KR20030016041A - quality control system and operation method for this system - Google Patents

Abstract

PURPOSE: A quality managing system and a method for managing the same are provided to reduce a defective proportion of each accessory by sharing information with respect to a quality control between a commodity selling company and a cooperated company in real time. CONSTITUTION: Quality control data of an accessory manufactured in the cooperated company are inputted in the cooperated company network(100). A database(200) stores basic numerical value information with respect to each accessory and accessory data according to each cooperated company with respect to quality evaluation details inputted from each cooperated company. A quality control network server(300) is linked with the database(200) and comprises a reliability verification unit(310) which compares quality control data with respect to each accessory inputted from the cooperated company network(100) with various data related to the corresponding accessory registered in the database(200) and performs a decision of a passing or rejection of an examination, and a notifying unit(320) which notifies the passing or rejection result contents decided by the reliability verification unit(310).

Description

Quality control system and operation method for this system

The present invention relates to a quality control system, and more particularly, to a quality control system using online and a method of operating the same, in which quality control of each accessory of a specific product produced by each supplier is automatically performed online. .

Companies selling ordinary home appliances and the like do not directly produce all the accessories of the above products, and subcontractors to various cooperative companies to supply each accessory, and then assemble and sell each of the supplied accessories.

For example, in the case of the refrigerator, considering that there are a lot of accessories necessary for its configuration, it is impossible for the vendor selling the refrigerator to manufacture all the accessories necessary for the configuration of the refrigerator by itself. To give.

Accordingly, the compatibility problem between each of the accessories has emerged as a very important matter, and the manufacturers and product distributors of each of the accessories have managed their quality according to a predetermined spec through their own quality control.

That is, as shown in FIG. 1, the supplier performs quality inspection for each inspection item by itself, and prepares a shipment inspection report using the results of the quality inspection. After the shipment of the accessory, the inspection certificate is submitted and the accessory is delivered.

Considering the above method, there are many kinds of accessories required for a typical product, and there are very few people to inspect these accessories. It is a method to perform quality control by simply reviewing the inspection report prepared by the relevant supplier without performing the retesting on other delivered parts except the accessories.

However, the above-described method does not have a separate process to prevent a mistake even if a mistake of a supplier or a deliberate manipulation of an inspection item is made. Input was a factor that raised the defective rate of the finished product.

In addition, as described above, only when a problem occurs in the assembled product due to the failure of extraction of the defective parts, the management of this problem is urgently required to supplement the overall quality control.

The present invention has been made to solve the problems caused by the quality control of the product as described above, the systematic quality control is possible to share the information on the quality management between the product seller and the supplier in real time through the online In addition, the purpose of the present invention is to provide a quality control system and its operation method that can minimize the defective rate for the quality control of each accessory through the reliability evaluation for the quality inspection proposed by the supplier.

1 is a state diagram schematically showing an operation process for quality control for each existing accessories

2 is a block diagram schematically showing the present invention quality management system

3 is a state diagram schematically showing an operation process of the present invention quality management system

Figure 4 is a flow chart schematically showing the operation of the present invention quality management system

5 is a flowchart illustrating an example of a process for verifying reliability during an operation process of the present quality management system.

Figure 6 is a state diagram showing the display state of the table for setting the degree of confidence during the operation of the quality management system of the present invention

7 is a flow chart showing an example for the management of the cooperative company during the operation process of the present invention quality management system

8A is a flowchart illustrating an example of a method of performing reliability verification of a CTQ inspection accessory during an operation of the present quality management system.

8B is a flowchart illustrating an example of a method of performing reliability verification of a CTQ unchecked accessory during an operation of the present quality management system.

9A is a flowchart illustrating an example of a process of organizing a CTQ non-testing accessory into a CTQ test accessory during an operation process of the present invention quality management system.

9B is a flowchart illustrating an example of a process of organizing a CTQ inspection accessory into a CTQ inspection-free accessory during the operation of the present quality management system.

Explanation of symbols for the main parts of the drawings

100. Network of Partners 200. database

300. Server network for quality control 310. Reliability Verifier

320. Notification unit 330. CTQ designator

400. Network of affiliates

According to an aspect of the present invention for achieving the above object, a network of a cooperative company that is built in at least one cooperative company that manufactures each accessory, the quality control information data of the accessory manufactured by the cooperative company is input; A database that stores reference numerical information on various accessories and accessory information for each supplier about the quality evaluation details inputted from each supplier; In connection with the database, the quality control information data of each accessory inputted from the network of the supplier and the various information data related to the accessory registered in the database are compared with each other to determine the pass / fail decision of the accessory. There is provided a quality management system including a reliability verification section for performing and a server network for quality control having a notification section for notifying the contents of the pass / fail result determined by the reliability verification section.

In addition, in order to achieve the above object, the method of operating the present invention quality management system requires each supplier to provide a field for each input target data related to the item of the accessory when a request for presentation of the quality inspection report for the accessory to be delivered is provided. A certificate report receiving step of displaying on the network of the cooperative company and requesting input of corresponding information; A reliability verification step of verifying the reliability of the input data by confirming whether there is a change in scatter map formed by the existing corresponding accessory data when the input of each data is completed; For the parts determined to pass through the reliability verification step, information on the contents allowing the shipment is sent, and for the accessories that do not pass the reliability verification, information that is not allowed to be shipped is transmitted to the network of the supplier. Determining whether or not to import (: 入): is characterized in that the operation proceeds sequentially.

Hereinafter, an embodiment of the present invention will be described in more detail with reference to the attached FIGS. 2 to 9B.

First, Figure 2 is a schematic diagram showing the overall configuration according to an embodiment of a quality management system according to the present invention.

That is, the quality management system according to an embodiment of the present invention largely includes a network 100 of each partner company, a database 200, and a server network 300 for quality management.

In this case, the network of the supplier 100 is a network established in at least one supplier manufacturing each accessory related to a specific product, and receives quality control information data for each accessory manufactured by the corresponding supplier. It serves to transmit to the server network 300 for quality management.

In addition, the database 200 stores reference numerical information on various accessories and information data of accessories for each supplier about the quality evaluation details input from each supplier.

In addition, the server network 300 for quality control is in a state of being associated with the database 200, and the quality management information data for each accessory and the database 200 inputted through the network 100 of a cooperative company. The reliability verification unit 310 compares various pieces of information data related to the corresponding accessory registered in the and performs the pass / fail decision of the accessory, and displays the contents of the pass / fail result determined by the reliability verification unit 310. It has a notification unit 320 for notifying the network 100 of the cooperative company.

At this time, the quality management server network 300 operates a site for performing a web service to collect, provide, and process various kinds of information online, and to notify the result of the work.

In addition, the server network 300 for quality control is built to further include a CTQ designation unit 330 for automatically performing a selective designation of the CTQ (Critical To Quality) inspection accessories and the quality evaluation no inspection accessories, The server network 400 of each related company that receives and uses the same accessories and is established online are connected to enable sharing of quality management information about the accessories.

Hereinafter, with reference to the state diagram of FIG. 3 and the flowchart of FIG. 4 illustrating an operation process according to the quality management system of the present invention described above will be described in more detail.

First, when a supplier producing one accessory of each accessory constituting a specific product completes the production of the accessory, a quality inspection of the finished accessory is performed by itself.

At this time, the item for performing the quality inspection follows the pre-arranged matters with the product seller.

In addition, the quality inspection report of the accessories for which quality inspection is completed through the above process is connected to a site operated by the server network 300 for quality control through the network 100 of a partner company, and then the server network 300 for quality control. Submissions are made by entering the relevant data into the data fields for each inspection item of the accessory to be presented.

At this time, the server for quality control network 300, when each supplier requests a presentation of a quality inspection for an accessory to be delivered, the data field of each input target item related to the item of the corresponding accessory is connected to the network of the supplier ( By receiving the display on the display 100 and requesting input of the corresponding information, the test report of the corresponding accessory is received (S110).

The server for quality control 300 obtains reference spec data for the accessory of the item from the database 200, compares the obtained data with the input data, and supplies the corresponding accessory to the accessory. It determines the pass or fail of the quality inspection for (S120).

In addition, the server for quality control network 300 transmits the information that is not released for the accessories determined as a result of the quality inspection to the network 100 of the partner company (S130), and determined to pass For the accessory, reliability verification of the input data can be performed.

At this time, the method for transmitting the information about the factory release to the supplier's network (100) using a conventional e-mail (e-mail), or the network of the supplier's network 100 for quality control server network (300) ), And display it on the screen to notify the user.

However, the process of determining the pass / fail of the quality inspection based on the data input before the reliability verification step as described above is necessary because the supplier performs only the quality inspection for the corresponding accessory and delivers only the accessories that have passed this quality inspection. Although not a process, it can be regarded as a necessary process considering that even a defective product may be delivered as a normal accessory due to a mistake of the supplier.

Meanwhile, when the quality inspection of the corresponding accessory is completed through the aforementioned processes, the server network 300 for quality control controls the reliability verification unit 310 to verify reliability of each input data for the accessory that has passed the quality inspection. (S140)

In the above method of verifying reliability, as shown in the flowchart of FIG. 5, data related to an existing corresponding accessory is stored by each data of the corresponding accessory inputted to the server network 300 for quality control through the network of the supplier 100. We present a method of verifying reliability by checking for changes in scatter plots.

That is, when each data for a particular accessory is input, an existing inspection certificate for the accessory of the corresponding item is obtained from the database 200, and then the input is performed using the calculation logic of the F test for the input data. It is to verify the reliability of the data.

At this time, the standard deviation (σ) or the process capacity (Z) management level of the distribution of the data for each item of the accessory is preferably agreed with each supplier in advance.

In addition, the calculation logic of the F test refers to the scattered data of each data related to the corresponding accessory inputted in advance, and the applied data according to the difference in the variation of the scattered chart which is changed when the respective data inputted from the current supplier is applied. As a method of testing the reliability of, it is mainly used in the techniques for the usual statistical quality control.

An example of this is briefly described with reference to Table 1 below.

sample Input data for accessories of pre-registered suppliers Data entered by the supplier through the inspection report Sample 1 80.4 80 Sample 2 78.2 81.2 Sample 3 80.1 79.5 Sample 4 77.1 78 Sample 5 79.6 76.1 Sample 6 80.4 77 Sample 7 81.6 80.1 Sample 8 79.9 79.9 Sample 9 84.4 78.8 Sample 10 80.9 80.8 Sample 11 83.1 Variance value (V) 4.153636 2.733778

First, the formula for variance values V1 and V2 is , The formula for calculating the F value using this variance is to be.

At this time, a larger value of V1 and V2 becomes a molecule, and has a degree of freedom of 1 (df1), and n is the number of samples.

That is, as shown in Table 1, the variance value of the existing input data for the accessory of the partner company registered in the database 200 is 4.153636, and the variance value of the data input through the inspection report is 2.733778 In this case, the F value is 1.5619376.

In addition, if the F value calculated through the above process is smaller than the rejection value corresponding to the degrees of freedom 1 and 2 degrees of freedom previously registered, it is determined that there is reliability, and on the contrary, the calculated F value is the rejection value. If greater, it is determined that there is no reliability.

However, in the above process, the rejection value is not limited to being set to have only one value for a specific degree of freedom 1 and degree of freedom 2.

That is, the quality level of the accessories desired by the product distributor may be different, and each rejection value may be different depending on the importance of the accessories.

Accordingly, in the present invention, the person in charge of the product sales company who receives the accessory in the process of detecting the rejection value is inputted directly from the cooperative company according to the entered trust degree by directly inputting the degree of trust of the input data for the accessory. It is suggested that by changing the variation allowable range of the data, you can obtain the accessories of the desired quality level.

6, the degree of confidence required by the person in charge of the product sales company is entered in the error rate entry column activated in the table, and the corresponding rejection value according to the degree of trust is stored in the database 200. You can do this by entering it in advance.

That is, when the person in charge is a value of degrees of freedom 1 and degrees of freedom 2 and inputs an error rate value according to the degree of trust, the server network 300 for quality control extracts a rejection value corresponding to the error rate from the database 200. To display on the table.

For example, to apply a confidence level of 95% (error rate 5), write 5 in the error rate input field on the table or select 5 from a combo box (drop-down list) for selecting an application rate.

As a result, when reliability verification is completed through the above-described process, after determining whether to allow or release the corresponding accessories according to the completed result, the contents of the notification are notified to the partner's network, and the corresponding accessories are delivered.

In other words, for the accessories determined to pass through the reliability verification step, information on the contents of the contents allowed to be released for the accessories, and for the accessories determined to fail due to the failure of passing the reliability verification, the information of the supplier's network By notification (S150, S160) will determine whether to import the corresponding accessories (收入).

At this time, the method for notifying the network 100 of the cooperative company about the permission or disallow of the release is a delivery table for the release instruction from the notification unit 320 constituting the server network 300 for quality control. By issuing and notifying the partner network 100 using e-mail or the like.

In addition, in the present invention, when the quality control server network 300 performs the above-described reliability verification, when the number of rejection determinations for the accessory determined to fail is more than a preset limit, the manufacturer (partner) of the accessory is selected. By automatically designating and registering as a management target company, it can be used as a material for managing a poor supplier. Details of this are as shown in the flowchart of FIG. 7.

On the other hand, the process of verifying the reliability of the operation process according to the quality management system of the present invention is not limited to being performed using the F test.

In other words, the reliability of the input data can be confirmed by using the mean test (T test) between the input data and the measured data, or a worker, a machine or a machine, a material, a method of work, etc. The reliability of the input data can also be confirmed by changing the scatter diagram according to whether or not the 4M is changed.

In this case, the method for confirming whether or not the data is manipulated according to the change of the 4M has no change in the distribution despite the change in the 4M or no change in the 4M, but there is a change in the distribution. There is a method for determining whether the input data is manipulated through an offline test by determining that the reliability is low.

In addition, the present invention suggests that the reliability verification method for each object is set differently in consideration of the fact that the type of a conventional critical to quality (CTQ) accessory is divided into a CTQ test accessory and a CTQ non-test accessory.

That is, if the accessory that passed the quality inspection is an accessory designated as a CTQ inspection object or an accessory designated as a CTQ non-inspection object, and is the CTQ inspection accessory, the corresponding product measured by the product distributor as shown in FIG. 8A is shown. Based on each data value of the accessory and each data value of the corresponding accessory suggested by the supplier, reliability verification using F test, T test, and 4M change confirmation is performed. Reliability verification is performed using the F test, the T test, and the 4M change check based on the data of the existing accessories registered in the base 200 and the respective data values of the accessories presented by the supplier.

However, the reliability verification for the CTQ test accessory and the CTQ non-test accessory as described above may not necessarily proceed by simultaneously performing the F test, the T test, and the 4M change check.

For example, the CTQ test accessory may perform the reliability verification described above by performing only the T test and the 4M change check process, and the CTQ non-test accessory only the F test and the 4M change check process.

In addition, the pass and fail determination for each test of the CTQ inspection accessory uses a Z value, and the pass and fail determination for each test of the CTQ inspection accessory uses a reference spec value.

However, for more accurate reliability verification, it is more preferable to perform all of the T test, the F test, and the 4M change check as described above.

Meanwhile, in the present invention, the process of combining the CTQ inspection accessory into the CTQ unchecked accessory or the CTQ inspection accessory into the CTQ inspection accessory among the processes described above is controlled by the server network 300 for quality management. It is further suggested that it can be done automatically.

In this case, the operation process of the server network 300 for quality control for automatically organizing the CTQ non-test accessory into the CTQ test accessory does not satisfy the standard through the distribution query of the reliability verification step as shown in FIG. 9A. If it fails (for example, if the accessory quality level of 30 lots for 6 months does not meet 6σ, or if the last Z value of the CTQ non-tested accessory drops continuously over a certain lot) It is organized automatically.

If the CTQ inspection accessory satisfies the above criteria through the distribution management, the accessory is automatically organized into the CTQ inspection-free accessory through a separate approval process as shown in FIG. 9B.

In addition, when the CTQ non-examination accessory is organized into the CTQ inspection accessory as described above, the facts thereof should be notified to the network of the supplier producing the accessory so that mutual agreement can be made.

In other words, it is more preferable that the CTQ non-tested accessory be judged due to a valid reason of a supplier or a reason that is separately recognized.

Accordingly, in the present invention, when the details for the CTQ inspection accessory to be organized into the CTQ inspection accessory occurs, it is proposed to notify the partner company an e-mail requesting the agreement to the CTQ inspection accessory, the consultation method is quality control After the server network 300 accesses the site operated by confirming the details and propose to proceed with the consultation.

At this time, if the partner company opposes the formation of the CTQ inspection accessory, the reason for making the return is made and registered so that the final decision can be made.

If, in the above process, the arrangement for the CTQ inspection accessory is not agreed for a specific reason, the relevant information is excluded from the CTQ inspection accessory, and related information is registered in the database 200.

On the other hand, the quality management system of the present invention as described above does not necessarily have to be built in a specific product distributor, and a separate service provider builds the quality control system online, and is produced from each partner in this quality management system. The network of product distributors using various accessories that are connected can be operated to be shared and used, as well as the same accessories produced from each supplier as a specific product vendor has built the quality control system of the present invention. It may be said to be a useful invention, such as may be operated to share the quality management information for each relevant server network 400 and the corresponding accessories that are used to deliver.

As described above, according to the quality management system and its operating method according to the present invention, the quality sharing between the product seller and the supplier is carried out in real time through online, so that systematic quality management is possible. As a result, the loss of physical resources can be reduced.

In addition, the present invention has the advantage of reducing the defective rate of the final finished product by preventing the process of introduction of defective accessories through the evaluation of the reliability of the test report presented by the supplier.

Claims (20)

A network of suppliers built in at least one supplier that manufactures each accessory, into which quality control information data of the accessory manufactured by the supplier is input; A database that stores reference numerical information on various accessories and accessory information for each supplier about the quality evaluation details inputted from each supplier; In connection with the database, the quality control information data of each accessory inputted from the network of the supplier and the various information data related to the accessory registered in the database are compared with each other to determine the pass / fail decision of the accessory. And a server network for quality control having a reliability verification unit for performing and having a notification unit for notifying the contents of the pass / fail result determined by the reliability verification unit. The method of claim 1, Server network for quality control Critical To Quality (CTQ) A quality management system further comprising a CTQ designation for performing object changes to the inspection accessory and the quality assessment unchecked accessory. The method of claim 1, Server network for quality control Quality management system, characterized in that the network connected to each of the affiliated companies using the same accessories delivered and used to share quality control information for the accessories. If each supplier requests the presentation of a quality inspection report for an upcoming accessory, a certificate report requesting the entry of the information is displayed by displaying on the supplier's network a field for each entry target data relating to the item of the accessory. step; A reliability verification step of verifying the reliability of the input data by confirming whether a change in the scatter map formed by existing corresponding accessory data is out of a setting range when the input of each data is completed; For the parts determined to pass through the reliability verification step, information on the contents allowing the shipment is sent, and for the accessories that do not pass the reliability verification, information that is not allowed to be shipped is transmitted to the network of the supplier. A method of operating a quality control system, characterized in that the step of determining whether or not to import: is operated online. The method of claim 4, wherein Before performing the reliability verification step Comparing the various data inputted from the cooperative company with reference data of the corresponding accessory pre-stored in the database and performing a pass or fail determination of the quality inspection; For the accessories determined as a result of the quality inspection, transmitting the information that is not released to the network of the partner company, and controls to perform the reliability verification for the accessories determined to pass: The operating method of the quality management system characterized by. The method of claim 4, wherein The reliability verification stage A method of operating a quality control system, characterized by further comprising the step of checking whether the input data is distorted through the average test (T test) between the input data and the measurement data. The method of claim 4, wherein The reliability verification stage The process includes checking whether or not the input data is distorted by checking whether the scatter diagram changes due to 4M changes such as man, machine, machine, material, method, etc. A method of operating a quality control system, characterized in that. The method of claim 7, wherein How to check whether the data has been manipulated according to the change of 4M The method of operating a quality control system, characterized in that whether the input data is manipulated by performing an offline inspection when the change of the distribution does not deviate from the set range despite the change of the 4M. The method of claim 7, wherein How to check whether the data has been manipulated according to the change of 4M If there is no change of the 4M but the change of the distribution is out of the set range, the operation of the quality control system characterized in that to check the operation of the input data by performing an offline inspection. The method of claim 4, wherein The variation of the data for a particular accessory is outside the set range. The method of operating a quality control system, characterized in that to check whether the input data through the offline inspection has been manipulated, and to determine whether the corresponding accessory is passed according to the distortion of the data. The method of claim 4, wherein Quality control, characterized in that the operation further includes the step of automatically designating the manufacturer of the accessory as a management target if the number of rejection determination of the accessory determined to fail through the reliability verification step more than the preset limit How the system works. The method of claim 4, wherein In the reliability verification phase If the CTQ (Critical To Quality) inspection accessory is continuously within the standard range for more than a predetermined lot by checking the change of Z value through the scatter management, the step includes configuring the accessory as a CTQ inspection-free accessory. A method of operating a quality control system, characterized in that. The method of claim 4, wherein In the reliability verification phase When the latest Z value of the CTQ (Critical To Quality) non-tested accessory is continuously dropped more than a predetermined lot by checking the change of Z value through scatter management, the step of configuring the accessory as a Critical To Quality (CTQ) test accessory Operating method of the quality management system, characterized in that it further comprises. The method according to claim 12 or 13, If you want to organize a CTQ inspection accessory as a CTQ inspection accessory And a step of mutually agreeing by notifying a network of a supplier producing the accessory to the CTQ inspection target of the accessory and mutually agreeing. The method of claim 14, If the arrangement into the CTQ inspection accessory is not agreed for a specific reason, the method further comprises the step of organizing the accessory into the CTQ inspection-free accessory. The method according to claim 12 or 13, Inspection of CTQ inspection accessories A method of operating a quality control system, comprising a verification process such as import inspection data and mean value test (T test) and a 4M change for a predetermined lot. The method according to claim 12 or 13, Inspection for CTQ Unchecked Accessories A method of operating a quality management system, including a scatter test (F test) of each data input from a supplier. The method of claim 17, Inspection for CTQ Unchecked Accessories A method of operating a quality control system, which further includes verification of 4M changes such as man, machine, machine, material, and method. The method of claim 4, wherein A method of operating a quality control system, characterized in that it further comprises a step of agreeing with each supplier a standard deviation (σ) or process capability (Z) value for determining the scatter of the data for each item. The method of claim 4, wherein In the reliability verification phase Wherein the supplier receiving the accessory directly inputs the degree of confidence of the input data for the accessory, and changes the distribution variation allowance range of the input data according to the entered degree of trust. How the management system operates.