematic diagram.
Fig. 4 is block chain logistics node relational graph.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention
In explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if should
When particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In the present invention unless specifically defined or limited otherwise, term " connection ", " fixation " etc. shall be understood in a broad sense,
For example, " fixation " may be a fixed connection, it may be a detachable connection, or integral；It can be mechanical connection, be also possible to
Electrical connection；It can be directly connected, the connection inside two elements or two can also be can be indirectly connected through an intermediary
The interaction relationship of a element, unless otherwise restricted clearly.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
In addition, the description for being such as related to " first ", " second " in the present invention is used for description purposes only, and should not be understood as
Its relative importance of indication or suggestion or the quantity for implicitly indicating indicated technical characteristic.Define as a result, " first ",
The feature of " second " can explicitly or implicitly include at least one of the features.In addition, the technical side between each embodiment
Case can be combined with each other, but must be based on can be realized by those of ordinary skill in the art, when the combination of technical solution
Conflicting or cannot achieve when occur will be understood that the combination of this technical solution is not present, also not the present invention claims guarantor
Within the scope of shield.
The present invention provides a kind of JIT production management method based on block chain comprising following steps:
1) production process is established to block chain main chain as unit of each process, and is arranged and the corresponding number of object of process
Node is flowed, and establishes the relations of production between each adjacent streams node；
2) a number of subchain is established respectively for each process, the subchain in identical process respectively corresponds identical
Logistics node；
3) there is the corresponding relations of production, the logistics node in first process obtains between two neighboring logistics node
Afterwards after the task requests of the logistics node of process and execution, whether judgement currently meets the working condition in rear logistics node；
If 4) meet the working condition in rear logistics node, rear logistics node obtain the half of first logistics node at
Product, while formerly logistics node stops production, if not being able to satisfy the working condition in rear logistics node, first logistics node continues
Production；
5) data and block Hash information are sent to this in rear logistics node by logistics node first simultaneously, and by
The acquisition data and block Hash information are stored in rear logistics node；
6) each logistics node in block chain main chain is handled according to step 3)-step 5) respectively, is completed entire
Production,
Block chain main chain and subchain dispose intelligent contract simultaneously, provide inquiring stock function.
In the same manufacture system, under respective work station no matter how many sub- work station (same producer
Formula), all one distribution spot of organizational system, participates in intelligent contract.Then when the latter work station can collect immediately it is enough
After sum, new semi-finished product are asked for forward in stopping, reaching the characteristic of time and output optimization whereby.
Block information processing unit is equipped in each block, information collection block base station in block information processing unit
It is information fusion device, is used for aggregation information, corresponding Hash tree (Hash) relationship is established to the sensing record of location.
Wireless sensor network includes the record content of all the sensors of the block.Block chain is through hash algorithm to a transaction block
In transaction encrypted, message be compressed into string number and letter composition hash character string.Arbitrary node in block chain
Corresponding cryptographic Hash can be obtained through simple Hash calculation.If there is no variations just to represent for the cryptographic Hash calculated
Message in block is not modified.Under sequential Block Set, each block is synchronous their own in progress again
Work.
Each logistics node has to be connect for the output interface of yield data output and the input for yield data input
Mouthful.
Each logistics node includes the first block and the second block, and first block is for indicating production information, institute
The second block is stated for indicating inventory information.
There is corresponding relationship, the first block obtains the task in the second block between first block and the second block
After requesting and executing, whether judgement currently meets the inventory requirements in the second block, if meeting the inventory requirements of the second block, the
Two blocks then obtain the semi-finished product in the first block, while the first block stops production, if not being able to satisfy in the library of the second block
Demand is deposited, the first block continues to produce.
First block is made of several subchains, and the main chain using it as finishing operation also can be set in each subchain, according to
It is secondary that above-mentioned operation is carried out to main chain, to realize the block chain setting of the process flow of a whole set of process.
In block chain theory, there is an important characteristic.Why it is " common recognition mechanism " because have safely,
Briefly, the data in block chain can copy to all inter-nodes, if someone only modifies a production machine at this time
On data, the record in other production machines all do not change to then this movement just will fail.Unless in modification production machine
Data be more than all machines 50% or more, then represent have common recognition, even if this data successfully.However, in block chain
The world, its difficulty is exactly to be not easily found relevant 50% and modify, so data have tight security.
Although common common recognition mechanism has proof of work (Proof of Work, PoW), equity to prove (Proof of
Stake, PoS) and three kinds of share authorisation verification (DPoS).PoW is proved from the result of working quantity, and PoS is that have not
With weight distinguish, the DPoS way for belonging to weight similar with PoS, difference is with set time segmented mode, probability change
Dynamic generation block.
Continue the example of two problems in front, the demand of S5 is 10, then needs tri- work Zhan Zongsheng of S41, S42, S43
Producing quantity can satisfy 10 sums.In production process, we perhaps estimate average productive capacity be (x', y', z')=(3,3,
4) amount that the quantity, still really produced under " common recognition mechanism " will be not easy to meet us and estimate.Intuitively, it respectively inputs
Semi-finished product quantity ratio is x:y:z=3:3:4.In order to meet the demand of expected S5, our common recognition mechanism quotes proof of work
Method, x, y, z are assigned with the angle of production quantity.
So under a possibility that including bad, x, y, the proportion of z quantity, it will with x', y', the z' unit time is produced
Quantitative proportion feedback to x, y, z quantitative proportion.
Such as:
(x', y', z')=(1,1,1), x', y', the yield of z' unit time all do not account for more than whole 51%, then preceding S3
Production quantity can sequentially (x, y, z)=(1,1,1) carry out semi-finished product distribution.
(x', y', z')=(0,2,2), y', the yield of z' unit time are more than the 51% of whole, then preceding S3 production quantity
The distribution of meeting sequentially (x, y, z)=(0,1,1) progress semi-finished product.Due to y, z ratio is the same, then one product of S3 reproduction when
It waits, will become (x, y, z)=(0,2,1)；Similarly, one product of S3 reproduction then will become (x, y, z)=(0,2,2), with
This analogizes.
Embodiment 1, the quantity of work station input are consistent with the quantity of output.Quantity unanimously represent no inventory, defective products,
With in product.We claim inventory, defective products and are all at product (Working In Process, WIP), into work in product
The product quantity for making to stand is equal to the product quantity at output services station.In the possible variation of production process of not expectable each work station
Process includes quality testing, will affect the production total quantity completed in production of units.We with S4 work station (S41, S42,
It S43 then may be S41, three son work such as S42, S43 if S5 needs 10 semi-finished product) from the point of view of the relationship between S5
It stands and exports semi-finished product, sum is at least 10.It is sequentially S41 → S42 → S41 → S42 → S43 according to the record of production of block chain
→S43→S43 →S41→S42→S42.In other words, no matter S41, the input quantity of S42, S43 work station be it is how many,
When sum, which reaches, is at least 10, it will feedback meet demand stops continuing transferring semi-finished product according to workstation requirement forward.
From the point of view of the work station of S4, if the quantity for having several stages to complete the production of respective sub- work station is recorded
The variation of record, factor work station process personnel or machinery connects so that the production quantity of different phase also has some differences to S5
When the sum of receipts reaches 10, stopping manufacture will being carried out by feeding back block chain message.
If the state that each work station input meets and output meets, inputs semi-finished product process, negative sign represents also insufficient number
Amount, can feed back to a work station, it is desirable that the quantity for continuing productional surplus, until total amount meets.0 represents input completely
Connecing for foot disconnected meets anticipated demand.
The quantity of 2 work station of embodiment input and the quantity of output are inconsistent.Representative is there are inventory, defective products or is making
Product are the quantity into the same output services station in varying numbers of the work station.Even if the input of previous sub- work station is more than defeated
It is more out, as long as no the requirement for reaching this work station, then before work station can its previous work station of continuous repeat request it is lasting
Qualified semi-finished product are inputted, so as to its production, qualified semi-finished product is exported and gives our station.
The state that each work station input meets and output meets, inputs semi-finished product process, and negative sign represents also insufficient quantity,
A work station can be fed back to, it is desirable that the quantity for continuing productional surplus, until total amount meets.0 represents what input met
Product quantity meets anticipated demand.
Present case shows that yield to be mended refers to so-calledly, generally when having defective products or can range WIP in the process of product
After input meets, regardless of WIP whether there is, " yield to be mended " is referring to require supplementation with to the quantity of the next stop.
The production result sum of unit time each work station.This unit time, Δ t was the production time for making a product by oneself,
Such as: there are three sub- work station under a work station S4, the time that S41, S42, S43 produce a semi-finished product for the work is
Δ t is averagely then 3.Here be with the definition and explanation of S4 work station relevant parameter, actual state can with and so on.
(1) it is x', y', z' that the input of work station S41, S42, S43, which meets quantity,.X', y', z' ∈ [1, ∞).
(2) it is x, y, z that the output of work station S41, S42, S43, which meets quantity,.X, y, z ∈ [1, ∞).
(3) the goods in process inventory x of work station S41, S42, S43wip, ywip, zwip∈ [0, ∞).
(4) according to above relationship, 1≤x'≤x, 1≤y'≤y, 1≤z'≤z can be learnt.
(5) unit time of sub- work station S41, S42, S43 input quantity x'+y'+z' >=δ a' of each work station.Unit
The quantity that time inputs each work station is that δ a'(1≤a' is less than b').Here a' is the sub- station number in work station, b'
For the sum of sub- work station.A', b' ∈ integer.
(6) unit time of sub- work station S41, S42, S43 export the quantity x+y+z=δ a of each work station.Unit time
The quantity for exporting each work station is δ a (1≤a < b).Here a is the sub- station number in work station, and b is sub- work station
Sum.A, b ∈ integer.
Embodiment step is as follows
Step 1, creation block chain.According to the sequence of JIT manufacture work, every sub- work station establishes input yield and output
The correspondence message node of yield.
Step 2, carry out work station input number δ a', a ∈ [0, ∞).
Step 3, carry out work station output number δ a, a ∈ [0, ∞).
Step 4, the value for updating δ a'.The anticipated demand amount ρ of known each work station.
Step 4-1, ∑ (x'+y'+z') is obtained, x':y':z' production quantity is obtained according to the common recognition mechanism of proof of work
Ratio L, L > 51%,
Step 4-2, according to the ratio L of x':y':z', feedback forms each sub- work station x, and the semi-finished product of y, z input ratio
Example, sequentially preferential supply.
If step 4-3, the sum total < 0 of ∑ (x'+y'+z') (not yet input meets)；A upper workstation requirement is then fed back to mend
Quantity of the foot less than 0.
If step 4-4, sum total >=0 (reaching input to meet) of ∑ (x'+y'+z')；It then feeds back a upper work station and stops life
It produces.
If step 4-4-1, the quantity > 0 of WIP；Then feed back the quantity that a upper workstation requirement supplies WIP.It sets and is produced wait mend
Amount is equal to the quantity of WIP.
If step 4-4-2, quantity≤0 of WIP；Then without the concern for representative does not have the problem of inventory.
If step 4-5, sum total >=0 (reaching input to meet) of ∑ (x+y+z) and presence yield < 0 to be mended；Then feed back
A upper workstation requirement supplies the quantity less than 0.
If step 4-6, sum total >=0 (reaching input to meet) and presence yield=0 to be mended of ∑ (x+y+z)；Then this work
Make station and stops production.
Embodiment is not construed as limitation of the present invention, but any based on spiritual improvements introduced of the invention, all should be
Within protection scope of the present invention.
Claims (5)
1. a kind of JIT production management method based on block chain, it is characterised in that: itself the following steps are included:
1) production process is established to block chain main chain as unit of each process, and is arranged and the corresponding number of logistics section of process
Point, and establish the relations of production between each adjacent streams node；
2) a number of subchain is established respectively for each process, the subchain in identical process respectively corresponds identical logistics
Node；
3) there is the corresponding relations of production, the logistics node in first process is obtained in rear stream between two neighboring logistics node
After the task requests of the logistics node of journey and execution, whether judgement currently meets the working condition in rear logistics node；
If 4) meet the working condition in rear logistics node, the semi-finished product of first logistics node are obtained in rear logistics node, together
Shi Xian logistics node stops production, if not being able to satisfy the working condition in rear logistics node, first logistics node continues to produce；
5) data and block Hash information are sent to this in rear logistics node by logistics node first simultaneously, and by rear
Logistics node stores the acquisition data and block Hash information；
6) each logistics node in block chain main chain is handled according to step 3)-step 5) respectively, completes entire product
Production,
Block chain main chain and subchain dispose intelligent contract simultaneously, provide inquiring stock function,
Wherein the common recognition mechanism in step 3) using proof of work obtains the ratio of the yield of each subchain of first logistics node
Example L feeds back the semi-finished product input ratio to form each subchain, sequentially preferential supply according to the ratio L of acquisition.
2. a kind of JIT production management method based on block chain according to claim 1, it is characterised in that: each logistics
Node has the output interface for yield data output and the input interface for yield data input.
3. a kind of JIT production management method based on block chain according to claim 1, it is characterised in that: each logistics
Node includes the first block and the second block, and for first block for indicating production information, second block is used for table
Show inventory information.
4. a kind of JIT production management method based on block chain according to claim 3, it is characterised in that: described first
There is corresponding relationship, the first block obtains after the task requests of the second block and execution, sentences between block and the second block
The disconnected inventory requirements currently whether met in the second block, if meeting the inventory requirements of the second block, the second block is obtained
The semi-finished product of first block, while the first block stops production, if not being able to satisfy the inventory requirements in the second block, the first block
Continue to produce.
5. a kind of JIT production management method based on block chain according to claim 3, it is characterised in that: described first
Block is made of several subchains.
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