US 2012/0089489 A1Published application

Component safety inventory amount calculating method, program for executing same, and device for executing same

AssigneeHitachi, Ltd.

InventorsJun Tateishi, Junko Hosoda, Satoshi Fukushima

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Abstract

A device (100) for calculating the amount of safety inventory of a common component commonly used in products comprises a required-amount deviation calculating section (111) for determining the required-amount standard deviation of the common component using the demand standard deviation of each product, an integrated required-amount deviation calculating section (112) for determining the required-amount standard deviation of the common component of all the products as an integrated required-amount standard deviation using the required-amount standard deviation of the common component of each product, and a safety inventory amount calculating section (116) for determining the safety inventory amount of the common component using the integrated required-amount standard deviation. The integrated required-amount deviation calculating section (112) has a correlation coefficient calculating block (113) for determining a correlation coefficient representing the correlation among the required amounts of the common component of the products from the past records of the required amount of the common component of each product and a primary integrated required-amount standard deviation block (114) for determining an integrated required-amount standard deviation using the correlation coefficient and the required-amount standard deviation of the common component of each product.

Claims11

Dependent claims

A safety inventory amount calculation device for calculating a safety inventory amount of a common component used commonly in a plurality of products, comprising:

a receiving means, which receives a demand standard deviation concerning time variation of demand for each of the plurality of products, identification of components used in each of the plurality of products and respective numbers of the components used in the product in question, and time-dependent demand records for each of the plurality of products;
a storage means, which stores the demand standard deviation concerning the time variation of demand for each of the plurality of products, identification of the components used in each of the plurality of products and the respective numbers of the components, and the time-dependent demand records for each of the plurality of products as a result of the time variation, wherein the demand standard deviation, the identification and the respective numbers of the components, and the demand records have been received by the receiving means;
a deviation calculation means, which obtains a required-amount standard deviation of the common component for each of the plurality of products by using the number of the common component used in the product in question and the demand standard deviation for the product;
an integrated deviation calculation means, which:
obtains a required-amount record of the common component for each of the plurality of products based on the demand record of each of the plurality of product and the number of the common component used in each of the plurality of product;
obtains correlation coefficients indicating correlations between required-amounts of the common component for the plurality of products based on the required-amount records of the common component used in the plurality of products;
and obtains an integrated required-amount standard deviation (i.e. a required-amount standard deviation of the common component for all of the plurality of product, which is obtained by integrating the respective required-amount standard deviations) by using the correlation coefficients and the respective required-amount standard deviations of the common component for the plurality of products;
a safety inventory amount calculation means, which obtains a safety inventory amount of the common component by using the integrated required-amount standard deviation, and stores the safety inventory amount in the storage means;
and
an output means, which outputs the safety inventory amount of the common component.

7 more elements

A safety inventory amount calculation program for calculating a safety inventory amount of a common component used commonly in a plurality of products, wherein the safety inventory amount calculation program makes a computer execute:

a receiving step, in which an input means of the computer receives a demand standard deviation concerning time variation of demand for each of the plurality of products, identification of components used in each of the plurality of products and respective numbers of the components used in the product in question, and time-dependent demand records for each of the plurality of products;
and the demand standard deviation, the identification of the components used in each of the plurality of products and the respective numbers of the components and the demand records are stored in a storage means of the computer;
a deviation calculation step, in which a required-amount standard deviation of the common component for each of the plurality of products is obtained by using the number of the common component used in the product in question and the demand standard deviation for the product;
an integrated deviation calculation step, in which:
a required-amount record of the common component for each of the plurality of products is obtained based on the demand record of each of the plurality of product and the number of the common component used in each of the plurality of product;
correlation coefficients indicating correlations between required-amounts of the common component for the plurality of products are obtained based on the required-amount records of the common component used in the plurality of products;
and an integrated required-amount standard deviation (i.e. a required-amount standard deviation of the common component for all of the plurality of product, which is obtained by integrating the respective required-amount standard deviations) is obtained by using the correlation coefficients and the respective required-amount standard deviations of the common component for the plurality of products;
a safety inventory amount calculation step, in which a safety inventory amount of the common component is obtained by using the integrated required-amount standard deviation, and the safety inventory amount is stored in the storage means;
and
an output step, in which the safety inventory amount of the common component is outputted to an output means of the computer.

7 more elements

A safety inventory amount calculation method for calculating a safety inventory amount of a common component used commonly in a plurality of products, wherein a computer executes:

a receiving step, in which an input means of the computer receives a demand standard deviation concerning time variation of demand for each of the plurality of products, identification of components used in each of the plurality of products and respective numbers of the components used in the product in question, and time-dependent demand records for each of the plurality of products;
and the demand standard deviation, the identification of the components used in each of the plurality of products and the respective numbers of the components and the demand records are stored in a storage means of the computer;
a deviation calculation step, in which a required-amount standard deviation of the common component for each of the plurality of products is obtained by using the number of the common component used in the product in question and the demand standard deviation for the product;
an integrated deviation calculation step, in which:
a required-amount record of the common component for each of the plurality of products is obtained based on the demand record of each of the plurality of product and the number of the common component used in each of the plurality of product;
correlation coefficients indicating correlations between required-amounts of the common component for the plurality of products are obtained based on the required-amount records of the common component used in the plurality of products;
and an integrated required-amount standard deviation (i.e. a required-amount standard deviation of the common component for all of the plurality of product, which is obtained by integrating the respective required-amount standard deviations) is obtained by using the correlation coefficients and the respective required-amount standard deviations of the common component for the plurality of products;
a safety inventory amount calculation step, in which a safety inventory amount of the common component is obtained by using the integrated required-amount standard deviation, and the safety inventory amount is stored in the storage means;
and
an output step, in which the safety inventory amount of the common component is outputted to an output means of the computer.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/141,355Filed 22 Dec 2008
Published: 12 Apr 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G05B 19/41865
Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible…:…
G06Q 10/087
Logistics, e.g. warehousing, loading or distribution; Inventory or stock management: inventory or stock management, e.g. order filling,…
G06Q 10/08726
Using inventory planning: for replenishment processing, procedures, or recommendations using forecasting or optimisation
G05B 2219/31386
From computer integrated manufacturing till monitoring: determine size of batch of material for each process to meet mfl rate