CN102542364A - Method and system for balancing substitute materials in material requirement planning - Google Patents
Method and system for balancing substitute materials in material requirement planning Download PDFInfo
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- CN102542364A CN102542364A CN2010105784591A CN201010578459A CN102542364A CN 102542364 A CN102542364 A CN 102542364A CN 2010105784591 A CN2010105784591 A CN 2010105784591A CN 201010578459 A CN201010578459 A CN 201010578459A CN 102542364 A CN102542364 A CN 102542364A
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Abstract
The invention relates to a method for balancing substitute materials in material requirement planning. The method for balancing the substitute materials in the material requirement planning comprises the following steps of: forming a material substitution tree according to a material substitution relationship such that each material is taken as a node of the material substitution tree, a substituted material is taken as a child node of the substitute material, and a substitute material is taken as a father node of the substituted material; computing a supply and demand condition of the nodes in each production sub-stage according to the material supply and demand information of a lowest layer of child node of the material substitution tree so as to obtain substitution demand data; and computing the supply and demand condition of the nodes according to the material supply and demand information of all levels of father nodes and the substitution demand of the corresponding child nodes so as to obtain the substitution demand data. In addition, the invention further relates to a system for balancing the substitute materials in the material requirement planning. According to the material substitution relationship and the supply and demand information of the materials with the substitution relationship, the method and the system can organize the materials with the substitution relationship into the material substitution tree to substitute and manage, and a layer-by-layer computation method is adopted, so that the substitutions of all materials can be computed and completed in one step to improve the management efficiency.
Description
[technical field]
The present invention relates to handling of goods and materials, especially relate to the method and system of the alternative material of balance in a kind of MRP.
[background technology]
Adopt the area of computer aided enterprise production management; At first to make computing machine can read the product slate and all materials that will relate to of enterprise's manufacturing; For the ease of computer Recognition, must change into product structure certain data layout with Graphic Expression, this file of describing product structure with data layout is exactly a BOM; Promptly be BOM (Bill Of Material, BOM).It is the technological document of definition product structure, and therefore, it is called product structure table or product tree again.
Owing to different to the requirement of product quality, adopt new material or change in the work etc. in order to reduce cost, the material that often needs to have use now replaces to new material.In original product structure, required material supply and demand time, supply and demand amount etc. all are changeless, when the management material, can manage easily according to the program of prior setting.
Yet when relating to the material replacement, material supply and demand originally certainly will change, and need recomputate so that the material equilibrium of supply and demand.In traditional replacement management, B is an example with material A replacement material, adopts following mode to replace:
1. calculate the equilibrium of supply and demand of material A during certain;
2. calculate the material B equilibrium of supply and demand of phase at the same time, if in this period the material replacement takes place, then can the alternative demand of material B be inserted in the material A, cause the equilibrium of supply and demand of material A to be broken, material A need recomputate.
From on can find out, material replacement taking place each time all can cause the equilibrium of supply and demand of material A to be destroyed, and need recomputate.Be that number of times that material A need be reruned is exactly that number of times by the alternative demand of material B decides.This makes the efficiency of management greatly reduce, and especially when relating to the various materials replacement, it is very frequent that calculating will become.
[summary of the invention]
Based on this, be necessary to provide balance in a kind of MRP that improves the efficiency of management to substitute the method for material.
Balance substitutes the method for material in a kind of MRP, comprises the steps: the process of production is divided into a plurality of production subs according to the production demand; Produce sub at each, obtain the supply and demand information of the material that said production sub relates to substitutional relation; Supply/demand according to every kind of material of said supply and demand information calculations; Wherein, to per two continuous production subs, the next son stage calculates after a last sub.
Preferably; The step of said supply/demand according to every kind of material of supply and demand information calculations specifically comprises: form the material substitution tree according to the material substitution relation; Make the node of each material as said material substitution tree; Be replaced material as the child node that substitutes material, substitute material as the father node that is replaced material; According to the material supply and demand information of the bottom child node of said material substitution tree, the supply/demand of computing node obtains substituting demand data; According to the material supply and demand information of father nodes at different levels and the alternative demand of corresponding child node, the supply/demand of computing node obtains substituting demand data step by step.
The system of the alternative material of balance in a kind of MRP also is provided in addition.
Balance substitutes the system of material in a kind of MRP; Comprise server and be connected at least one client of carrying out data interaction with server; Said server comprises receiver module and processing module, and said client comprises acquisition module: said acquisition module is used for producing sub at each and gathers material supply and demand document and material substitution relation and send to receiver module; Said receiver module receives said material supply and demand document and material substitution relation; Said processing module is according to the supply/demand of every kind of material of said supply and demand information calculations.
Preferably, said processing module specifically forms the material substitution tree according to the material substitution relation, makes the node of each material as said material substitution tree, is replaced material as the child node that substitutes material, substitutes material as the father node that is replaced material; According to the material supply and demand information of the bottom child node of said material substitution tree, the supply/demand of computing node obtains substituting demand data; According to the alternative demand of father node material supply and demand information at different levels and corresponding child node, the supply/demand of computing node obtains substituting demand data step by step.
This management method of said method and system and system manage by producing sub, carry out the material supply/demand is carried out one-time calculation at each sub, can reduce unpredictable substituting as far as possible.
Further; According to material substitution relation with have the supply and demand information of the material of substitutional relation, will there be the material of substitutional relation to be organized into the material substitution tree and substitute management, and adopt Calculation Method successively; Make substituting of all materials once calculate completion, improve the efficiency of management.
[description of drawings]
Fig. 1 is the process flow diagram that balance substitutes material in the MRP of an embodiment;
Fig. 2 is the material substitution tree synoptic diagram of an embodiment;
Fig. 3 is the system construction drawing that balance substitutes material in the MRP of an embodiment.
[embodiment]
Below in conjunction with specific embodiment the method and system that balance in the MRP substitutes material is further specified.
The method of the alternative material of balance at first is divided into a plurality of production subs with the process of production according to the production demand in the MRP of present embodiment.Producing sub is some time periods of product whole process of production, and a plurality of continuous production subs constitute the whole process of production of product jointly.Produce sub and mainly divide according to the production demand, the production demand is the various standardization requirements in the process of producing product, such as dividing according to operation.
Secondly, each is generated sub, obtain the supply and demand information of all materials with substitutional relation.Generate sub at each, the material that relates to maybe be different, and a lot of substitutional relations are arranged again between the various materials.Obtain the supply and demand information of that relate to and the material that have substitutional relation of this production sub, be used to calculate the supply/demand of every kind of material.All materials with substitutional relation are organized together, and obtain material supply and demand information in advance, can disposable every kind of material supply/demand be calculated, can not occur because the interim problem that causes repeated calculation that substitutes.And because the division of sub, the material supply/demand in each stage is easy to control, reduces the interim possibility that takes place that substitutes.
Generally has tangible sequencing between above-mentioned each sub-phase.Therefore account form is to calculate the supply/demand of the inner every kind of material of each sub earlier, is that sub calculates one by one then.Promptly to per two continuous production subs, the next son stage calculates after a last sub.
Wherein, specifically as shown in Figure 1 in the present embodiment according to the step of the supply/demand of every kind of material of said supply and demand information calculations, comprise the steps:
S10: form the material substitution tree according to the material substitution relation, make the node of each material, be replaced material, substitute material as the father node that is replaced material as the child node that substitutes material as said material substitution tree.
In the production run of a product, relate to the alternative use of material.Material substitution has a variety of causes and mode, like deficiencies of stores, use the lower material of price, produce products etc. by different quality requirements.The main material that is generally used for producing product is called the principal goods material, and the material that is used for substituting the principal goods material is called and substitutes material.According to the production purpose with produce the different of period, alternative material has a variety of, and according to priority forms substitutional relation step by step.For example in a sub-phase of producing, the principal goods material is A, B, and preferential spent material C substitutes, material C and then can substitute by spent material D again.Therefore for embodying this substitutional relation, material is organized into the material substitution tree.As shown in Figure 2, be the material substitution tree of present embodiment.Wherein principal goods material A, B all can be substituted by material C, so principal goods material A, B be the child node of material C, and material C is the father node of principal goods material A, B, and in like manner, material C is the child node of material D, and material D is the father node of material C.
S20: produce sub at each, get the bottom child node of said material substitution tree, according to material supply and demand information, the supply/demand of computing node obtains substituting demand data.Producing sub is the some time periods in producing, and is provided with according to the production demand.General production run all comprises plural production sub.The material of material substitution tree bottom child node is the principal goods material in the production run, and in the present embodiment, bottom child node is material A, B.
The production sub begins, and can list the demand for the principal goods material, and the storage situation of each principal goods material promptly is the supply of this material.Supply is deducted demand, obtain the supply/demand of material, when difference is not less than zero, represent in liberal supplyly, need not use alternative material; When difference less than zero the time, represent under-supplyly, need to use to substitute material, this moment, the absolute value of this difference was exactly the alternative demand data of principal goods material for alternative material.For example in the phase one of producing, principal goods material A demand 1000, principal goods material B demand 800, if principal goods material A, B each need 900, then the supply and demand difference of A is 1000-900=100, the supply and demand difference of B is 800-900=-100.For this reason, material B produces the demand 100 that substitutes at the father node place of its alternative material C.
After bottom child node is calculated completion, just can calculate the supply/demand of father nodes at different levels step by step.
S30: father nodes at different levels are according to the alternative demand of material supply and demand information and corresponding child node, and the supply/demand of computing node obtains substituting demand data.In the present embodiment, at first calculate the supply/demand of material C, at this moment; Except that the demand of material C not only comprise plan demand to itself (as phase at the same time as the principal goods material of other production phases); The alternative demand that also has material B, if material C supply 800, the plan demand also is 800; The alternative demand of material B is 100, and then the supply and demand difference of material C is 800-800-100=-100.Secondly, calculate the supply/demand of the father node D of material C.Computing method are identical with the method for the supply/demand that calculates material C.
As shown in Figure 3, be the system construction drawing that balance substitutes material in the MRP of an embodiment.This system comprises server 10 and is connected at least one client 20 of carrying out data interaction with server 10.Server 10 comprises receiver module 12 and processing module 14, and client 20 comprises acquisition module 22.
Acquisition module 22 is used for producing sub at each and gathers material supply and demand document and material substitution relation and send to receiver module 12.Receiver module 12 receives said material supply and demand document and material substitution relation.
Processing module 14 is used for the supply/demand according to every kind of material of said supply and demand information calculations.Be specially: form the material substitution tree according to the material substitution relation, make the node of each material, be replaced material, substitute material as the father node that is replaced material as the child node that substitutes material as said material substitution tree; According to the material supply and demand information of the bottom child node of said material substitution tree, the supply/demand of computing node obtains substituting demand data; According to the alternative demand of father node material supply and demand information at different levels and corresponding child node, the supply/demand of computing node obtains substituting demand data.
The above embodiment has only expressed several kinds of embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with accompanying claims.
Claims (4)
1. balance substitutes the method for material in the MRP, it is characterized in that, comprises the steps:
The process of production is divided into a plurality of production subs according to the production demand;
Produce sub at each, obtain the supply and demand information of the material that said production sub relates to substitutional relation;
Supply/demand according to every kind of material of said supply and demand information calculations;
Wherein, to per two continuous production subs, the next son stage calculates after a last sub.
2. balance substitutes the method for material in the MRP as claimed in claim 1, it is characterized in that, the step of said supply/demand according to every kind of material of supply and demand information calculations specifically comprises:
Form the material substitution tree according to the material substitution relation, make the node of each material, be replaced material, substitute material as the father node that is replaced material as the child node that substitutes material as said material substitution tree;
According to the material supply and demand information of the bottom child node of said material substitution tree, the supply/demand of computing node obtains substituting demand data;
According to the material supply and demand information of father nodes at different levels and the alternative demand of corresponding child node, the supply/demand of computing node obtains substituting demand data step by step.
3. balance substitutes the system of material in the MRP, comprises server and is connected at least one client of carrying out data interaction with server, and said server comprises receiver module and processing module, and said client comprises acquisition module:
Said acquisition module is used for producing sub at each and gathers material supply and demand document and material substitution relation and send to receiver module;
Said receiver module receives said material supply and demand document and material substitution relation;
Said processing module is according to the supply/demand of every kind of material of said supply and demand information calculations.
4. balance substitutes the system of material in the MRP as claimed in claim 3; It is characterized in that; Said processing module specifically forms the material substitution tree according to the material substitution relation; Make the node of each material, be replaced material, substitute material as the father node that is replaced material as the child node that substitutes material as said material substitution tree; According to the material supply and demand information of the bottom child node of said material substitution tree, the supply/demand of computing node obtains substituting demand data; According to the alternative demand of father node material supply and demand information at different levels and corresponding child node, the supply/demand of computing node obtains substituting demand data step by step.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104766179A (en) * | 2015-04-23 | 2015-07-08 | 广州视源电子科技股份有限公司 | Maintenance method and system for substitute materials |
| CN111105134A (en) * | 2019-11-11 | 2020-05-05 | 华勤通讯技术有限公司 | Material demand plan calculation method and platform, electronic device and storage medium |
| CN111209765A (en) * | 2018-11-21 | 2020-05-29 | Oppo（重庆）智能科技有限公司 | Method and device for identifying material bar code and terminal equipment |
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