JP2010257221A - Device for calculation of operation time at image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect a job where an error has occurred during the execution of a job in an image forming apparatus, and to correct the processing time of the job. <P>SOLUTION: Job log information is acquired from the image forming apparatus (S902), and a job processing time is specified from a job start time and a job end time (S903). Then, the job processing time is corrected (S904) based on the number of print pages of the job and the printing speed of the image forming apparatus which has processed the job. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an apparatus for calculating an operation time of an image forming apparatus.

  Services are provided to analyze the operating status of image forming apparatuses such as printers, copiers, and multifunction machines at customer sites, and to select and propose models that are optimal for the customer environment based on the analysis results.

  The operating rate is used as the operating status analysis of the image forming apparatus. In general, the operation rate of the image forming apparatus refers to a ratio of time (operating time) during which the image forming apparatus performs job processing such as actual printing out of the time during which the image forming apparatus is operated.

  Conventionally, the job processing time is a value obtained by subtracting the job start date and time from the job end date and time recorded in the job execution history (job log information) of the image forming apparatus, and the total processing time of jobs processed in a specific period The value was the operating time.

  In Patent Document 1, an expected processing time of a target print job is calculated by referring to a table storing standard processing time of a print job. The table storing the standard processing time of a print job uses a combination of a plurality of output conditions as an index. For example, using the output destination “printer name”, “color mode”, “image size”, and “N-up” as an index, the processing time for the first sheet and the processing time for the second and subsequent sheets are recorded as standard processing times. Yes.

JP 2003-005943 A

  The job processing time used for calculating the operation rate of the image forming apparatus is calculated by subtracting the job start date and time from the job end date and time recorded in the job log information. This job processing time calculation method does not take into account the case where the job processing is stopped due to an error of the image forming apparatus. For example, if a paper jam or out of toner occurs in the image forming apparatus during the execution of the print job, the print job is stopped until the error is restored, and the time when the print job is completed after the error is restored is stored as the job end date and time. In such a case, in the above-described job processing time calculation method, the job processing time includes a time during which job processing has been stopped due to an error. Therefore, when analyzing the load status of the image forming apparatus using the total value of the job processing times as the operation time, there is a problem that the load is higher than the actual load.

  The present invention has been made to solve the above problems, and an object of the present invention is to detect a job in which an error has occurred during execution of a job in an image forming apparatus and correct the processing time of the job. Is to provide.

  In order to solve the above-described problem, an information processing apparatus that calculates an operation time of the image forming apparatus using a total of processing times of a plurality of jobs executed in a specific period of the image forming apparatus according to the present invention is the image processing apparatus. An acquisition unit that acquires job log information from the forming apparatus; a specifying unit that specifies a job processing time from a job start time and a job end time for each job recorded in the job log information acquired by the acquisition unit; Correction means for correcting the job processing time of the job based on the number of print pages of the job recorded in the job log information acquired by the acquisition unit and the printing speed of the image forming apparatus that has processed the job. It is characterized by.

  According to the present invention, it is possible to detect a job in which an error has occurred during execution of the job in the image forming apparatus and correct the processing time of the job.

1 is a schematic diagram illustrating a configuration of a system that analyzes an operation status of an image forming apparatus according to an exemplary embodiment of the present invention. It is a block diagram explaining the internal structure of the information processing apparatus which comprises the host computer shown in FIG. 1, and an analysis server. FIG. 2 is a block diagram illustrating an example of an internal configuration of the multifunction peripheral illustrated in FIG. 1. FIG. 2 is a block diagram showing a detailed configuration of a module of the host computer shown in FIG. 1. It is a block diagram which shows the detailed structure of the analysis server shown in FIG. FIG. 2 is a block diagram for explaining a data processing configuration of the multifunction peripheral shown in FIG. 1. FIG. 6 is a diagram illustrating an example of a job log information table provided in the job log collection unit illustrated in FIG. 5. FIG. 6 is a diagram illustrating an example of an image information forming apparatus information table provided in the image information forming apparatus information management unit illustrated in FIG. 5. It is a flowchart which shows an example of the 1st data processing procedure in the information processing apparatus which shows this embodiment. It is a figure which shows the concept of the correction process of the job processing time in the analysis process part of the analysis server shown in FIG. It is a flowchart which shows an example of the 2nd data processing procedure in the information processing apparatus which shows this embodiment. It is a figure which shows an example of the analysis result table managed by the analysis process part shown in FIG.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

<Description of system configuration>
FIG. 1 is a schematic diagram illustrating a configuration of a system that analyzes an operation status of an image forming apparatus according to an embodiment of the present invention.

  In FIG. 1, reference numeral 101 denotes a host computer which is used by a user to generate image data and perform printing. The host computer 101 includes hardware resources described later, and software resources including an operating system (OS), a printer driver, and the like. Further, the host computer 101 is communicably connected to an image forming apparatus connected to the network 105 using a predetermined protocol.

  A printer 103 receives print data received via a network, and prints on actual paper using a known print technology such as electrophotographic technology or inkjet technology. Reference numeral 104 denotes a multifunction peripheral (MFP (Multifunction Peripheral)) that receives print data received via a network and prints on an actual sheet by using a known print technique such as an electrophotographic technique or an inkjet technique. The multifunction device 104 also has a function of reading a paper document through a scanner, copying it, converting it into image data, and sending it by e-mail or the like. Of course, a printer having no copy function is also applicable.

  An analysis server 102 analyzes the operating status of the printer 103 and the multifunction peripheral 104. Here, the analysis process includes a process of correcting a job processing time used for calculating an operation time, which will be described later.

  Note that the host computer 101, the multifunction peripheral 104, the printer 103, and the analysis server 102 are connected to be communicable with each other via a network 105 using a known technique such as Ethernet (registered trademark). In this embodiment, the analysis server 102 is provided as a separate configuration from the printer 103 and the multifunction device 104. However, a module having the same function may be provided in the printer 103 and the multifunction device 104. I do not care. In this case, the network communication performed between the analysis server 102, the printer 103, and the multi-function peripheral 104 can be replaced with data exchange via a system bus or the like.

<Computer configuration>
FIG. 2 is a block diagram illustrating the internal configuration of the information processing apparatus that constitutes the host computer 101 and the analysis server 102.

  In FIG. 2, reference numeral 200 denotes an entire computer (PC). The PC 200 includes a CPU 201 that executes software stored in the ROM 202 or, for example, the HD 211 as a large-scale storage device, and the CPU 201 generally controls each image forming apparatus connected to the system bus 205. A RAM 203 functions as a main memory, work area, and the like for the CPU 201. A network interface card (NIC) 204 exchanges data with other nodes via the network 105 in both directions. A keyboard controller (KBDC) 206 controls an instruction input from a keyboard (KBD) 209 provided in the PC. Reference numeral 207 denotes a display controller (DISPC) that controls the display of a display module (DISPLAY) 210 constituted by, for example, a liquid crystal display. A disk controller (DKC) 208 controls a hard disk (HD) 211 that is a mass storage image forming apparatus.

<Configuration of MFP>
FIG. 3 is a block diagram showing an example of the internal configuration of the multifunction peripheral 104 shown in FIG.

  In FIG. 3, reference numeral 300 denotes the entire multifunction peripheral. The multifunction machine 300 includes a CPU 301 that executes software stored in a ROM 302 or an HD 313 as a large-scale storage device such as a hard disk. The CPU 301 generally controls each image forming apparatus connected to the system bus 305. . A RAM 303 functions as a main memory, work area, and the like for the CPU 301. A network interface card (NIC) 304 exchanges data with other nodes via the network 105. Reference numeral 306 denotes a panel controller (PANELC) which controls an instruction input from an operation panel (PANEL) 311 provided in the multifunction peripheral. Reference numeral 307 denotes a display controller (DISPC), which controls the display of a display module (DISPLAY) 312 composed of a liquid crystal display, for example. A disk controller (DKC) 308 controls a hard disk (HD) 313 that is a mass storage image forming apparatus. Reference numeral 309 denotes a scanner controller (SCCANC) which controls an optical scanner device (scanner) 314 provided in the multifunction peripheral and reads a paper document. A printer controller (PRNC) 310 controls a printer device (printer) 315 provided in the multifunction peripheral, and prints on an actual sheet using a known printing technique such as an electrophotographic technique or an inkjet technique.

  The internal configuration of the printer 103 shown in FIG. 1 can be considered to be obtained by removing the scanner controller 309 and the optical scanner device 314 from the internal configuration of the multifunction machine 104 shown above. Further, the configuration may be such that the panel controller (PANELC) 306, the operation panel 311, the display controller (DISPC) 307, the display module (DISPLAY) 312 and the like are removed.

<Detailed configuration of host computer>
FIG. 4 is a block diagram showing a detailed configuration of modules of the host computer 101 shown in FIG.

  In FIG. 4, reference numeral 400 denotes the entire host computer. A print application 401 issues a print instruction by sending a drawing command or the like to the printer driver 402. The printer driver 402 converts a drawing command received from the print application 401 into print data that can be interpreted by the multi-function peripheral, that is, PDL (Page Description Language). Further, the printer driver 402 adds the user ID of the user who has instructed printing by operating the print application 401 as job owner information, creates a print job, and transmits the print job to the print job transmission unit 403. A print job transmission unit 403 transmits the print job received from the printer driver 402 to the multi-function peripheral 104.

<Detailed configuration of analysis server>
FIG. 5 is a block diagram showing a detailed configuration of the analysis server 102 shown in FIG.

  In FIG. 5, reference numeral 500 denotes the entire analysis server. Reference numeral 501 denotes an interface unit that communicates with the host computer 101, the printer 103, and the multi-function peripheral 104 via the network 204 via the NIC 204 shown in FIG. A job log collection unit 502 collects job log information from the printer 103 and the multifunction machine 104 and stores it in a job information area secured in the HD 211. An image forming apparatus information management unit 503 holds image forming apparatus information such as a printing speed. Reference numeral 504 denotes an analysis processing unit that analyzes the operating status of an image forming apparatus such as the multifunction peripheral 104 based on job log information and image forming apparatus information.

<Detailed configuration of MFP>
FIG. 6 is a block diagram for explaining a data processing configuration of the multifunction peripheral 104 shown in FIG.

  In FIG. 6, reference numeral 600 denotes the entire multifunction peripheral. An interface unit 601 is connected to the network 105 and receives a print job from the host computer 101. A print data storage unit 602 temporarily stores print job data. Reference numeral 603 denotes a UI control unit which controls the operation panel 311 via a panel controller (PANELC) 306 and accepts a copy instruction from the user to the MFP 104 and a scan transmission instruction. A job management unit 604 analyzes a print job received from the host computer 101, acquires output attribute information such as the number of copies and color printing, and manages it as job information together with the job start time. A print data expansion unit 605 acquires print data from the print data storage unit 602 according to job information stored in the job management unit 604, performs image generation processing, and generates image data on the RAM 303. A scanner control unit 606 controls the scanner controller 309, scans a paper document, and creates created image data. The scanner control unit 606 controls document feeding and document ejection from the ADF or RDF when an ADF, RDF, or the like can be connected as the document feeder. Further, when reading a double-sided document, the scanner control unit 606 may perform document reversal control. An image data storage unit 607 temporarily stores image data generated by the print data development unit 605 and the scanner control unit 606. A printer control unit 608 controls the printer engine 609 to print the image data stored in the image data storage unit 607. Reference numeral 609 denotes a printer engine, which actually prints image data stored in the image data storage unit 607 on a medium such as printing paper using a known printing technique such as an electrophotographic technique or an inkjet technique. A job log management unit 610 manages job log information. When the job is completed, the job management unit 604 transmits job information to be managed as job log information to the job log management unit 610 and stores it in the job log management unit 610. The job log management unit 610 transmits a job log in response to a request from the analysis server 102. Note that the configuration of the printer 103 that does not have a scanner can be considered as a configuration in which the scanner control unit 606, the UI control unit 603, and the like are excluded from the configuration of the multifunction peripheral 104 described with reference to FIG.

<Job log information table>
FIG. 7 is a diagram illustrating an example of a job log information table provided in the job log collection unit 502 illustrated in FIG.

  In FIG. 7, reference numeral 701 denotes a job log ID, which is an ID for uniquely identifying the job log in the system. Reference numeral 702 denotes an image forming apparatus ID of the image forming apparatus that has processed the job. Details of the image forming apparatus ID will be described later. Reference numeral 703 denotes a job processing start date and time. Reference numeral 704 denotes a job processing end date and time. Reference numeral 705 denotes the number of pages printed in monochrome for the job. Reference numeral 706 denotes the number of pages printed in the job color.

  Based on these pieces of information managed by the job log collection unit 502, it is possible to record log information indicating what job is started and ended on which image forming apparatus.

  For example, the job log information 707 indicates the number of monochrome pages that started at 2009/03/01 15:00:00 and ended at 2009/03/01 15:00:30 in the image forming apparatus with the image forming apparatus ID 100. This is a job log for jobs with 20 pages and 5 color pages.

  The job log information 708 indicates that the number of color pages which started at 2009/03/01 15:12:50 and ended at 2009/03/01 15:13:14 in the image forming apparatus with the image forming apparatus ID 101 is 12 This is the job log related to the job of the page.

  The job log information 709 has a monochrome page count of 15 for an image forming apparatus with an image forming apparatus ID of 100, which started at 2009/03/01 15:30:15 and ended at 2009/03/01 16:17:13. This is the job log related to the job of the page.

  Note that the job log management unit 610 illustrated in FIG. 6 includes a job log information table equivalent to a format obtained by removing the image forming apparatus ID 702 from the job log information table of FIG.

<Image forming apparatus information table>
FIG. 8 is a diagram illustrating an example of an image information forming apparatus information table provided in the image information forming apparatus information management unit 504 illustrated in FIG.

  In FIG. 8, reference numeral 801 denotes an image forming apparatus ID, which is an ID for uniquely identifying the image forming apparatus in the system.

  Reference numeral 802 denotes a monochrome page printing speed, and reference numeral 803 denotes a color page printing speed. In this embodiment, an example is shown in which PPM (Page Per Minute) representing the number of pages that can be printed per minute is used as the printing speed.

  From these pieces of information managed by the image information forming apparatus information management unit 504, the printing speed of the image forming apparatus can be known.

  For example, the image forming apparatus information 804 is image forming apparatus information relating to an image forming apparatus having a monochrome printing speed of 50 pages / minute and a color printing speed of 50 pages / minute. The image forming apparatus information 805 is image forming apparatus information relating to an image forming apparatus having a monochrome printing speed of 40 pages / minute and a color printing speed of 30 pages / minute. The image forming apparatus information 806 is image forming apparatus information relating to an image forming apparatus having a monochrome printing speed of 30 pages / minute and a color printing speed of 28 pages / minute.

<Analysis processing of job processing time in analysis server>
FIG. 9 is a flowchart illustrating an example of a first data processing procedure in the information processing apparatus according to the present embodiment. This example is an example in which the analysis server 102 shown in FIG. 1 performs an analysis process of job processing time as an information processing apparatus. Further, the analysis server 102 executes this job processing time analysis process at regular intervals.

  Note that S901 to S906 indicate each step, and each step is realized by the CPU 201 loading a control program from the HD 211, ROM 202, etc. to the RAM 203 and executing it.

  When the job processing time analysis process is started, the job log collection unit 502 of the analysis server 102 communicates with the printer 103 and the multifunction peripheral 104 via the interface unit 501 and is managed by the job log management unit 610 in step S901. Collect job logs. Here, the acquired job log is stored in the job log information table shown in FIG.

  In step S <b> 902, the analysis processing unit 504 acquires the collected job log from the job log collection unit 502. In step S903, the analysis processing unit 504 performs processing for calculating the job processing time of the job log acquired in step S902. In this embodiment, the job processing time is calculated by the following formula.

[Job processing time] = [Job end date and time]-[Job start date and time]
In step S904, the analysis processing unit 504 corrects the job processing time calculated in step S903. Details of the job processing time correction processing will be described later. In step S905, the analysis processing unit 504 outputs the job processing time corrected in step S904 to the analysis result table. Details of the analysis result table will be described later. In step S906, the analysis processing unit 504 determines whether the processing in steps S902 to S905 has been performed on all job logs collected in step S901. If the analysis processing unit 504 determines that all job logs collected in S901 have not been processed, the process returns to S902 to repeat the processing. On the other hand, if the analysis processing unit 504 determines that all job logs collected in step S901 have been processed, this processing ends.

<Job processing time correction processing in the analysis server>
FIG. 10 is a diagram showing a concept of job processing time correction processing in the analysis processing unit 504 of the analysis server 102 shown in FIG. Hereinafter, the job processing time correction processing in step S905 illustrated in FIG. 9 will be described in detail.

  In FIG. 10, the horizontal axis is the time axis, and the right direction shows the flow of time.

  Reference numeral 1001 shows the job log 709 of the job log information table shown in FIG. 7, and indicates that job processing started at 15:30:15 and ended at 16:17:13. Reference numeral 1002 indicates a time when an error has occurred in the image forming apparatus due to a paper jam or out of toner, and indicates that an error has occurred at 15:30:20 and has returned to 16:17:00. Yes. The job processing of the job 1001 is interrupted due to the error 1001, and the processing is stopped in the time zone 1004 until the error is recovered. For this reason, the total time of the job processing time 1003 and the job processing time 1005, excluding the time zone 1004 when the job processing was stopped due to an error, is the time when the image forming apparatus was purely processing the job.

  As described above, when an error occurs in the image forming apparatus between the start date and time and the end date and time of job processing, and job processing is stopped, it is necessary to correct the job processing time.

  When the error log of the image forming apparatus can be acquired, the time during which the error has stopped due to an error can be calculated from the error log. As a result, the time during which the image forming apparatus is performing job processing purely is the time obtained by subtracting the time that has been stopped due to an error from the job processing time calculated in S903 of FIG.

  However, when the error log of the image forming apparatus cannot be acquired, the job processing time cannot be corrected because the time during which the error has been stopped cannot be known.

  Therefore, in the present invention, the analysis processing unit 504 calculates the expected processing time of the job from the number of print pages of the job log and the printing speed of the image forming apparatus. The expected processing time is an estimated time that is the sum of the job processing time 1003 and the job processing time 1005 in FIG. Then, the analysis processing unit 504 compares the calculated job processing time calculated in S903 of FIG. 9 with the expected processing time, and determines whether an error has occurred in the job processing time. Subsequently, the analysis processing unit 504 replaces the job processing time determined that an error has occurred in the job processing time with the expected processing time. Thereby, it is possible to correct the job processing time of a job in which an error has occurred in the job processing time.

  FIG. 11 is a flowchart illustrating an example of a second data processing procedure in the information processing apparatus according to the present embodiment. This example is a detailed procedure example of the job processing time correction process executed in S904 shown in FIG.

  S1101 to S1107 indicate each step, and each step is realized by the CPU 201 loading a control program from the HD 211, the ROM 202, or the like into the RAM 203 and executing it.

  When the job processing time correction process is started, in step S1101, the analysis processing unit 504 determines whether the job log acquired in step S902 in FIG. 9 is a job log of a job processed by the image forming apparatus to be corrected. If the analysis processing unit 504 determines that the job log is not the job log of the image forming apparatus to be corrected, the job processing time correction process is not performed and the process ends. On the other hand, if the analysis processing unit 504 determines that the job log is the job log of the image forming apparatus to be corrected, the process advances to step S1102.

  The determination in step S1101 is performed in order to exclude the job log of the image forming apparatus from which correction of the job processing time based on the number of printed pages and the printing speed is difficult from the correction target. For example, the job log of an image forming apparatus in which it is difficult to predict the job processing time depending on the number of printed pages and the printing speed, such as a large format printer that requires ink drying time every time one page is printed, is excluded from the correction target. To do. The determination as to whether or not the image forming apparatus is a correction target may be based on the model name of the image forming apparatus.

  In step S1102, the analysis processing unit 504 determines whether the job processing time calculated in step S903 in FIG. Here, if the analysis processing unit 504 determines that the job processing time is smaller than the specified value, the job processing time correction processing is not performed, and this processing ends. On the other hand, if the analysis processing unit 504 determines that the job processing time is equal to or greater than the specified value, the processing proceeds to S1103.

  The determination in step S1102 is performed to prevent the normal job processing time from being erroneously corrected. For example, a job with a short job processing time, such as one print page, has a large proportion of warm-up processing time such as image data creation that differs depending on each job with respect to the entire job processing time. However, the warm-up processing time is not considered in the processing time estimated from the number of printed pages and the printing speed. That is, a job with a short job processing time may have a large error between the job processing time and the expected processing time depending on the job. Also, even when analyzing the load situation using the total operation time of job processing time, even if the job with short job processing time includes the time that was stopped due to an error, The ratio of job processing time to the operating time is small and the influence is small. Therefore, in this embodiment, a predetermined value is set in advance (for example, 30 minutes), and a job with a shorter job processing time is not corrected, thereby preventing a normal job processing time from being corrected erroneously. effective.

  In step S <b> 1103, the analysis processing unit 504 acquires the print speed of the image forming apparatus that has processed the job of the job log acquired in step S <b> 902 in FIG. 9 from the image forming apparatus information management unit 503.

  In step S1104, the analysis processing unit 504 determines whether the print speed has been successfully acquired in step S1103. If the analysis processing unit 504 determines that acquisition of the printing speed has failed, the job processing time correction processing is not performed, and the processing ends. On the other hand, if the analysis processing unit 504 determines that the printing speed has been successfully acquired, the process advances to step S1105.

  In step S1105, the analysis processing unit 504 performs processing for calculating the expected processing time of the job log acquired in step S902 in FIG. In this embodiment, the expected processing time is calculated by the following formula.

[Estimated processing time (seconds)] = 60 ÷ [Monochrome printing speed (pages / min)] × [Number of monochrome pages] + 60 ÷ [Color printing speed (pages / min)] × [Number of color pages]
In step S1106, the analysis processing unit 504 determines whether the difference between the job processing time calculated in step S903 in FIG. 9 and the predicted processing time calculated in step S1105 is equal to or greater than a specified value. If the analysis processing unit 504 determines that the difference between the job processing time and the expected processing time is smaller than the specified value, the job processing time correction processing is not performed and this processing is terminated. On the other hand, if the analysis processing unit 504 determines that the difference between the job processing time and the expected processing time is equal to or greater than the specified value, the process proceeds to S1107.

  The determination in S1105 is performed to determine whether an error has occurred during the job processing time of the job. It is considered that there is an error between the time during which the image forming apparatus is purely performing job processing and the expected processing time calculated in S1105. Therefore, first, the difference between the job processing time calculated in S903 in FIG. 9 and the expected processing time calculated in S1105 is calculated. When the calculated difference is small, no error has occurred in the job processing time of the job, and it is considered that the job processing time is correct. On the other hand, if the calculated difference is large, it is considered that an error has occurred in the job processing time of the job and the job processing time includes a stop time due to the error. In this embodiment, a predetermined value is set in advance (for example, three times or more of the calculated job processing time), and if the calculated difference is equal to or larger than the predetermined value, an error has occurred in the job processing time of the job. judge.

  In step S <b> 1107, the analysis processing unit 504 sets the job processing time of the job as the predicted processing time calculated in step S <b> 1105, and ends this processing.

<Analysis result table>
FIG. 12 is a diagram illustrating an example of an analysis result table managed by the analysis processing unit 504 illustrated in FIG. This example corresponds to the analysis result table output in step S905 illustrated in FIG.

  In FIG. 12, reference numeral 1201 denotes a job log ID, which is related to the job log ID 701 in the job log information table shown in FIG. 7, and means that records with matching job log IDs are data related to the same job log. Reference numeral 1202 denotes a job processing time, which stores the job processing time calculated by the above-described analysis processing of the job processing time.

  Reference numeral 1203 denotes a record indicating the job processing time of the job shown in the job log 707 of FIG. 7, and its value is 00:00:30. Reference numeral 1204 denotes a record indicating the job processing time of the job shown in the job log 708 of FIG. 7, and its value is 00:00:24. Reference numeral 1205 denotes a record indicating the job processing time of the job shown in the job log 709 in FIG. 7, and its value is 00:00:18. Since an error has occurred during execution of the job in the job log 709, the job processing time is corrected.

  As described above, by detecting a job in which an error has occurred during execution of a job in the image forming apparatus and correcting the processing time of the job, the time during which the image forming apparatus was processing the job can be obtained more accurately. Can do.

  101 Host computer

Claims (2)

An information processing apparatus that calculates an operation time of the image forming apparatus using a total of processing times of a plurality of jobs executed in a specific period of the image forming apparatus,
An acquisition unit (S902) for acquiring job log information from the image forming apparatus;
Specifying means (S903) for specifying a job processing time from a job start time and a job end time for each job recorded in the job log information acquired by the acquisition means;
Correction means (S904) for correcting the job processing time of the job based on the number of print pages of the job recorded in the job log information acquired by the acquisition means and the printing speed of the image forming apparatus that has processed the job; An information processing apparatus comprising: In the correction means,
A calculation unit (S1105) that calculates an expected processing time of the job based on the number of print pages of the job recorded in the job log information acquired by the acquisition unit and the printing speed of the image forming apparatus that has processed the job; ,
If the difference between the job processing time of the job specified by the specifying means and the expected processing time of the job calculated by the calculating means is greater than a specified value, an error occurs in the image forming apparatus during the job processing time of the job. Determination means (S1106) for determining that the
The job processing time is corrected by substituting the job processing time of the job for which it is determined that an error has occurred in the image forming apparatus during the job processing time by the determination unit with the expected job processing time calculated by the calculation unit ( S1107). The information processing apparatus according to claim 1.