Classifications

• • G—PHYSICS
  • G06—COMPUTING; CALCULATING OR COUNTING
  • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
  • G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
  • G06Q50/04—Manufacturing
• • G—PHYSICS
  • G06—COMPUTING; CALCULATING OR COUNTING
  • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
  • G06Q10/00—Administration; Management
  • G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling

Definitions

• the present invention relates to the field of computer-aided production management (CAPM).
• the present invention relates more particularly to a method and a CAM system for management of pull production.
• the US patent US5193065 is known in the state of the art. This patent describes a system for requesting and distributing materials in a manufacturing environment.
• a manufacturing station stores and uses the material and produces a first missing material signal in response to the depletion of a predetermined amount of material normally found in the manufacturing station.
• a smart storage unit stores the material.
• a computer system receives the first missing material signal and responds by searching for the storage unit, producing a material transfer control signal corresponding to the presence of material in the storage unit, and producing a trigger signal d 'shipment corresponding to the absence of material in the storage unit.
• a microcomputer generates a program for the material.
• a logic device receives the send trigger signal and generates a depletion signal in response to the send trigger signal and the material program.
• the KANBAN is therefore a signal (label) which informs a supplier that he must remanufacture, or deliver the quantity actually consumed by his client.
• the present invention makes it possible to pass from the manual drawn flow to the computerized drawn flow, and thus to resolve all the above drawbacks.
• the present invention intends to remedy the drawbacks of the prior art by proposing to keep the RP2 flow concept by adding the possibility of the pull concept. (See Figure 2).
• the production management method according to the example described is intended to organize the exchange of information between the various manufacturing, purchasing and distribution processes involving the actors, means and stakeholders of a global supply chain, as well as the management of transfers and stages of material transformation.
• Information is generally transmitted from downstream to upstream, that is to say that it comes from the market to be transmitted to suppliers.
• the materials come from suppliers, and undergo successive transformation processes, to lead to delivery to the customer.
• Figure 1 illustrates the principles implemented in the solutions of the state of the art.
• Each final product sold is broken down into components associated with a classification. Starting from the final product, we express upstream the needs for components at the previous level.
• the information known at a given level N makes it possible to calculate new information at the previous level N-1, as a function:
• the expression of the net needs (quantity B, at a given date D) in final product constitutes the input data, which will trigger the calculations of the net needs at the lower levels, in a deterministic way, in the form of a net need. at the lower level, expressed as quantities and deadlines.
• the net needs are determined at the upstream stage by: - calculating the difference D between the need B and the quantities of existing final products in stock as well as those in the process of being developed, that is to say the process of transformation from step N1 to step N has been initiated.
• This result (D, J) constitutes the expression of the needs of the upstream step N1. It makes it possible to calculate by propagation of needs at each of the intermediate stages, up to the initial stage in components, in accordance with the organization of the nomenclature of the final product.
• the purpose of the process according to the invention is to remedy this drawback, by proposing a new solution illustrated in FIG. 2.
• the invention consists in taking into account the work-in-progress (intermediate components being manufactured between two successive stages) and the stocks existing at each of the stages, to calculate the quantities available at each stage.
• Fluctuations in demand are absorbed by changes in stocks.
• the invention consists not in imposing the date of manufacture at each of the intermediate stages after each calculation, but in imposing the level B of the stock necessary to meet demand, at each of the intermediate stages.
• the process results in: control of the smoothing of work in progress, desynchronization of the manufacturing stages due to the autonomy of component management and the principles of management of controlled and controlled intermediate stocks, generally non-zero.
• the setpoint for the state of order expectations can be a negative value allowing to anticipate a slowing down or even a stopping of upstream needs.
• the method according to the invention is a set of tools for industrial management assistance which makes it possible to optimize, at all times, the choice between a logic forecast allocation of resources (Type MRP in Pushed Flow) and a mechanism for reconstituting consumption (Pulled Flow). It is modular, which means that it makes it possible to integrate additional functionalities into an existing CAPE system or process as well as to constitute all or part of a stand-alone CAPE equipment.
• the invention relates, according to its most general meaning, to a process for the management of computer-assisted pull production, comprising:
• a step of constructing a nomenclature in the form of a digital table comprising the information relating to the links between a given finished product and the components making up said finished product
• the step of determining the number of product needs concerns the needs for raw products, and, presents a step of "KANBAN” or “threshold” type, the calculation of a parameter of average daily consumption (CMJ) by determining the ratio of gross requirements to the number of days in said specified period.
• CMJ parameter of average daily consumption
• the step of constructing the table of components comprises, for the components whose descriptor having a management mode of the "KANBAN” or “threshold” type, the definition of a parameter corresponding to the duration of the period of calculation of demand.
• the method uses counters measuring the state of different parameters and transmitting the information to a computer to calculate the setpoints and propose the orders, or even to automate the different stages of the management chain.
• PF finished product
• a table in memory describes the parameters.
• the method according to the invention will include a step of calculating a parameter of Average Daily Consumption (or CMJ) by determining the ratio of gross needs to the number of days of said specified period ...
• each component is associated with a digital table, comprising for example descriptors such as:
• Counter C4 in which the state of the number of “Kanban” is recorded during manufacture or during the order. These counters are materialized by physical or electronic counters, such as memory registers, electronic circuits or analog or digital indicators.
• the state of the standby counter C3 is determined by the difference between the counters C0 and Cl and, when the value of the standby counter C3 is negative, the consumption reconstitution loop is inhibited.
• the state of the C3 standby counter is determined by the difference between the CO and Cl counters and, when the value of the C3 standby counter is positive and the batch size is reached, the loop for reconstituting the consumed is activated.
• an order threshold value for components having a “order threshold” type step, there is associated an order threshold value, an inventory value, and a work in progress or order value. It is inhibited when the order threshold is lower than the source of the stock and the order or manufacturing work in progress.
• each component is associated, for the components whose descriptor having a "KANBAN" type step, with a digital table comprising the following meter descriptors:
• the state of the standby counter C3 is determined by the difference between the counters C0 and Cl.
• the consumption reconstitution loop is inhibited when the value of the C3 wait counter is negative.
• the state of the standby counter C3 is determined by the difference between the counters CO and Cl, and in that the consumption reconstitution loop is activated when the value of the standby counter C3 is positive and that lot size is reached [1 KANBAN or
• the method comprises steps of introducing parameters relating to external constraints to modify the state of the waiting counter C3.
• the method consists in imposing a value D on the counter C3 corresponds to the largest of the values between the value calculated for the minimization of the waiting stock, and the value of the external constraint.
• the value C3 can be a negative value.
• a system according to the invention comprises a first step of constructing a nomenclature in the form of a digital table comprising the information relating to the links between a given finished product and the components making up said finished product.
• Figure 3 shows the organization diagram of a finished product PF1 (1).
• the ENS component (3) is itself composed of two PP2 type components (4) and two PP3 type components (5). These two types of components (4, 5) are developed at the next upstream level (Level 2).
• Component PP3 (5) is composed of 1.5 components
• the finished product PF is composed of five components PP, ENS1, PP2, PP3, MPI developed on 3 different levels. We associate with each level of nomenclature a stock of desynchronization as shown schematically in the figure.
• the component management parameters are associated with each component, in the form of a digital table.
• the content of the table is made up of parameters such as: Reference, Designation, Type Flow, Management unit, Piloting mode, Date piloting mode, Declaration mode, label flag, traceability flag, Peak time unit, Gross need time unit, CMY horizon , CMY horizon shift, current KB, previous KB, waiting KB, Creation date, User, Creation, Modification date, Modification user, Batch, Security.
• Each component has one and only one control mode.
• Appendix 1 represents an example of a table of control modes for each of the components of the PF1 nomenclature. We then determine the number of product requirements (calendar requirements over a rolling 12-month period)
• This need is expressed in the form of a table indicating for each of the coming periods the quantities of finished FP products required.
• This calendar breakdown can be expressed in weeks or days, especially in the first months of expression, ie M, M + 1
• the components PF 1 may have links with a plurality of finished products PF.
• the system will combine the needs of the common components of all the FP classifications.
• This variable takes into account the monthly gross requirements calculated by the system, and a period expressed in number of days, to make an average on the gross requirements during the period considered.
• the meters take into account the intrinsic data and the set values relating to the requirements for finished products and components. In some applications, they can also take into account external parameters relating to the availability of components, including components at the most upstream level. In this case, the counter C3 receives a value corresponding to the largest of the values between the value calculated for the minimization of the waiting stock of the components of the downstream level, and the value of the external parameter.
• FIG. 5 The following description relates to a particular variant of implementation, illustrated by FIG. 5.
• the use of the process allows a real adaptation of the supply of the places of consumption (work stations for the articles in manufacture or location in store for the finished products) according to the physical or administrative constraints.
• a Serving List system that is to say by the calculation of a quantity of components to be delivered, by breaking down the nomenclature of the compound.

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Applications Claiming Priority (3)

Publications (1)

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• 2001
  • 2001-08-28 FR FR0111181A patent/FR2829257B1/fr not_active Expired - Fee Related
• 2002
  • 2002-08-28 PL PL02373965A patent/PL373965A1/xx not_active Application Discontinuation
  • 2002-08-28 EP EP02796320A patent/EP1430434A1/de not_active Withdrawn
  • 2002-08-28 JP JP2003523424A patent/JP2005501344A/ja active Pending
  • 2002-08-28 KR KR10-2004-7002931A patent/KR20040037073A/ko not_active Application Discontinuation
  • 2002-08-28 WO PCT/FR2002/002953 patent/WO2003019435A1/fr active Application Filing
  • 2002-08-28 CA CA002458988A patent/CA2458988A1/fr not_active Abandoned
• 2004
  • 2004-02-11 MA MA27526A patent/MA26209A1/fr unknown
  • 2004-02-16 TN TNP2004000029A patent/TNSN04029A1/fr unknown
  • 2004-02-25 US US10/786,668 patent/US6970756B2/en not_active Expired - Fee Related

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