Sewing management system and sewing management method

Abstract

A sewing management system (1) comprises: a normal work time calculation unit (61) that calculates a normal work time indicating the time required for a normal work in which a worker sews a sewing object (100) by using a sewing machine (2); a correction work time calculation unit (62) that calculates a correction work time indicating the time required for a correction work in which the worker corrects the sewing object (100) after the normal work by using the sewing machine; and an output unit (64) that outputs the normal work time and the correction work time.

Description

Sewing management system and sewing management method

[0001] The present disclosure relates to a sewing management system and a sewing management method.

[0002] In the technical field related to the stitching management system, a stitching management system such as that disclosed in Japanese Patent Application Laid-Open No. 2003-122266 is known.

[0003] Japanese Patent Application Publication No. 2020-168056

[0004] The sewing object sewn in the sewing process is inspected in the inspection process. If a defect is found in the inspection process, the sewing object is returned to the sewing process for correction. In order to properly plan the production of sewn products, it is necessary to understand the time required for correction work.

[0005] The present disclosure aims to appropriately plan the production of sewn products.

[0006] The sewing management system according to the present disclosure includes a normal work time calculation unit that calculates a normal work time indicating the time required for a worker to perform normal work of sewing a sewing object using a sewing machine, a correction work time calculation unit that calculates a correction work time indicating the time required for a worker to perform correction work using a sewing machine to correct the sewing object after the normal work has been performed, and an output unit that outputs the normal work time and the correction work time.

[0007] According to the sewing management system according to the present disclosure, a production plan for sewn products can be properly made.

[0008] Fig. 1 is a diagram schematically showing a sewing management system according to an embodiment. Fig. 2 is a hardware configuration diagram showing a management controller according to an embodiment. Fig. 3 is a functional block diagram showing a management device and a sewing machine according to an embodiment. Fig. 4 is a flowchart showing a sewing management method according to an embodiment. Fig. 5 is a diagram showing an example of display data displayed on a display device according to an embodiment.

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings, but the present disclosure is not limited to the embodiments. The components of the embodiments described below can be combined as appropriate. In addition, some components may not be used.

[0010] [Sewing Management System] FIG. 1 is a diagram schematically illustrating a sewing management system 1 according to an embodiment. The sewing management system 1 includes a management device 3 that manages a production process of a sewn product. The production process includes a sewing process in which a sewing object 100 is sewn using a sewing machine 2, and an inspection process in which the sewing object 100 sewn in the sewing process is inspected. The sewing machine 2 is an industrial sewing machine. The sewn product is produced in a production line that includes the sewing machine 2. A plurality of sewing machines 2 are installed in the production line. The production line is installed in a sewing factory. The sewing machines 2 operate in the sewing factory. The sewing object 100 is sewn by the sewing machine 2, thereby producing a sewn product. In the embodiment, the management device 3 is installed in the sewing factory. Note that the management device 3 may be installed outside the sewing factory.

[0011] In the sewing process, a sewing object 100 is sewn by a sewing machine 2 to produce a sewn product. An example of the sewing object is fabric. An example of the sewn product is clothing.

[0012] A sewing factory is equipped with multiple types of sewing machines 2 according to their intended use. A sewing factory is equipped with multiple types of sewing machines 2 corresponding to the multiple sewing processes for producing sewn products. Examples of the types of sewing machines 2 include a lockstitch sewing machine for sewing together body parts, a button sewing machine for attaching buttons to body parts, and a pocket sewing machine for attaching pockets to body parts. Many types of sewing machines 2 are installed in one sewing factory. For ease of explanation, three sewing machines 2 are shown in FIG. 1. A first sewing machine 2A is used in a first process for producing sewn products. A second sewing machine 2B is used in a second process for producing sewn products. A third sewing machine 2C is used in a third process for producing sewn products. A sewing factory may be equipped with multiple sewing machines 2 of the same type.

[0013] A manager, workers, and inspectors work in a sewing factory. The manager manages the workers, inspectors, and sewing machine 2. The workers sew the sewing object 100 using the sewing machine 2 in the sewing process. The inspectors inspect the sewing object 100 sewn by the sewing machine 2 in the inspection process. Each of the manager, workers, and inspectors may be considered to be a user of the sewing machine 2. The manager may be one person or multiple people. The workers may be one person or multiple people. For example, one worker may operate multiple sewing machines 2. The inspectors may be one person or multiple people.

[0014] The management device 3 has a display device 4, an input device 5, and a management controller 6. The display device 4 displays display data. The display device 4 includes a flat panel display such as a liquid crystal display or an organic EL display. The input device 5 generates input data when operated by an administrator. The input device 5 may be operated by a worker or an operator. The input device 5 includes a touch panel (touch sensor) arranged on the display screen of the display device 4. The input device 5 may be a computer keyboard, a mouse, or a voice input device. The management controller 6 includes a computer system. The management controller 6 has at least one processor and a main memory that stores computer programs executable by the processor.

[0015] The sewing machine 2 has an operation panel 7, a sewing machine controller 8, an identification device 9, and a wireless communication device 10. The operation panel 7 generates operation data when operated by an operator. The operation panel 7 includes a touch panel (touch sensor) arranged on the display screen of the display. The sewing machine controller 8 includes a computer system. The sewing machine controller 8 has at least one processor and a main memory that stores computer programs executable by the processor.

[0016] The identification device 9 identifies identification tags (101, 102) attached to the sewing object 100. The identification device 9 outputs identification data indicating the identification results of the identification tags (101, 102). The identification tags (101, 102) are attached to the sewing object 100 to identify the sewing object 100. The identification tags (101, 102) are detachable from the sewing object 100. Examples of the identification tags (101, 102) include RFID tags or two-dimensional code tags on which a two-dimensional code is printed. Examples of the identification device 9 include an RFID reader or a two-dimensional code reader.

[0017] An inspector inspects the sewing object 100 in the inspection process. The inspection of the sewing object 100 includes an intermediate inspection in which the sewing object 100 has undergone some of the sewing processes, and a final inspection in which the sewing object 100 has undergone all of the sewing processes. The inspector carries an information terminal 11. Examples of the information terminal 11 include a tablet terminal or a smartphone. The information terminal 11 includes a display, an input device such as a touch panel, and a computer system.

[0018] The management device 3 is shared by a plurality of sewing machines 2 and information terminals 11 in a sewing factory. The number of management devices 3 is smaller than the number of sewing machines 2. The management device 3 is capable of communicating with each of the sewing machines 2 and the information terminals 11. The management controller 6 of the management device 3 communicates with each of the sewing machine controllers 8 of the sewing machines 2 and the information terminals 11. The management controller 6, sewing machine controller 8, and information terminal 11 communicate wirelessly. The management controller 6, sewing machine controller 8, and information terminal 11 communicate wirelessly via a local area network (LAN). An example of a wireless LAN is Wi-Fi (registered trademark). The management controller 6, sewing machine controller 8, and information terminal 11 may also communicate wirelessly via a personal area network (PAN). An example of a wireless PAN is Bluetooth (registered trademark).

[0019] The management controller 6 transmits a control command to the sewing machine controller 8 of the sewing machine 2 based on input data generated by operating the input device 5 .

[0020] The sewing machine controller 8 transmits operation data of the sewing machine 2 to the management controller 6 via the wireless communication device 10. The operation data of the sewing machine 2 includes operating conditions of the sewing machine 2. The operating conditions of the sewing machine 2 include stitch length, stitch pitch, stitch pattern, feed speed of the sewing object, number of stitches, thread tension, and presser foot pressure on the sewing object. The sewing machine controller 8 monitors the operating conditions of the sewing machine 2. The sewing machine 2 is provided with a sensor that detects the operating conditions of the sewing machine 2. Examples of the sensor include a tension sensor that detects thread tension and a presser foot pressure sensor that detects presser foot pressure on the sewing object. The sewing machine controller 8 can monitor the operating conditions of the sewing machine 2 by acquiring the detection data of the sensor. The sewing machine 2 also has a sewing machine motor for operating the needle bar and thread take-up. The sewing machine controller 8 can monitor the operating conditions of the sewing machine 2 by acquiring a drive signal of the sewing machine motor. The operation data of the sewing machine 2 also indicates the operating history of the sewing machine 2. The operation history of the sewing machine 2 includes at least one of the operation date and time of the sewing machine 2, the continuous operation time of the sewing machine 2, the cumulative operation time of the sewing machine 2, the type of sewing object sewn by the sewing machine 2, the number of stitches during sewing, error information that occurred in the sewing machine 2, and the operator who operated the sewing machine 2.

[0021] The sewing machine controller 8 transmits to the management controller 6 identification data indicating the result of identification of the identification tag (101, 102) by the identification device 9.

[0022] The management controller 6 collects operation data of each of the plurality of sewing machines 2. The management controller 6 causes the display device 4 to display the operation data of each of the plurality of sewing machines 2.

[0023] The inspector operates the input device of the information terminal 11 to input the inspection results of the sewing object 100 to the information terminal 11. The information terminal 11 transmits inspection data indicating the inspection results of the sewing object 100 to the management controller 6.

[0024] The management controller 6 transmits guidance data indicating the inspection items and inspection methods for the sewing object 100 to the information terminal 11. The guidance data is displayed on the display of the information terminal 11. The inspector inspects the sewing object 100 while checking the guidance data displayed on the display.

[0025] [Computer System] FIG. 2 is a hardware configuration diagram showing a management controller 6 according to an embodiment. The management controller 6 includes a computer system 1000. The computer system 1000 includes a processor 1001 such as a CPU (Central Processing Unit), a main memory 1002 including a nonvolatile memory such as a ROM (Read Only Memory) and a volatile memory such as a RAM (Random Access Memory), a storage 1003, and an interface 1004 including an input / output circuit. The functions of the management controller 6 are stored in the storage 1003 as a computer program. The processor 1001 reads the computer program from the storage 1003, loads it into the main memory 1002, and executes processing in accordance with the computer program. The computer program may be distributed to the computer system 1000 via a network.

[0026] Similarly, each of the sewing machine controller 8 and the information terminal 11 includes a computer system having a processor, a main memory, a storage, and an interface.

[0027] 3 is a functional block diagram showing the management device 3 and the sewing machine 2 according to an embodiment. As shown in FIG. 3, the management controller 6 has a normal operation time calculation unit 61, a corrected operation time calculation unit 62, an operation data acquisition unit 63, and an output unit 64.

[0028] The normal work time calculation unit 61 calculates normal work time, which indicates the time required for a worker to perform normal work of sewing the sewing object 100 using the sewing machine 2. The normal work time calculation unit 61 calculates the normal work time for each of the multiple sewing machines 2. The normal work time corresponds to what is called standard time. Normal work time (standard time) refers to the time required when working using optimal methods and conditions. Standard time includes work time and slack time. Work time refers to the time required when a worker with standard proficiency works using standard work procedures, methods, and conditions. Slack time refers to additional time that appears irregularly or accidentally when performing work, and time that compensates for production declines due to other factors. The normal work time may be the cumulative value of normal work time for one sewing machine 2.

[0029] The correction work time calculation unit 62 calculates a correction work time indicating the time required for a worker to perform correction work using the sewing machine 2 to correct the sewing object 100 after normal work has been performed. If there are multiple sewing machines 2 performing correction work, the correction work time calculation unit 62 calculates the correction work time for each of the multiple sewing machines 2. The correction work time corresponds to the standard time required for correction. The correction work time may be a cumulative value of the correction work time for one sewing machine 2.

[0030] The operation data acquisition unit 63 acquires operation data transmitted from the sewing machine controller 8 of the sewing machine 2. The operation data acquisition unit 63 acquires operation data of each of the plurality of sewing machines 2.

[0031] The output unit 64 outputs the normal work time calculated by the normal work time calculation unit 61 and the corrected work time calculated by the corrected work time calculation unit 62. In the embodiment, the output unit 64 outputs the normal work time and the corrected work time to the display device 4.

[0032] [Calculation of normal work time] When normal work is performed on the sewing object 100, an identification tag 101 is attached to the sewing object 100. The identification tag 101 is attached to the sewing object 100 to identify the sewing object 100 on which normal work is performed. In the following description, the identification tag 101 attached to the sewing object 100 to identify the sewing object 100 on which normal work is performed will be referred to as the normal tag 101 as appropriate.

[0033] When normal work is started on the sewing object 100, the normal tag 101 is identified by the identification device 9. When starting normal work on the sewing object 100, the worker operates the start button provided on the operation panel 7 and causes the identification device 9 to read the normal tag 101 attached to the sewing object 100. After the identification device 9 reads the normal tag 101, the worker starts normal work. The worker carries out setup for sewing the sewing object 100 and sews the sewing object 100 using the sewing machine 2. After the normal work is completed, the worker operates the end button provided on the operation panel 7 and causes the identification device 9 to read the normal tag 101 attached to the sewing object 100 again.

[0034] The sewing machine controller 8 transmits to the management controller 6 operation data generated by operating the operation panel 7 and first identification data indicating the identification data of the regular tag 101 by the identification device 9. The management controller 6 receives the operation data generated by operating the start button on the operation panel 7, the first identification data of the regular tag 101 read into the identification device 9 at the start of regular work, the operation data generated by operating the end button on the operation panel 7, and the first identification data of the regular tag 101 read into the identification device 9 at the end of regular work.

[0035] The normal work time calculation unit 61 calculates the normal work time based on the first identification data when the identification device 9 identifies the normal tag 101. The normal work time calculation unit 61 can calculate the normal work time based on the first identification data of the normal tag 101 read into the identification device 9 at the start of the normal work and the first identification data of the normal tag 101 read into the identification device 9 at the end of the normal work. In other words, the normal work time calculation unit 61 can calculate the normal work time based on the difference between the time when the normal tag 101 is read into the identification device 9 together with the operation of the start button on the operation panel 7 and the time when the normal tag 101 is read into the identification device 9 together with the operation of the end button on the operation panel 7.

[0036] The normal work time is calculated for each of the first process (first sewing machine 2A), the second process (second sewing machine 2B), and the third process (third sewing machine 2C).

[0037] The normal work time calculation unit 61 may calculate the normal work time based on the operation data acquired by the operation data acquisition unit 63. As described above, the operation data of the sewing machine 2 includes the operating conditions of the sewing machine 2. The operating conditions of the sewing machine 2 include the drive time of the sewing machine motor. The normal work time calculation unit 61 may calculate the drive time of the sewing machine motor during normal work as the normal work time.

[0038] [Calculation of correction work time] After normal work has been performed, the sewing object 100 is inspected by an inspector in the inspection process. If a defect is found in the sewing object 100 in the inspection process, it is returned to the sewing process and correction work is carried out. When correction work is carried out on the sewing object 100, an identification tag 102 is attached to the sewing object 100. The sewing object 100 with the identification tag 102 attached is returned to the sewing process. The identification tag 102 is attached to the sewing object 100 in order to identify the sewing object 100 that will be corrected. In the following description, the identification tag 102 attached to the sewing object 100 in order to identify the sewing object 100 that will be corrected will be referred to as the correction tag 102 as appropriate.

[0039] For example, if a defect caused by work in the first process is found, the sewing object 100 with the correction tag 102 attached is returned to the first process (first sewing machine 2A). If a defect caused by work in the second or third process is found, the sewing object 100 with the correction tag 102 attached is returned to the second process (second sewing machine 2B) or the third process (third sewing machine 2C). Figure 1 shows an example in which the sewing object 100 with the correction tag 102 attached is returned to the second process (second sewing machine 2B).

[0040] When correction work is started on the sewing object 100, the correction tag 102 is identified by the identification device 9. When starting correction work on the sewing object 100, the worker operates a start button provided on the operation panel 7 and causes the identification device 9 to read the correction tag 102 attached to the sewing object 100. After the correction tag 102 is read into the identification device 9, the worker starts the correction work. The worker carries out setup for correcting the sewing object 100, or corrects the sewing object 100 using the sewing machine 2. After the correction work is completed, the worker operates an end button provided on the operation panel 7 and causes the identification device 9 to read again the correction tag 102 attached to the sewing object 100.

[0041] The sewing machine controller 8 transmits to the management controller 6 the operation data generated by operating the operation panel 7 and second identification data indicating the identification data of the correction tag 102 by the identification device 9. The management controller 6 receives the operation data generated by operating the start button on the operation panel 7, the second identification data of the correction tag 102 read into the identification device 9 at the start of the correction work, the operation data generated by operating the end button on the operation panel 7, and the second identification data of the correction tag 102 read into the identification device 9 at the end of the correction work.

[0042] The correction work time calculation unit 62 calculates the correction work time based on the second identification data when the identification device 9 identifies the corrected tag 102. The correction work time calculation unit 62 can calculate the correction work time based on the second identification data of the corrected tag 102 read into the identification device 9 at the start of the correction work and the second identification data of the corrected tag 102 read into the identification device 9 at the end of the correction work. In other words, the correction work time calculation unit 62 can calculate the correction work time based on the difference between the time when the corrected tag 102 is read into the identification device 9 together with the operation of the start button on the operation panel 7 and the time when the corrected tag 102 is read into the identification device 9 together with the operation of the end button on the operation panel 7.

[0043] When there are a plurality of sewing processes (sewing machines 2) in which correction work is performed, the correction work time is calculated for each of the plurality of sewing processes (sewing machines 2).

[0044] The correction work time calculation unit 62 may calculate the correction work time based on the operation data acquired by the operation data acquisition unit 63. As described above, the operation data of the sewing machine 2 includes the operating conditions of the sewing machine 2. The operating conditions of the sewing machine 2 include the drive time of the sewing machine motor. The correction work time calculation unit 62 may calculate the drive time of the sewing machine motor during the correction work as the correction work time.

[0045] [Sewing Management Method] Figure 4 is a flowchart showing a sewing management method according to an embodiment. The normal work time calculation unit 61 determines whether or not it has received the first identification data from the normal tag 101 (step S1). If it is determined in step S1 that it has received the first identification data (step S1: Yes), the normal work time calculation unit 61 calculates the normal work time based on the first identification data (step S2). The first identification data is transmitted from the sewing machine controller 8 to the management controller 6 at the start and end of the normal work. The normal work time calculation unit 61 can calculate the normal work time based on the first identification data received at the start and end of the normal work.

[0046] The correction work time calculation unit 62 determines whether or not it has received the second identification data of the correction tag 102 (Step S3). If it is determined in Step S3 that it has received the second identification data (Step S3: Yes), the correction work time calculation unit 62 calculates the correction work time based on the second identification data (Step S4). The second identification data is transmitted from the sewing machine controller 8 to the management controller 6 at the start and end of the correction work. The correction work time calculation unit 62 can calculate the correction work time based on the second identification data received at the start of the correction work and the second identification data received at the end of the correction work.

[0047] The output unit 64 generates output data based on the normal work time calculated in step S2 and the corrected work time calculated in step S4 (step S5). The output unit 64 outputs the output data to the display device 4 (step S6). In this embodiment, the output data includes display data to be displayed on the display device 4.

[0048] If it is determined in step S1 that the first identification data has not been received (step S1: No), the output data is generated without calculating the normal operation time.If it is determined in step S3 that the second identification data has not been received (step S3: No), the output data is generated without calculating the correction operation time.

[0049] 5 is a diagram showing an example of display data displayed on the display device 4 according to the embodiment. As shown in FIG. 5, the output unit 64 causes the display device 4 to display the normal work time and the correction work time. In the example shown in FIG. 5, the output unit 64 causes the display device 4 to display a bar graph showing the relationship between the normal work time and the correction work time. The manager can recognize the relationship between the normal work time and the correction work time based on the display data displayed on the display device 4.

[0050] The output unit 64 causes the display device 4 to display the normal work time and the correction work time for each of the multiple sewing machines 2. Based on the display data displayed on the display device 4, the manager can recognize the relationship between the normal work time and the correction work time for each of the multiple sewing machines 2.

[0051] The output unit 64 may display the normal work time and the correction work time on the display device 4 for each of a plurality of workers.

[0052] [Effects] As described above, according to the embodiment, the sewing management system 1 includes a normal work time calculation unit 61 that calculates a normal work time indicating the time required for the normal work of an operator sewing the sewing object 100 using the sewing machine 2, a correction work time calculation unit 62 that calculates a correction work time indicating the time required for the operator to perform correction work using the sewing machine 2 to correct the sewing object 100 after the normal work has been performed, and an output unit 64 that outputs the normal work time and the correction work time. Since not only the time required for the normal work but also the time required for the correction work is calculated, the manager can recognize the total work time including the normal work time and the correction work time. The manager can recognize the proportion of the correction work time in the total work time. This allows the manager to appropriately plan the production of sewn products.

[0053] A normal tag 101 for identifying the sewing object 100 on which normal work is performed is attached to the sewing object 100. A correction tag 102 for identifying the sewing object 100 on which correction work is performed is attached to the sewing object 100. The sewing machine 2 has an identification device 9 that identifies the normal tag 101 and the correction tag 102. The normal work time calculation unit 61 can calculate the normal work time based on first identification data obtained when the identification device 9 identifies the normal tag 101. The correction work time calculation unit 62 can calculate the correction work time based on second identification data obtained when the identification device 9 identifies the correction tag 102. Furthermore, the normal tag 101 and the correction tag 102 each include product number data of the sewing object 100, and display data showing the relationship between the product number, the normal work time, and the correction work time is displayed on the display device 4, allowing the administrator to manage the normal work time and the correction work time for each product number.

[0054] A plurality of sewing machines 2 are provided. The output unit 64 displays the relationship between normal work time and correction work time on the display device 4 for each of the plurality of sewing machines 2. The manager can manage the normal work time and correction work time for each sewing machine 2. Furthermore, by displaying the relationship between normal work time and correction work time for each of the plurality of workers on the display device 4, the manager can manage the normal work time and correction work time for each worker. The manager can judge the ability of each worker and determine the worker's remuneration based on the relationship between the worker's normal work time and correction work time. The manager may determine that the shorter the correction work time, the higher the worker's ability. The manager may also increase the worker's remuneration for each of the workers with shorter correction work time.

[0055] In the above-described embodiment, the correction work time calculation unit 62 may calculate the frequency of correction work in a predetermined period (for example, one day or one week). The correction work time calculation unit 62 may calculate the frequency of correction work for each sewing machine 2 or for each worker.

[0056] In the above-described embodiment, at the start of normal work and correction work, the start button on the operation panel 7 is operated and the identification tag (101, 102) is read by the identification device 9, and at the end of normal work and correction work, the end button on the operation panel 7 is operated and the identification tag (101, 102) is read by the identification device 9. It is only necessary for the management controller 6 to recognize the start and end of normal work and correction work, and the operation panel 7 does not need to be operated.

[0057] The present disclosure includes the following aspects: (1) A sewing management system comprising: a normal work time calculation unit that calculates a normal work time indicating a time required for normal work of an operator sewing a sewing object using a sewing machine; a correction work time calculation unit that calculates a correction work time indicating a time required for correction work of the operator using the sewing machine to correct the sewing object after the normal work has been performed; and an output unit that outputs the normal work time and the correction work time. (2) The sewing management system described in (1), wherein a normal tag for identifying the sewing object for which the normal work is performed is affixed to the sewing object, and a correction tag for identifying the sewing object for which the correction work is performed is affixed to the sewing object, the sewing machine has an identification device that identifies the normal tag and the correction tag, the normal work time calculation unit calculates the normal work time based on first identification data when the identification device identifies the normal tag, and the correction work time calculation unit calculates the correction work time based on second identification data when the identification device identifies the correction tag. (3) The sewing management system according to (1), wherein a plurality of the sewing machines are provided, and the output unit displays the normal work time and the correction work time on a display device for each of the plurality of sewing machines. (4) A sewing management method comprising: calculating a normal work time indicating a time required for a normal work of an operator sewing a sewing object using a sewing machine; calculating a correction work time indicating a time required for a correction work of the operator correcting the sewing object using the sewing machine after the normal work has been completed; and outputting the normal work time and the correction work time.

[0058] This application is based on Japanese Patent Application No. 2023-186315, filed on October 31, 2023, the contents of which are incorporated herein by reference.

Claims

1. A sewing management system comprising: a normal operation time calculation unit which calculates a normal operation time indicating a time required for a normal operation of an operator sewing a sewing object using a sewing machine; a correction operation time calculation unit which calculates a correction operation time indicating a time required for the operator to correct the sewing object using the sewing machine after the normal operation has been completed; and an output unit which outputs the normal operation time and the correction operation time.

2. A sewing management system as described in claim 1, wherein a normal tag for identifying the sewing object on which the normal work is performed is attached to the sewing object, and a correction tag for identifying the sewing object on which the correction work is performed is attached to the sewing object, the sewing machine has an identification device for identifying the normal tag and the correction tag, the normal work time calculation unit calculates the normal work time based on first identification data when the identification device identifies the normal tag, and the correction work time calculation unit calculates the correction work time based on second identification data when the identification device identifies the correction tag.

3. The sewing management system according to claim 1, wherein a plurality of the sewing machines are provided, and the output unit causes a display device to display the normal work time and the correction work time for each of the plurality of sewing machines.

4. A sewing management method comprising: calculating a normal operation time indicating the time required for a worker to perform normal operation of sewing a sewing object using a sewing machine; calculating a correction operation time indicating the time required for the worker to perform correction operation of correcting the sewing object using the sewing machine after the normal operation has been performed; and outputting the normal operation time and the correction operation time.

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