Information processing apparatus and image forming apparatus

Abstract

To accurately calculate a print success rate when an image forming apparatus is caused to execute a print job.SOLUTION: An image forming apparatus 1 comprises a calculation unit 101 that, on the basis of a sheet size according to a command in a print job, extracts, from paper jam information, information indicating the rate of occurrence of paper jam for every type of paper jam (JAM code) for the sheet size, calculates a value obtained by adding up the rates of occurrence for every type of paper jam indicated by the extracted information, as an occurrence rate added-up value when the image forming apparatus is caused to execute the print job, and calculates a print success rate from the calculated occurrence rate added-up value.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an information processing apparatus and an image forming apparatus, and more particularly to a technique for assisting a user in selecting an image forming apparatus from among a plurality of image forming apparatuses. [Background technology]

[0002] When multiple printers (image forming devices) and a personal computer (terminal device) are connected via a network, the user can freely select the printer they want to use from the personal computer. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-015151 [Patent Document 2] Japanese Patent Application Laid-Open No. 2009-093223 [Patent Document 3] Japanese Patent Application Laid-Open No. 2000-298540 [Patent Document 4] Japanese Patent Application Laid-Open No. 2012-101518 Summary of the Invention [Problem to be solved by the invention]

[0004] Printers can sometimes jam (paper jam). When jams occur, productivity decreases, so users want to select a printer with a high printing success rate (low total jam rate), but it is not possible to know which printer has a high printing success rate just from the printer's appearance.

[0005] The above-mentioned Patent Document 1 describes changing the paper transport speed based on the jam occurrence history, but this is to prevent jams from occurring, and the invention described in the above-mentioned Patent Document 1 does not calculate the print success rate (total occurrence rate).

[0006] The above-mentioned Patent Documents 2 and 3 describe determining the priority of image forming devices based on the frequency and number of jams occurring within a predetermined period of time, but the inventions described in the above-mentioned Patent Documents 2 and 3 do not calculate the print success rate when a user-specified print job is executed on an image forming device.

[0007] The above Patent Document 4 describes calculating the combined incidence rate based on printing conditions such as paper basis weight and paper type (plain paper, high-quality paper, matte paper), but the invention described in the above Patent Document 4 does not assist users in selecting an image forming device from among multiple image forming devices.

[0008] Furthermore, although paper size is thought to affect jam occurrence, Patent Document 4 does not mention paper size, and the invention described in Patent Document 4 does not provide high accuracy in calculating the combined occurrence rate.

[0009] The present invention has been made in view of the above circumstances, and has as its object to accurately calculate the print success rate for printing by a print job when the print job is executed by an image forming apparatus. [Means for solving the problem]

[0010] An information processing device according to one aspect of the present invention includes a calculation unit that calculates a print success rate when a print job is executed on an image forming device based on jam information relating to jams that have occurred in the image forming device in the past, wherein the jam information includes information indicating the occurrence rate of each type of jam for each paper size, and the calculation unit extracts from the jam information information indicating the occurrence rate of each type of jam for the paper size used for printing by the print job, calculates a value obtained by adding up the occurrence rates for each type of jam indicated by the extracted information as a total occurrence rate value when the print job is executed on the image forming device, and calculates the print success rate from the calculated total occurrence rate value.

[0011] An image forming device according to one aspect of the present invention includes a calculation unit that calculates the print success rate when a print job is executed on the image forming device based on jam information relating to jams that have occurred in the image forming device in the past, wherein the jam information includes information indicating the occurrence rate of each type of jam for each paper size, and the calculation unit extracts from the jam information information indicating the occurrence rate of each type of jam for the paper size used for printing by the print job, calculates a value obtained by adding up the occurrence rates for each type of jam indicated by the extracted information as a total occurrence rate value when the print job is executed on the image forming device, and calculates the print success rate from the calculated total occurrence rate value. [Effects of the Invention]

[0012] According to the present invention, when a print job is executed by an image forming apparatus, the print success rate for printing by the print job can be calculated with high accuracy. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a diagram illustrating an entire information processing system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a functional block diagram illustrating a main internal configuration of the image forming apparatus. [Figure 3] FIG. 4 is a diagram illustrating an example of a data configuration stored in a jam information storage unit. [Figure 4] 10A to 10C are diagrams showing an example of updating jam information. [Figure 5] 10 is a flowchart illustrating an example of a process for updating jam information in the image forming apparatus. [Figure 6] 10 is a flowchart illustrating an example of a process for calculating a print success rate in an image forming apparatus. [Figure 7] FIG. 10 is a diagram illustrating an entire information processing system according to another embodiment of the present invention. [Figure 8] FIG. 10 is a functional block diagram illustrating a main internal configuration of an image forming apparatus according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0014] An information processing apparatus and an image forming apparatus according to an embodiment of the present invention will be described below with reference to the drawings. The information processing apparatus according to an embodiment of the present invention is, for example, an image forming apparatus. Fig. 1 is a diagram showing the entire information processing system according to an embodiment of the present invention.

[0015] An information processing system 11 according to one embodiment includes a plurality of image forming apparatuses 1A to 1C (hereinafter collectively referred to as "image forming apparatuses 1") that exist on a network, and a terminal device 2. The image forming apparatus 1 is a multifunction peripheral that combines multiple functions such as a copy function, a printer function, a scanner function, and a facsimile function. The terminal device 2 is an example of an information processing apparatus within the scope of the claims.

[0016] The terminal device 2 is, for example, a personal computer, and includes a control unit 21, an operation unit 22, a display unit 23, a communication unit 24, and a storage unit 25. Each of these components can transmit and receive data or signals to and from each other via a communication bus.

[0017] The operation unit 22 is composed of a keyboard, a mouse, etc., and outputs commands or characters input by operating the keyboard or mouse, etc., to the control unit 21. The operation unit 22 accepts input of instructions from the user based on the user's operation of the keyboard, mouse, etc. The display unit 23 is composed of an LCD (Liquid Crystal Display), etc., and displays responses and data results from the control unit 21.

[0018] The communication unit 24 is a communication interface for transmitting and receiving various data to and from an external device such as the image forming apparatus 1 within a local area or on the Internet.

[0019] The storage unit 25 is a large-capacity storage device such as a hard disk drive (HDD) or a solid state drive (SSD), and stores various control programs, etc. A printer driver 250 is installed as a program in the terminal device 2. The printer driver 250 is stored in the storage unit 25.

[0020] The control unit 21 includes a processor, RAM (Random Access Memory), ROM (Read Only Memory), and a dedicated hardware circuit. The processor is, for example, a CPU (Central Processing Unit), ASIC (Application Specific Integrated Circuit), or MPU (Micro Processing Unit). The control unit 21 includes a control unit 210 and a print control unit 211.

[0021] The control unit 21 functions as a control unit 210 through operation by the processor in accordance with a control program stored in the storage unit 25, and functions as a print control unit 211 through operation by the processor in accordance with a printer driver 250 stored in the storage unit 25. However, the control unit 210 and the like can also be configured by hardware circuits, rather than relying on operation in accordance with a control program by the control unit 21. Unless otherwise stated below, the same applies to each embodiment.

[0022] The control unit 210 controls the overall operation of the terminal device 2. The control unit 210 is connected to the operation unit 22, the display unit 23, the communication unit 24, and the storage unit 25, and controls the driving of these units.

[0023] The print control unit 211 creates a print job by converting the document to be printed into print data (such as a page description language) that can be analyzed by the image forming apparatus 1. The print control unit 211 transmits the created print job via the communication unit 24 to the image forming apparatus 1 indicated by an instruction input to the operation unit 22 by the user.

[0024] Furthermore, the control unit 210 requests each of the multiple image forming apparatuses 1A to 1C connected via the network to transmit information indicating the print success rate SR when the print job is executed. Furthermore, upon receiving the information indicating the print success rate SR transmitted from the image forming apparatuses 1A to 1C, the control unit 210 controls the display of the display unit 23 to display the print success rate SR of each of the multiple image forming apparatuses 1A to 1C on the display unit 23. This provides information that the user can use to select the most suitable image forming apparatus 1 for printing from the multiple image forming apparatuses 1A to 1C.

[0025] 2 is a functional block diagram showing a schematic diagram of the main internal configuration of image forming apparatus 1. Image forming apparatus 1 includes a control unit 10, a document feeder 6, a document reader 5, an image forming unit 12, a fixing unit 13, a first paper feeder 14, a second paper feeder 15, an operation unit 47, a communication unit 9, and a storage device 8.

[0026] The document feeder 6 is called an ADF (Auto Document Feeder) or DP (Document Processor), and is configured to be openable and closable on the top surface of the document reading unit 5 using a hinge or the like (not shown). The document feeder 6 functions as a document pressing cover when reading a document placed on the platen glass (not shown).

[0027] The document reading unit 5 includes a scanner and the like, and reads the document fed from the document feeding unit 6 or reads the document placed on the platen glass. The document reading unit 5 is also capable of sequentially reading multiple document images sent from the document feeding unit 6.

[0028] The following describes the case where a document is read by the image forming apparatus 1. The document reading unit 5 optically reads an image of a document supplied to the document reading unit 5 by the document feeding unit 6 or a document placed on the platen glass, and generates image data. The image data generated by the document reading unit 5 is stored in an image memory (not shown) or the like.

[0029] The following describes an image forming operation performed by the image forming apparatus 1. The image forming unit 12 is equipped with a photosensitive drum, a charging device, an exposure device, a developing device, and a primary transfer device for each color, and is a mechanism for forming an image on recording paper as a recording medium by secondary transfer via an intermediate transfer belt. The image forming unit 12 forms a toner image on recording paper fed from the first paper feed unit 14 or the second paper feed unit 15 based on image data generated by a document reading operation, image data stored in an image memory, etc., and image data received from a computer connected via a network, to create a printed matter.

[0030] The fixing unit 13 is a fixing device equipped with a heat roller, a pressure roller, and a drive mechanism for rotating these rollers. The fixing unit 13 heats and presses the recording paper on which the toner image has been formed by the image forming unit 12 at the nip between the two rollers, fixing the toner image to the recording paper. The recording paper that has been fixed is then discharged to an output tray (not shown).

[0031] The first paper feed unit 14 includes a paper feed cassette, and further includes a pickup roller that picks up recording paper from the paper feed cassette and feeds it to the image forming unit 12, a transport roller, a transport path, and a rotation drive mechanism for each roller. The second paper feed unit 15 includes a multi-tray, and like the first paper feed unit 14, further includes a pickup roller that picks up recording paper from the multi-tray and feeds it to the image forming unit 12, a transport roller, a transport path, and a rotation drive mechanism for each roller.

[0032] The operation unit 47 includes various hard keys that are operated by the user, and receives instructions from the user, such as an instruction to execute an image forming operation, regarding various operations and processes that the image forming apparatus 1 can execute in response to the operation of the hard keys.

[0033] The operation unit 47 includes a display unit 473 that displays operation guides and the like to the operator. The operation unit 47 also receives input of instructions from the user based on the user's operation (touch operation) on the screen displayed on the display unit 473 via a touch panel that the display unit 473 has.

[0034] The display unit 473 is made up of an LCD or the like. When the operator touches a button or key displayed on the screen, the touch panel receives an instruction associated with the touched position. In this case, the touch panel functions as an operation unit.

[0035] The communication unit 9 is a communication interface for transmitting and receiving various data to and from an external device (for example, the terminal device 2) within a local area or on the Internet.

[0036] The storage device 8 is a non-volatile large-capacity storage device such as an HDD or SSD, and stores various control programs, etc. The storage device 8 also has a jam information storage unit 81. The jam information storage unit 81 is a storage area that stores jam information related to jams that have occurred in the image forming apparatus 1 in the past.

[0037] Fig. 3 is a diagram showing an example of the data configuration stored in the jam information storage unit 81. As shown in Fig. 3, the jam information storage unit 81 stores jam information for each type of jam (JAM code) and each paper size (A3, A4, Letter, etc.).

[0038] JAM codes generally indicate the location of the jam. For example, JAM code [C-01] indicates a jam in the second paper feed section 15 (multi-tray), JAM code [C-02] indicates a jam in the fixing section 13 (a fixing unit that constitutes the fixing device), and JAM code [N-01] indicates a jam in the image forming section 12 (a drum unit that constitutes the photosensitive drum).

[0039] The jam information storage unit 81 stores jam history information for each type of jam and each paper size, for example, for the most recent 30 print jobs. The jam history information includes information indicating whether a jam occurred and information indicating the number of pages printed before the jam occurred. For example, the jam information storage unit 81 stores that a jam with a JAM code of [C-01] occurred in the most recent print job [1] using a paper size of [A3], and that the number of pages printed before the jam occurred was "27 pages," and that no jam with a JAM code of [C-01] occurred in the most recent print job [2] using a paper size of [A3].

[0040] The jam information storage unit 81 also stores, as jam information, information indicating the occurrence rate R1 of each jam type by paper size and information indicating the average number of pages printed before a jam occurred (average page count AN). The occurrence rate R1 of each jam type by paper size is the proportion of jams of that type that occurred in the most recent 30 print jobs using that paper size. For example, if a jam with a JAM code of [C-01] occurred three times in the most recent 30 print jobs using a paper size of [A3], the occurrence rate R1 of jams with a JAM code of [C-01] for a paper size of [A3] is 10% (= 3 / 30).

[0041] The average number of pages AN for each jam type and paper size is the average number of pages printed before a jam of that type occurred in the most recent 30 print jobs using that paper size. For example, if three jams with JAM code [C-01] occurred in the most recent 30 print jobs using paper size [A3], and the number of pages printed before the jams occurred was 27, 28, and 32, respectively, the average number of pages AN would be 29 pages (= (27 + 28 + 32) / 3).

[0042] Returning to the explanation with reference to Fig. 2, the control unit 10 is configured to include a processor, RAM, ROM, and a dedicated hardware circuit. The processor is, for example, a CPU, an ASIC, or an MPU. The control unit 10 includes a control unit 100 and a calculation unit 101.

[0043] The control unit 10 functions as a control unit 100 and a calculation unit 101 by the operation of the processor in accordance with a control program, etc. stored in the storage device 8. However, the control unit 100, etc. may also be configured by hardware circuits, without relying on the operation in accordance with a control program by the control unit 10. Unless otherwise specified below, this applies to each embodiment.

[0044] The control unit 100 is responsible for overall operational control of the image forming apparatus 1. The control unit 100 is connected to the document feeding unit 6, the document reading unit 5, the image forming unit 12, the fixing unit 13, the first paper feeding unit 14, the second paper feeding unit 15, the operation unit 47, the communication unit 9, and the storage device 8, and controls the driving of each of these units and executes various processes required for image formation by the image forming apparatus 1.

[0045] The calculation unit 101 calculates the print success rate when a print job is executed by the image forming apparatus 1 based on jam information relating to jams that have occurred in the image forming apparatus 1 in the past.

[0046] The calculation unit 101 extracts information indicating the jam occurrence rate R1 for each type of jam for the paper size used in printing by the print job from the jam information, calculates the sum of the jam occurrence rates R1 for each type of jam indicated by the extracted information as the total occurrence rate JR when the print job is executed by the image forming device 1, and calculates the print success rate SR from the calculated total occurrence rate JR.

[0047] Furthermore, the calculation unit 101 does not include in the calculation of the total occurrence rate JR the occurrence rate R1 of the type of jam for which the average page number AN is greater than the total number of pages printed TN instructed by the print job.

[0048] 4A to 4C are diagrams showing an example of updating jam information regarding a jam with a paper size of [A3] and a JAM code of [C-01]. Jam information is stored in the jam information storage unit 81 for each paper size.

[0049] When the jam information shown in the example of Fig. 4(A) exists, when the control unit 100 executes a new print job with a paper size of [A3], it erases the most recent

[30] information, shifts the jam history information one position to the left in the figure, and adds the new information to the most recent [1], as shown in the example of Fig. 4(B). In this case, when a new print job is executed and a jam with a JAM code of [C-01] occurs, the control unit 100 adds information indicating that a jam occurred (JAM) and information indicating the number of pages printed before the jam occurred (25 pages) as the most recent [1] information, and updates the jam occurrence rate (13.3% ≒ 4 / 30) and the average page count AN (28 pages = (25 + 27 + 28 + 32) / 4).

[0050] Then, when a new print job is executed, in this case, if a jam with a JAM code of [C-01] does not occur, the control unit 100 adds information indicating that a jam did not occur (No JAM) as the most recent [1] information, as shown in the example of FIG. 4(C), and updates the jam occurrence rate (10% = 3 / 30) and the average page count AN (27 pages ≒ (25 + 27 + 28) / 3).

[0051] Next, an example of a process for updating jam information in the image forming apparatus 1 will be described with reference to the flowchart shown in Fig. 5. This process is performed when a jam occurs in a print job that is currently being executed, or when the print job is completed without a jam occurring.

[0052] First, the control unit 100 acquires data included in the print job (paper size SZ as instructed by the print job) (S1), determines whether a jam has occurred (S2), and if it determines that a jam has occurred (YES in S2), acquires a JAM code indicating the type of jam that has occurred (S3).

[0053] Next, the control unit 100 updates the jam information stored in the jam information storage unit 81 for the paper size SZ of the acquired JAM code (S4), after which the processing ends. As described above, the control unit 100 erases the most recent

[30] jam history information and adds information indicating that a jam occurred (JAM) and information on the number of pages printed before the jam occurred as the most recent [1] jam history information. Furthermore, the control unit 100 calculates the jam occurrence rate and the average page number AN based on the updated jam history information, and updates these pieces of information as well.

[0054] On the other hand, if the control unit 100 determines that a jam has not occurred (NO in S2), it acquires a JAM code indicating the type of jam that could have occurred in the print job (S5), updates the jam information stored in the jam information storage unit 81 for the paper size SZ for each acquired JAM code (S6), and then ends the process. As described above, the control unit 100 erases the most recent

[30] jam history information and adds information indicating that no jam occurred (No JAM) as the most recent [1] jam history information. Furthermore, the control unit 100 calculates the jam occurrence rate and the average page number AN based on the updated jam history information, and updates these pieces of information as well.

[0055] Next, an example of the calculation process of the print success rate in the image forming apparatus 1 will be described with reference to the flowchart shown in Fig. 6. This process is performed when a print job transmitted from the terminal device 2 is received via the communication unit 9, and a request to transmit information indicating the print success rate SR when the print job is executed is received.

[0056] First, the control unit 100 acquires the data included in the print job (the paper size SZ and the total number of pages to be printed TN instructed by the print job) (S11), and sets the total occurrence rate JR to 0 as the initial value setting (S12). Thereafter, the calculation unit 101 sequentially executes an extraction process for each type of jam to extract information indicating the occurrence rate for each type of jam by paper size from the jam information stored in the jam information storage unit 81.

[0057] The calculation unit 101 determines whether or not a type of jam for which the extraction process should be performed exists in the jam information storage unit 81 based on the paper size SZ instructed by the print job (S13). If the calculation unit 101 determines that a type of jam for which the extraction process should be performed exists (YES in S13), the calculation unit 101 obtains information indicating the average page count AN for the paper size SZ for a certain type of jam based on the paper size SZ instructed by the print job from the jam information storage unit 81 (S14), and determines whether or not the total number of printed pages TN instructed by the print job is greater than the average page count AN (S15).

[0058] If the calculation unit 101 determines that the total number of pages printed TN in response to the print job command is greater than the average page number AN (YES in S15), it extracts information indicating the occurrence rate R1 of that type of jam for that paper size SZ from the jam information storage unit 81 (S16), and adds the occurrence rate R1 to the total occurrence rate JR (S17).The process then proceeds to S18.This is because if the total number of pages printed TN in response to the print job command is greater than the average page number AN, there is a high possibility that that type of jam will occur.

[0059] When jam information such as the example shown in FIG. 3 is stored in jam information storage unit 81, the average number of pages AN for a paper size of [A3] for a jam with a JAM code of [C-01] is 29 sheets, so when the paper size specified in the print job command is [A3] and the total number of printed pages TN is 30 sheets or more, it is determined that there is a high possibility that a jam with a JAM code of [C-01] will occur.

[0060] On the other hand, if the calculation unit 101 determines that the total number of pages printed by the print job command TN is not greater than the average page number AN (NO in S15), the calculation unit 101 does not add the incidence rate R1 to the total incidence rate JR, and the process proceeds to S18.

[0061] The calculation unit 101 determines whether or not there is a jam of the type that should be subjected to the extraction process remaining in the jam information storage unit 81 based on the paper size SZ specified in the print job (S18), and if it determines that there is (YES in S18), returns to S14 and performs processing to extract information indicating the occurrence rate R1 for another type of jam.

[0062] On the other hand, if the calculation unit 101 determines that there are no remaining jams of the type that require the extraction process (NO in S18), it calculates the print success rate SR (=100%-JR) from the total occurrence rate JR (S19), and the control unit 100 transmits information indicating the print success rate SR to the terminal device 2 via the communication unit 9 (S20). After this, the process ends.

[0063] Furthermore, in S13, if the calculation unit 101 determines that there is no jam of the type for which the extraction process should be performed in the jam information storage unit 81 (NO in S13), the process proceeds to S19, where the printing success rate SR is set (S19). At this time, the total occurrence rate JR is 0, so the printing success rate SR is set to 100%.

[0064] When the control unit 210 of the terminal device 2 receives information indicating the print success rate SR transmitted from the multiple image forming devices 1A to 1C via the communication unit 24, it controls the display on the display unit 23 to display a list of the print success rate SR for each of the multiple image forming devices on the display unit 23. This helps the user select an image forming device 1 from the multiple image forming devices 1A to 1C. At this time, it is preferable that the control unit 210 display the list of image forming devices 1 in descending order of the print success rate SR.

[0065] According to the above embodiment, the print success rate SR is calculated taking into consideration the type of jam and the paper size, so the print success rate SR can be calculated with high accuracy. The print success rate SR can be used as an indicator for selecting an image forming device 1. Therefore, it is possible to assist the user in selecting an image forming device 1 from among multiple image forming devices 1A to 1C.

[0066] Therefore, according to the above embodiment, when a print job is executed by an image forming apparatus, the print success rate for printing by the print job can be calculated with high accuracy.

[0067] However, there are some types of jams that cannot occur depending on the content of the print job. For example, if the multi-tray is not used, a jam with a JAM code of [C-01] will not occur.

[0068] Therefore, in another embodiment, the calculation unit 101 does not include the occurrence rate R1 of a type of jam that is predetermined based on the content of the print job as being unlikely to occur during the execution of the print job in the calculation of the total occurrence rate JR, thereby enabling the calculation of the print success rate SR with even greater accuracy.

[0069] In the above embodiment, the calculation unit 101 is provided in the image forming apparatus 1, and the control unit 210 of the terminal apparatus 2 displays a list of information indicating the print success rate SR received from the image forming apparatus 1 on the display unit 23. However, as shown in FIGS. 7 and 8 , the terminal apparatus 2 may be provided with the calculation unit 101, and the image forming apparatus 1 may not be provided with the calculation unit 101, and the jam information may be transmitted to the terminal apparatus 2 from the communication unit 9 under the control of the control unit 100. In the terminal apparatus 2, when the jam information is received by the communication unit 24, the calculation unit 101 calculates the print success rate when a print job is executed by the image forming apparatus 1 based on the jam information. The calculation by the calculation unit 101 is performed, for example, when the print control unit 211 creates a print job and before transmitting the print job to any of the image forming apparatuses 1. When the print control unit 211 creates the print job, it transmits a request for transmission of jam information to each of the image forming apparatuses 1A to 1C. The control unit 210 displays a list on the display unit 23 of the print success rates SR for each of the image forming apparatuses 1A to 1C obtained by the above calculation.

[0070] The present invention is not limited to the configuration of the above embodiment, and various modifications are possible. In addition, in the above embodiment, the configuration and processing shown in the above embodiment using Figures 1 to 8 are merely one embodiment of the present invention, and it is not intended that the present invention be limited to these configurations and processing. [Explanation of symbols]

[0071] 1. Image forming device 2. Terminal Device 23 Display section 100 control section 101 Calculation Unit

Claims

1. An image forming apparatus, a calculation unit that calculates a print success rate when a print job is executed by the image forming apparatus based on jam information relating to jams that have occurred in the image forming apparatus in the past; The jam information includes information indicating the occurrence rate of each type of jam for each paper size, The calculation unit extracts information indicating the occurrence rate of each type of jam for the paper size used in printing by the print job from the jam information, calculates a value obtained by adding up the occurrence rates for each type of jam indicated by the extracted information as a total occurrence rate value when the print job is executed by the image forming device, and calculates the print success rate from the calculated total occurrence rate value.

2. The jam information includes information indicating an average number of pages printed by paper size for each type of jam before the jam occurs, The image forming apparatus according to claim 1 , wherein the calculation unit does not include in the calculation of the total occurrence rate a jam occurrence rate of a type for which the average value is greater than the total number of pages printed by the print job.

3. 3. The image forming apparatus according to claim 1, wherein the calculation unit does not include in the calculation of the combined occurrence rate value the occurrence rate of a predetermined type of jam that cannot occur during the execution of the print job, based on the content of the print job.

4. 3. The image forming apparatus according to claim 1, further comprising a communication unit that transmits the print success rate to an information processing apparatus.

5. a calculation unit that calculates a print success rate when a print job is executed by an image forming apparatus based on jam information relating to jams that have occurred in the image forming apparatus in the past; The jam information includes information indicating the occurrence rate of each type of jam for each paper size, The calculation unit extracts information indicating the occurrence rate of each type of jam for the paper size used in printing by the print job from the jam information, calculates a value obtained by adding up the occurrence rates for each type of jam indicated by the extracted information as a total occurrence rate value when the print job is executed on the image forming device, and calculates the print success rate from the calculated total occurrence rate value.

6. A display unit; The information processing apparatus according to claim 5 , further comprising: a control unit that causes the display unit to display the print success rate.

Images