JP2017117247A - Project management device and project management method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a project management device and a project management method with which it is possible to precisely grasp the progress of a task.SOLUTION: A project management device according to the present invention comprises: a plan input unit 2 for accepting input of the plan start day and plan completion day of a task; a progress input unit 3 for accepting input of a progress rate indicating the progress of the task; a lead lag calculation unit 5 for calculating a lead lag in days indicating a lead or lag of the task in days, as referenced to the current date, on the basis of the plan start day and plan completion day, the progress rate, and the current date; a plan change detection unit 6 for detecting a change of the plan completion day, and calculating a plan completion change in days that indicates a difference in days between a changed plan completion day and the plan completion day before the change; and a display control unit 7 for exercising control so that at least a lead or lag in days is displayed. When the plan change detection unit 6 detects a change of the plan completion day, the display control unit 7 exercises control so that at least a lead or lag in days and a plan completion change in days are displayed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a project management apparatus and a project management method for managing a project including at least one task.

  Conventionally, as a means of displaying the progress of project tasks, the time axis is displayed from left to right, the planned period from the plan start date to the plan completion date is displayed as a line, and the length of the line in the planned period is displayed. Disclosed is a technology for displaying the progress and delay of a task work in the shape or color of a figure by changing the thickness from the left end of the scheduled period to a different thickness by the length of the progress rate with 100% as the progress rate (For example, refer to Patent Document 1).

JP 2002-7654 A

  In general, for example, when task work is delayed, a person in charge of the task changes the task plan (specifically, the task plan completion date is extended). The project manager manages the entire project.

  In Patent Document 1, when the task plan is changed, the progress of the task work is displayed for the changed plan. In this case, the manager of the project looks as if the task work is proceeding smoothly even though the task work is actually delayed from the original plan. Thus, it cannot be said that the project manager was able to accurately grasp the progress of the task.

  The present invention has been made to solve such problems, and an object of the present invention is to provide a project management apparatus and a project management method capable of accurately grasping the progress of a task.

  In order to solve the above problems, a project management apparatus according to the present invention is a project management apparatus for managing a project including at least one task, and receives a plan start date and a plan completion date of the task. And a progress input part that accepts the input of the progress rate indicating the progress of the task, and the progress or delay of the task based on the current date based on the plan start date, the plan completion date, the progress rate, and the current date The advance / delay calculation unit that calculates the advance / delay days indicating the number of days, and the change of the plan completion date are detected, and the plan completion change days indicating the difference between the plan completion date before the change and the plan completion date after the change are calculated In the case where the plan change detection unit detects a change in the plan completion date, and a display control unit that controls to display at least the advance / delay days. Display control unit controls to display at least a lead-lag days and Planning complete change days.

  In addition, a project management method according to the present invention is a project management method for managing a project including at least one task, wherein (a) receiving a plan start date and a plan completion date of the task; A step of accepting an input of a progress rate indicating the progress of the task, and (c) the number of days of progress or delay of the task based on the current date based on the plan start date, the plan completion date, the progress rate, and the current date A step of calculating the advance / delay days shown, and (d) a step of detecting a change in the plan completion date and calculating a plan completion change day indicating the difference between the plan completion date before the change and the plan completion date after the change. And (e) a step of controlling to display at least the number of advance / delay days, and when the change of the planned completion date is detected in step (d), the step (e) is at least the advance / delay Control so as to display the number and plan completion change the number of days.

  According to the present invention, the project management apparatus is a project management apparatus that manages a project including at least one task, and displays a plan input unit that receives input of a plan start date and a plan completion date of the task, and indicates the progress of the task. Progress input part that accepts input of progress rate, and advance / delay days indicating the number of days of progress or delay of the task based on the current date based on the plan start date, plan completion date, progress rate, and current date An advance / delay calculation unit for calculating, a plan change detection unit for detecting a change in the plan completion date, and calculating a plan completion change day indicating a difference between the plan completion date before the change and the plan completion date after the change, A display control unit that controls to display at least the advance / delay days, and when the plan change detection unit detects a change in the plan completion date, the display control unit is at least In order to control so as to display the lead-lag days and plan completion change the number of days, it is possible to accurately grasp the progress of the task.

  The project management method is a project management method for managing a project including at least one task, wherein (a) receiving a plan start date and plan completion date of the task, and (b) progress of the task. A step of accepting an input of the progress rate shown, and (c) an advance / delay indicating the number of days of progress or delay of the task based on the current date based on the plan start date, the plan completion date, the progress rate, and the current date A step of calculating the number of days, (d) a step of detecting a change in the plan completion date and calculating a plan completion change day indicating the number of days between the plan completion date before the change and the plan completion date after the change; e) at least a step of controlling to display the advance / delay days, and when the change of the planned completion date is detected in the step (d), the step (e) includes at least the advance / delay days and the total In order to control so as to display a complete change of days, it is possible to accurately grasp the progress of the task.

It is a block diagram which shows an example of a structure of the project management apparatus by Embodiment 1 of this invention. It is a figure which shows an example of the information recorded on the task plan database by Embodiment 1 of this invention. It is a figure which shows an example of the hardware constitutions of the project management apparatus by Embodiment 1 of this invention. It is a flowchart which shows an example of operation | movement of the project management apparatus by Embodiment 1 of this invention. It is a figure which shows an example of the display of the progress status of the task by Embodiment 1 of this invention. It is a figure which shows an example of the display of the progress status of the task by Embodiment 1 of this invention. It is a figure which shows an example of the information recorded on the task plan database by Embodiment 2 of this invention. It is a figure which shows an example of the display of the progress status of the task by Embodiment 2 of this invention. It is a figure which shows an example of the information recorded on the task plan database by Embodiment 3 of this invention. It is a figure which shows an example of the display of the progress status of the task by Embodiment 3 of this invention. It is a block diagram which shows an example of a structure of the project management system by embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

<Embodiment 1>
<Configuration>
FIG. 1 is a block diagram showing an example of the configuration of a project management apparatus 1 according to Embodiment 1 of the present invention.

  As shown in FIG. 1, the project management device 1 includes a plan input unit 2, a progress input unit 3, a plan completion date change input unit 4, an advance / delay calculation unit 5, a plan change detection unit 6, and display control. Part 7.

  The plan input unit 2 receives the plan start date and the plan completion date of the task input by the input device 9. Specifically, the user (for example, the person in charge of the task) inputs the planned start date and the planned completion date of the task using the input device 9. Here, examples of the input device 9 include a touch panel and hardware keys. The plan start date and the plan completion date received by the plan input unit 2 are recorded in the task plan database 8.

  The progress input unit 3 receives a progress rate indicating the progress of the task input by the input device 9. Specifically, the user inputs the task progress rate using the input device 9. Here, the progress rate refers to the ratio of the current progress with respect to all tasks. The progress rate received by the progress input unit 3 is recorded in the task plan database 8.

  The plan completion date change input unit 4 receives the changed plan completion date input by the input device 9. Specifically, the user inputs the changed plan completion date using the input device 9. In addition, when the plan completion date change input part 4 receives the plan completion date after a change, the plan completion part 2 has received the plan completion date beforehand (that is, the plan completion date received in the plan input part 2 is It is presupposed that it is recorded in the task plan database 8 in advance.

  The advance / delay calculation unit 5 performs a task operation based on the plan start date, the plan completion date, the progress rate, and the current date recorded in the task plan database 8, a date corresponding to the progress rate, And the advance / delay days indicating the days of progress or delay of the task based on the current date is calculated. The period calculated by the advance / delay calculation unit 5, the date corresponding to the progress rate, and the advance / delay days are recorded in the task plan database 8.

  The plan change detection unit 6 detects the change of the plan completion date, and calculates the change date of the plan completion date (plan completion change day) indicating the number of days between the plan completion date before the change and the plan completion date after the change. To do. Specifically, the plan change detection unit 6 includes the plan completion date (plan completion date before the change) recorded in the task plan database 8 and the plan completion date received by the plan completion date change input unit 4 (after the change). The number of days of difference from the planned completion date) is calculated. The number of days of change of the plan completion date calculated by the plan change detection unit 6 is recorded in the task plan database 8.

  The display control unit 7 performs control so that at least the advance / delay days calculated by the advance / delay calculation unit 5 are displayed on the display device 10. In addition, when the plan change detection unit 6 detects a change in the plan completion date, the display control unit 7 controls the display device 10 to display the number of days for the change in the plan completion date. Here, examples of the display device 10 include a liquid crystal display device. The input device 9 and the display device 10 may be integrally formed, such as a liquid crystal display device having a touch panel.

  As shown in FIG. 2, the task plan database 8 has a plan start date, a plan completion date, a period, a progress rate, and a date corresponding to the progress rate for each task (tasks A and B in the example of FIG. 2). Record the number of days late and the number of days to change the plan completion date. The task plan database 8 includes a storage device such as a hard disk or a semiconductor memory. In FIG. 1, the task plan database 8 is provided outside the project management apparatus 1, but may be provided inside the project management apparatus 1.

  FIG. 3 is a block diagram illustrating an example of a hardware configuration of the project management apparatus 1.

  The functions of the plan input unit 2, the progress input unit 3, the plan completion date change input unit 4, the advance / delay calculation unit 5, the plan change detection unit 6, and the display control unit 7 in the project management apparatus 1 are realized by a processing circuit. The That is, the project management apparatus 1 accepts the input of the plan start date and the plan completion date, accepts the input of the progress rate, accepts the plan completion date after the change, determines the period, the date corresponding to the progress rate, and the advance delay days And a processing circuit for controlling to display the period, the date corresponding to the progress rate, the advance delay day, and the change date of the plan completion date. The processing circuit is a processor 11 (also called a central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, DSP (Digital Signal Processor)) that executes a program stored in the memory 12.

  The functions of the plan input unit 2, the progress input unit 3, the plan completion date change input unit 4, the advance / delay calculation unit 5, the plan change detection unit 6, and the display control unit 7 in the project management apparatus 1 are software, firmware, or Realized by a combination of software and firmware. Software or firmware is described as a program and stored in the memory 12. The processing circuit reads out and executes the program stored in the memory 12, thereby realizing the function of each unit. That is, the project management apparatus 1 receives a plan start date and a plan completion date, a step for receiving a progress rate input, a step for receiving a changed plan completion date, a period, a date corresponding to the progress rate, and a progress As a result, the step of calculating the number of days delayed, the step of calculating the number of days to change the plan completion date, the period, the date corresponding to the progress rate, the number of days to advance and delay, and the step of controlling to display the number of days to change the plan completion date are executed. A memory 12 is provided for storing the program to be executed. In addition, these programs execute the procedure or method of the plan input unit 2, the progress input unit 3, the plan completion date change input unit 4, the advance / delay calculation unit 5, the plan change detection unit 6, and the display control unit 7 on a computer. It can be said that Here, the memory is, for example, non-volatile or volatile such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), etc. This includes a semiconductor memory, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, a DVD (Digital Versatile Disk), and the like.

<Operation>
FIG. 4 is a flowchart showing an example of the operation of the project management apparatus 1 according to the first embodiment. Hereinafter, a case where each piece of information shown in FIG. 2 is recorded in the task plan database 8 will be described as an example.

  In step S <b> 1, the plan input unit 2 receives input of a task plan start date and a plan completion date. For example, the person in charge of task A uses the input device 9 to input “2015/10/8 (October 8, 2015)” as the plan start date and “2015/10/30” as the plan completion date. Enter. The plan start date and the plan completion date received by the plan input unit 2 are recorded in the task plan database 8.

  In step S2, the progress input unit 3 receives an input of the progress rate. For example, the person in charge of task A uses the input device 9 to input “40%” as the progress rate. The progress rate received by the progress input unit 3 is recorded in the task plan database 8.

  In step S3, the plan change detection unit 6 determines whether or not the plan has been changed. Specifically, the plan change detection unit 6 determines that the plan has been changed when the plan completion date change input unit 4 receives an input of the changed plan completion date.

In step S <b> 4, the advance / delay calculation unit 5 calculates a period during which the task is performed based on the plan start date and the plan completion date recorded in the task plan database 8. Specifically, the advance / delay calculation unit 5 calculates a period based on the following equation (1).
Period = Plan completion date-Plan start date (1)

  In the formula (1), the period is calculated by the actual working days excluding holidays. From the formula (1), for example, the period of the task A is “16 days”. The period calculated by the advance / delay calculation unit 5 is recorded in the task plan database 8. Further, the plan start date and the plan completion date acquired by the advance / delay calculation unit 5 from the task plan database 8 are output to the display control unit 7.

In step S5, the advance / delay calculation unit 5 calculates a date corresponding to the progress rate. Specifically, the advance / delay calculation unit 5 calculates a date corresponding to the progress rate based on the following equation (2).
Date corresponding to progress rate = plan start date + period x progress rate (2)

  From the formula (2), for example, the date corresponding to the progress rate of task A is “2015/10/16”. The date corresponding to the progress rate calculated by the advance / delay calculation unit 5 is recorded in the task plan database 8 and output to the display control unit 7. The progress rate acquired by the advance / delay calculation unit 5 from the task plan database 8 is also output to the display control unit 7.

In step S6, the advance / delay calculation unit 5 calculates the advance / delay days. Specifically, the advance / delay calculation unit 5 calculates the advance / delay days based on the following equation (3).
Advance / Delay Days = Current Date-Date Corresponding to Progress Rate (3)

  In equation (3), the number of days delayed in advance is calculated as the number of working days excluding holidays. In addition, when the advance / delay days are positive, it becomes “delay days”, and when the advance / delay days is negative, it becomes “advance days”. From Formula (3), for example, the advance / delay days of task A are “delay days: 2 days”. The advance / delay days calculated by the advance / delay calculation unit 5 are recorded in the task plan database 8 and also output to the display control unit 7.

  In step S <b> 7, the display control unit 7 controls the display device 10 to display the plan start date, the plan completion date, the date corresponding to the progress rate, the current date, and the advance delay days.

  For example, the display control unit 7 controls the display device 10 to display the progress status of the task A as shown in FIG. The example of FIG. 5 shows that the progress of task A is delayed by two days from the schedule. In FIG. 5, “progress rate 40%” is displayed at the location corresponding to the date corresponding to the progress rate.

  In step S8, the plan change detecting unit 6 calculates the number of days (the number of days to change the plan completion date) between the plan completion date before the change and the plan completion date after the change. The number of days to change the planned completion date is calculated as the number of working days excluding holidays. The number of days of change of the plan completion date calculated by the plan change detection unit 6 is recorded in the task plan database 8 and output to the display control unit 7.

  In step S <b> 9, the advance / delay calculation unit 5 calculates a period during which the task is performed based on the above formula (1). From the formula (1), for example, the period of the task B is “26 days”. The period calculated by the advance / delay calculation unit 5 is recorded in the task plan database 8. Further, the plan start date and the plan completion date acquired by the advance / delay calculation unit 5 from the task plan database 8 are output to the display control unit 7.

  In step S10, the advance / delay calculation unit 5 calculates a date corresponding to the progress rate based on the above equation (2). From the formula (2), for example, the date corresponding to the progress rate of task B is “2015/10/22”. The date corresponding to the progress rate calculated by the advance / delay calculation unit 5 is recorded in the task plan database 8 and output to the display control unit 7. The progress rate acquired by the advance / delay calculation unit 5 from the task plan database 8 is also output to the display control unit 7.

  In step S11, the advance / delay calculation unit 5 calculates the advance / delay days based on the above equation (3). From equation (3), for example, the advance / delay days of task B are “advance days: 2 days”. The advance / delay days calculated by the advance / delay calculation unit 5 are recorded in the task plan database 8 and also output to the display control unit 7.

  In step S12, the display control unit 7 controls the display device 10 to display the plan start date, the plan completion date, the date corresponding to the progress rate, the current date, the advance delay date, and the plan completion date change date. .

  For example, the display control unit 7 controls the display device 10 to display the progress status of the task B as shown in FIG. In the example of FIG. 6, the plan completion date of task B is extended by 10 days, and the progress of task B is two days ahead of the schedule. In FIG. 6, “progress rate 40%” is displayed at the location corresponding to the date corresponding to the progress rate.

  In the above description, the plan input unit 2 may not accept again once the plan start date and the plan completion date are accepted. That is, once step S1 is performed, the next step S1 may be omitted.

  In the above, FIGS. 5 and 6 are shown as display examples of the progress status of the task, but the present invention is not limited to this. For example, a table as shown in FIG. 2 may be displayed.

  In the above description, the case where the period, the advance delay day, and the plan completion date change day are calculated using the actual work days excluding holidays, but is not limited thereto. For example, the period, the number of days delayed in advance, and the number of days for changing the planned completion date may be calculated as the number of days including holidays.

  As described above, according to the first embodiment, when the task plan is changed (when the task completion date of the task is changed), the change days of the plan completion date are displayed together with the advance delay days. Therefore, the project manager can accurately grasp the progress of the task.

<Embodiment 2>
In the second embodiment of the present invention, a case where the progress status is displayed for each team (group) in charge of at least one task will be described. Since the configuration and operation of the project management apparatus according to the second embodiment are the same as those of the first embodiment, detailed description thereof is omitted here. In the following description, it is assumed that the project management apparatus according to the second embodiment is the project management apparatus 1 shown in FIG.

  FIG. 7 is a diagram showing an example of information recorded in the task plan database 8 according to the second embodiment.

  As shown in FIG. 7, the task plan database 8 records a team in charge of each task. In the example of FIG. 7, team 1 is responsible for tasks A, B, and D, and team 2 is responsible for task C.

  FIG. 8 is a diagram illustrating an example of the task progress status displayed for each group. Note that tasks A to D in FIG. 8 correspond to tasks A to D in FIG. 7.

  As shown in FIG. 8, the progress status of tasks A, B, and D handled by team 1 and the progress status of task C handled by team 2 are displayed separately. In addition, the progress status of tasks A, B, and D handled by team 1 are displayed together.

  In the above description, FIG. 8 is shown as an example of displaying the progress of the task, but the present invention is not limited to this. For example, a table as shown in FIG. 7 may be displayed.

  In FIG. 8, you may display the sum total of advance delay days and the plan completion days for every team. In FIG. 7, the total advance / delay days and the plan completion days may be recorded for each team.

  In the above description, the task progress status is displayed for each team. However, the present invention is not limited to this. For example, the progress of the task may be displayed for each person in charge.

  In the above description, the case where the period, the advance delay day, and the plan completion date change day are calculated using the actual work days excluding holidays, but is not limited thereto. For example, the period, the number of days delayed in advance, and the number of days for changing the planned completion date may be calculated as the number of days including holidays.

  From the above, according to the second embodiment, the progress of the task is displayed for each team. Therefore, the project manager can accurately grasp the progress of the task for each team.

<Embodiment 3>
In the third embodiment of the present invention, a case will be described in which when the plan of one task is changed, the plan of another task subsequent to the one task is also changed. Since the configuration and operation of the project management apparatus according to the third embodiment are the same as those of the first embodiment, detailed description thereof is omitted here. In the following description, it is assumed that the project management apparatus according to the third embodiment is the project management apparatus 1 shown in FIG.

  FIG. 9 is a diagram showing an example of information recorded in the task plan database 8 according to the third embodiment.

  As shown in FIG. 9, the task plan database 8 records information on subsequent tasks. In the example of FIG. 9, the task subsequent to task A is task B.

  FIG. 10 is a diagram illustrating an example of a task progress status display. 10 shows the progress of tasks A and B before the plan is changed, and the lower part of FIG. 10 shows the progress of tasks A and B after the plan is changed. Tasks A and B after the plan is changed correspond to tasks A and B in FIG.

  As shown in FIG. 10, when the planned completion date of task A is changed, the planned start date and planned completion date of task B are also changed accordingly. As the progress status of task A, “advance days: 1 day” and “plan completion date change days: 4 days” are displayed, and as progress status of task B, “advance days: 8 days” and “plan completion” "Day change days: 4 days" is displayed.

  In the above description, FIG. 10 is shown as a display example of the progress status of the task, but the present invention is not limited to this. For example, a table as shown in FIG. 9 may be displayed.

  In the above description, the case where the period, the advance delay day, and the plan completion date change day are calculated using the actual work days excluding holidays, but is not limited thereto. For example, the period, the number of days delayed in advance, and the number of days for changing the planned completion date may be calculated as the number of days including holidays.

  From the above, according to the third embodiment, when the plan of one task is changed, the progress status of both tasks is also changed after changing the plan of other tasks following the one task. Is displayed. Accordingly, the project manager can accurately grasp the progress of one task and the progress of other tasks following the task.

  The project management apparatus described above can also be applied to an apparatus constructed as a system by appropriately combining servers and the like. In this case, each function or each component of the project management apparatus is distributed and arranged in each function for constructing the system.

  Specifically, as an example, the function of the project management apparatus can be arranged on a server. For example, as shown in FIG. 11, the user side includes an input device 9 and a display device 10, and the server 13 includes a plan input unit 2, a progress input unit 3, a plan completion date change input unit 4, an advance / delay calculation unit 5, a plan By providing the change detection unit 6, the display control unit 7, and the task plan database 8, a project management system can be constructed. Each component provided in the server 13 may be appropriately distributed and arranged in the server 13, the input device 9, and the display device 10. The task plan database 8 may be provided outside the server 13.

  Even if it is a case where it is said structure, the effect similar to said embodiment is acquired.

  Further, software (project management method) for executing the operation in the above-described embodiment may be incorporated in a server, for example.

  Specifically, as an example, the above-described project management method is a project management method for managing a project including at least one task, and (a) receiving an input of a plan start date and a plan completion date of the task; (B) accepting an input of a progress rate indicating the progress of the task, and (c) progress of the task based on the current date based on the plan start date, the plan completion date, the progress rate, and the current date. Or a step of calculating the advance / delay days indicating the days of delay, and (d) a plan completion change indicating the difference between the plan completion date before the change and the plan completion date after the change is detected. A step of calculating the number of days, and (e) a step of controlling to display at least the number of days of advance or delay. When a change in the planned completion date is detected in step (d), the number of steps (e) is small. Control so as to display the even lead-lag days and plan completion change the number of days.

  As described above, the same effect as that of the above embodiment can be obtained by operating the software that executes the operation of the above embodiment in a server.

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

  DESCRIPTION OF SYMBOLS 1 Project management apparatus, 2 Plan input part, 3 Progress input part, 4 Plan completion date change input part, 5 Advance / lag calculation part, 6 Plan change detection part, 7 Display control part, 8 Task plan database, 9 Input device, 10 Display device, 11 processor, 12 memory, 13 server.

Claims (7)

A project management device for managing a project including at least one task,
A plan input unit for receiving input of a plan start date and a plan completion date of the task;
A progress input unit that receives an input of a progress rate indicating the progress of the task;
Based on the plan start date, the plan completion date, the progress rate, and the current date, an advance / delay calculation unit that calculates the advance / delay days indicating the advance or delay days of the task based on the current date When,
A plan change detecting unit that detects a change in the plan completion date and calculates a plan completion change day number indicating a difference between the plan completion date before the change and the plan completion date after the change;
A display control unit for controlling to display at least the advance / delay days; and
With
When the plan change detection unit detects a change in the plan completion date,
The display control unit controls to display at least the advance / delay days and the plan completion change days. In the case where the project includes a plurality of the tasks, and the plan change detection unit detects a change in the plan completion date,
The said display control part is controlled to display the said advance / delay days and the said plan completion change days for every group which takes charge of at least 1 task among each said tasks, The feature of Claim 1 characterized by the above-mentioned. Project management device.   The project management apparatus according to claim 2, wherein the display control unit controls to display the total of the advance / delay days and the total of the planned completion change days for each of the groups. In the case where one task is followed by another task, and the plan change detection unit detects a change in the plan completion date of the one task,
The display control unit controls to display the advance / delay days of the one task and the planned completion change days, and controls to display the advance / delay days and the plan completion change days of the other task. The project management apparatus according to claim 1, wherein: The advance / delay calculation unit calculates the advance / delay days based on the actual working days of the task,
5. The project management apparatus according to claim 1, wherein the plan change detection unit calculates the plan completion change days based on the actual working days of the task.   6. The display control unit according to claim 1, wherein the display control unit controls to display the plan start date, the plan completion date, the current date, and a date corresponding to the progress rate. The project management apparatus according to item 1. A project management method for managing a project including at least one task,
(A) receiving an input of a plan start date and a plan completion date of the task;
(B) receiving an input of a progress rate indicating the progress of the task;
(C) calculating an advance / delay days indicating the advance or delay days of the task based on the current date based on the plan start date, the plan completion date, the progress rate, and the current date When,
(D) detecting a change in the plan completion date, and calculating a plan completion change day indicating a difference between the plan completion date before the change and the plan completion date after the change;
(E) controlling to display at least the advance delay days;
With
In the case where the change of the planned completion date is detected in the step (d),
The step (e) is controlled so as to display at least the advance / delay days and the plan completion change days.

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