JP6480040B1 - Group management control device and group management control method - Google Patents

Abstract

A group management control device and a group management control method capable of processing each call in a timely manner with limited processing capability. According to one embodiment, a group management control device includes a storage unit having a first storage area for storing a first call and a second storage area for storing a second call, and the first storage area. An acquisition unit that acquires a call as an allocation target call from the storage unit in preference to the second call. The apparatus further uses a first selection method as a method of selecting a car to which the allocation target call is allocated when the acquired allocation target call is the first call, or is faster than the first selection method. The determination part which determines whether the 2nd selection method which can be performed is used is provided. When it is determined that the apparatus further uses the first selection method, the first selection unit that selects the car by the first selection method and the second selection method are determined. A second selection unit that selects the car by the second selection method. [Selection] Figure 1

Description

  Embodiments described herein relate generally to a group management control device and a group management control method.

  When an elevator user registers an elevator call from the landing, the elevator user may stop and register the call, or may register the call while passing through a ticket gate. In the former case, there is no practical problem even if the process of selecting a car to which calls are assigned is somewhat slow. On the other hand, in the latter case, if the user is not notified of the assigned car within a certain time from the call registration, the user needs to stop in the gate to confirm the assigned car, which is inconvenient for the user. Will end up. In an elevator system with a ticket gate type gate, the floor on which the gate is installed is often limited to the floor where the entrance of the building is located, and only the call registration device that stops and registers is installed on the majority of the floors.

  An elevator group management control system often controls both the former call and the latter call. However, in many group management control systems, the percentage of calls that pass through the gate is small, and many calls are registered by call registration devices (vertical buttons and landing destination floor registration devices) that are stopped and operated. . In such a call registration device, there is no significant restriction on the delay time until notification of the assigned car.

  As described above, the calls to be controlled by the group management control system include calls that require quick allocation and calls that do not require quick allocation. On the other hand, since the processing capability of the group management control system is limited, it is difficult to process all calls quickly. Therefore, there is a possibility that processing of calls that require quick allocation will be delayed.

JP-A-8-198530 Japanese Patent Laying-Open No. 2015-67437

  Therefore, an object of an embodiment of the present invention is to provide a group management control device and a group management control method that can process each call in a timely manner with limited processing capability.

  According to one embodiment, the group management control device is a storage unit that stores a call registered by a call registration device installed at an elevator hall, and a first storage area that stores a first call; A storage unit having a second storage area for storing a second call; The apparatus further includes the first call over the second call when the first call is stored in the first storage area and the second call is stored in the second storage area. An acquisition unit that preferentially acquires the allocation target call from the storage unit is provided. The apparatus further uses the first selection method as the car selection method for allocating the allocation target call when the allocation target call acquired by the acquisition unit is the first call, or uses the first selection method. A determination unit configured to determine whether to use a second selection method that can be executed at a higher speed than the method, wherein the determination is performed based on an elapsed time since the allocation target call was registered by the call registration device; Alternatively, a determination unit is provided that performs based on whether or not the first call other than the allocation target call is stored in the first storage area. The apparatus further includes a first selection unit that selects a car to which the allocation target call is assigned by the first selection method when it is determined that the first selection method is used. The apparatus further includes a second selection unit that selects a car to which the allocation target call is allocated by the second selection method when it is determined that the second selection method is used.

It is a schematic diagram which shows the structure of the group management control system of 1st Embodiment. It is a top view for demonstrating the elevator of the control object in 1st Embodiment. It is another top view for demonstrating the elevator of the control object in 1st Embodiment. It is a flowchart for demonstrating operation | movement of the group management control apparatus of 1st Embodiment. It is a figure for demonstrating operation | movement of the group management control apparatus of 1st Embodiment.

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

(First embodiment)
FIG. 1 is a schematic diagram showing the configuration of the group management control system of the first embodiment.

  The group management control system of FIG. 1 includes a group management control device 1, a destination call registration device 2, an up / down call registration device 3, and a plurality of elevator control devices 4.

  The group management control system in FIG. 1 is provided, for example, in a building in which a plurality of elevators are installed. The elevator control device 4 is provided to control the car operation of these elevators. The group management control device 1 performs group management control of these elevators via the elevator control device 4.

  The destination call registration device 2 is installed at the elevator hall of the building, and is used by the user to register the destination call of the elevator. A destination call is a call in which a user designates a destination floor.

  The up / down call registration device 3 is installed at the elevator hall of the building and is used by the user to register the up / down call of the elevator. The up / down call is a call in which the user designates the moving direction (upward or downward).

  2 and 3 are plan views for explaining an elevator to be controlled in the first embodiment.

  FIG. 2 shows, as an example, an elevator hall F1 provided on a certain floor in a building, six elevators E that can be boarded from this hall F1, and four ticket gates G for entering this hall F1. Is shown.

  FIG. 3 shows, as another example, an elevator hall F2 provided on another floor in the building, the above-described six elevators E that can be boarded from the hall F2, and four elevator halls F2 provided on the hall F2. Call registration device H is shown.

  The up / down call registration device 3 according to the present embodiment is a vertical button provided near the elevator E, and is a call registration device that stops and registers the up / down call. For example, the call registration device H in FIG. On the other hand, the destination call registration device 2 of the present embodiment is a call registration device that registers a destination call while passing through the gate G in FIG.

  The group management control system of the present embodiment may further include a landing destination floor registration device in the vicinity of the elevator E of FIG. 2 or FIG. The landing destination floor registration device is a call registration device that stops and registers a destination call. The landing destination floor registration device in the vicinity of the elevator E in FIG. 2 is used, for example, when the user gets behind the car responding to the call from the gate G. On the other hand, in the elevator hall F2 without the gate G as shown in FIG. 3, either the up / down call registration device 3 or the landing destination floor registration device is usually installed. Details of the landing destination floor registration device will be described later.

  The details of the group management control device 1 will be described below with reference to FIG. 1 again.

  The group management control device 1 includes an allocation request queue 11 that is an example of a storage unit, a request acquisition unit 12 that is an example of an acquisition unit, a determination unit 13, and a normal selection unit 14 that is an example of a first selection unit, An immediate selection unit 15 that is an example of a second selection unit and a predicted arrival time calculation unit 16 are provided. The allocation request queue 11 includes a priority allocation request queue (priority queue) 11a, which is an example of a first storage area, and a normal allocation request queue (normal queue) 11b, which is an example of a second storage area.

  The allocation request queue 11 stores destination calls registered by the destination call registration device 2 and up / down calls registered by the up / down call registration device 3. Specifically, the call from the destination call registration device 2 by the gate is stored in the priority allocation request queue 11a, and the call from the up / down call registration device 3 that does not depend on the gate and the call registration device that registers the up / down call. Calls (both stopped and scanned) are stored in the normal allocation request queue 11b. The former destination call is an example of a first call. The latter up / down call is an example of a second call.

  The priority allocation request queue 11a is a first-in first-out memory. For example, if call A is stored first in priority allocation request queue 11a and call B is stored second in priority allocation request queue 11a, allocation to call A is ahead of allocation to call B To be done. The same applies to the normal allocation request queue 11b.

  The request acquisition unit 12 acquires a destination call or an up / down call from the allocation request queue 11 as an allocation target call. The acquired allocation target call is supplied to the determination unit 13 and is subjected to processing for selecting a car to which the call is allocated.

  When the destination call is stored in the priority allocation request queue 11a and the upper and lower calls are stored in the normal allocation request queue 11b, the request acquisition unit 12 determines the destination call registered at the gate from the other calls. Is also obtained as an allocation target call from the allocation request queue 11 with priority. For example, if the destination call C is stored in the priority allocation request queue 11a and the up / down call D is stored in the normal allocation request queue 11b, the up / down call D is stored before the destination call C. However, the destination call C is acquired first and becomes the allocation target call first.

  As mentioned above, when an elevator user registers a call while passing through the gate, if the user does not notify the assigned car within a certain time from the call registration, the user will check the assigned car within the gate. It will be necessary to stop, which will inconvenience the user. According to the present embodiment, the allocation request queue 11 is provided with the priority allocation request queue 11a and the normal allocation request queue 11b, and the destination call from the destination call registration device 2 is stored in the priority allocation request queue 11a. By storing the upper and lower calls from the call registration device 3 in the normal allocation request queue 11b, it is possible to process the destination call while passing through the gate in a short time.

  When the allocation target call acquired by the request acquisition unit 12 is a destination call from the destination call registration device 2, the determination unit 13 uses a normal selection method as a method of selecting a car to which the allocation target call is allocated, Determine whether to use the immediate selection method. The normal selection method is an example of a first selection method, and the immediate selection method is an example of a second selection method.

  The normal selection method of this embodiment includes not only the waiting time and boarding time for the allocation target call, but also the estimated waiting time and boarding time for the registered destination call and the unanswered time for the registered up / down call. Since the evaluation is performed, the system as a whole can be evaluated with high accuracy for the purpose of shortening the average waiting time and boarding time. On the other hand, the immediate selection method of the present embodiment is a method of selecting an allocation car using only the ability to reach the departure floor of the allocation target call as soon as possible as an index, and therefore the accuracy for the above-mentioned purpose is low. In other words, the immediate selection method of the present embodiment is a method for performing selection processing (allocation processing) in a simpler and shorter time than the normal selection method.

  The determination unit 13 performs the above-described determination based on an elapsed time after the allocation target call is registered by the destination call registration device 2 (first determination). Specifically, when the elapsed time is equal to or longer than a predetermined time, it is determined that the immediate selection method is used.

  The determination unit 13 further performs the above determination based on whether a destination call other than the allocation target call is stored in the priority allocation request queue 11a (second determination). Specifically, when a destination call other than the allocation target call is stored in the priority allocation request queue 11a, it is determined that the immediate selection method is used.

  On the other hand, when the elapsed time is shorter than the predetermined time and the destination call other than the allocation target call is not stored in the priority allocation request queue 11a, it is determined that the normal selection method is used.

  According to the first determination, by applying the immediate selection method to the allocation target call having a long elapsed time, it is possible to avoid further delay of the allocation of the allocation target call. The allocation target call having a long elapsed time needs to promptly notify the user of the allocation car, but this can be realized by the first determination. Further, if there is an allocation target call having a long elapsed time, the allocation of the next call may be delayed, but this can be solved by the first determination.

  According to the second determination, when the destination call other than the allocation target call is registered, it is possible to avoid delaying the allocation of the destination call by applying the immediate selection method. If the number of destination calls stored in the priority allocation request queue 11a increases, the elapsed time of each destination call may increase. According to the second determination, this can be suppressed in advance.

  According to this embodiment, when the elapsed time is shorter than the predetermined time and the destination call other than the allocation target call is not registered, the normal selection method is applied, so that the car can be selected and allocated with high accuracy. It is possible to achieve both avoidance of delay. In addition, according to the present embodiment, by properly using the normal selection method and the immediate selection method, the restriction (response time until notification) that the elapsed time after the allocation target call is registered is shorter than a predetermined time, It becomes possible to observe as much as possible.

  Note that the allocation processing of the present embodiment is performed in series in order one by one without allocating a plurality of calls in parallel. The reason is to create a consistent elevator operation schedule. Therefore, the elapsed time after each call is registered tends to be long when there are many elevator users and the frequency of calls is high. According to the normal selection method and the immediate selection method of the present embodiment, this problem can be effectively dealt with.

  In addition, although the determination part 13 of this embodiment performs both 1st determination and 2nd determination, you may perform only one of 1st determination and 2nd determination. Further, when both the first determination and the second determination are executed, either the first determination or the second determination may be executed first.

  When the determination unit 13 determines that the normal selection method is to be used, the normal selection unit 14 selects a car to which the allocation target call is assigned by the normal selection method. On the other hand, when the determination unit 13 determines that the immediate selection method is to be used, the immediate selection unit 15 selects a car to which the allocation target call is assigned by the immediate selection method. The car selection result by the normal selection unit 14 and the immediate selection unit 15 is used for controlling the car operation by the elevator control device 4 and is displayed by the destination call registration device 2.

  When the allocation target call acquired by the request acquisition unit 12 is an up / down call from the up / down call registration device 3, the group management control device 1 uses any method to select a car to which the allocation target call is allocated. May be. In this case, for example, it is conceivable to select the allocation car by an existing method. In the present embodiment, when the allocation target call is an up / down call, the normal selection unit 14 executes the allocation process for the allocation target call.

  Also, if the next destination call is registered from the gate while the destination selection or up / down call is being processed by the normal selection unit 14, the allocation processing being executed is interrupted and the allocation processing being executed is interrupted. It is also possible to switch the call for determining the assigned car to the immediate selection method and immediately process it, and then move to the next destination call assignment process.

  The details of the normal selection method and the immediate selection method will be described below.

  In the normal selection method of the present embodiment, the waiting time of each destination call and the registered destination call and up / down call, the assigned destination call and up / down call, and the newly registered destination call (call to be assigned) and Prediction of boarding time and unanswered time for each up / down call Then, by combining these predicted times, a comprehensive evaluation value for selecting a car to which the allocation target call is assigned is calculated, and a car to which the allocation target call is assigned is selected based on this evaluation value. In the normal selection method of the present embodiment, not only the allocation target call but also all calls for which service has not ended are targeted for evaluation, so that the most efficient car as a whole system can be selected.

  Therefore, the group management performance such as waiting time and boarding time can be improved by performing the allocation process by the normal selection method as much as possible. However, in the normal selection method, when calls are registered one after another at the gate (for example, work hours), there is a possibility that the processing may not be in time. In other words, even if the group management performance is good, there is a possibility that an uncomfortable elevator system that cannot smoothly pass through the gate can be obtained. In order to avoid such discomfort, an immediate selection method is adopted in this embodiment. This makes it possible to quickly select an assigned car even if the group management performance is sacrificed to some extent.

  In the immediate selection method of this embodiment, the waiting time of a destination call is predicted only for a newly registered destination call (assignment target call). Then, using the estimated waiting time, an evaluation value for selecting the car to which the allocation target call is assigned is calculated, and the car to which the allocation target call is assigned is selected based on this evaluation value. In the immediate selection method of the present embodiment, only the allocation target calls are evaluated, and other calls that have not been serviced are not evaluated. Therefore, the evaluation can be performed in a short time.

  Further, in the immediate selection method, the time required for each car to arrive at each floor from the present time is calculated in advance periodically as the predicted arrival time. When the allocation process by the immediate selection method is started, an allocation car is selected using the calculated predicted arrival time. Specifically, the car having the earliest estimated arrival time that arrives at the departure floor where the call to be assigned is registered is selected as the assigned car. Thereby, the allocation process can be further speeded up. The predicted arrival time is calculated by the predicted arrival time calculation unit 16.

  In this case, since the assigned car is selected using the predicted arrival time predicted in advance, there is a possibility that an error may occur in the prediction because the call is registered after the prediction. In addition, in the immediate selection method, other calls that are not serviced are not subject to evaluation. Therefore, if the elevator operation is continued for a long time, the group management performance may be degraded. Therefore, in this embodiment, the normal selection method is used with priority over the immediate selection method.

  In order to reduce the weak point of the immediate selection method, a car scheduled to stop on the departure floor and the destination floor of the allocation target call may be used. Specifically, the immediate selection unit 15 has a plan to stop at the departure floor and destination floor of the allocation target call, and there is a car whose planned stoppage to the destination floor is after the planned stoppage to the departure floor. When assigning, a call to be assigned is assigned to a car having such a schedule. In this case, even if this allocation is added, the car stop floor does not increase, so that the possibility that the immediate selection method deteriorates the group management performance can be reduced. In addition, the fact that there is a plan to stop in a certain car is considered that there is a certain degree of rationality in selecting this car.

  Based on the above concept, this embodiment prepares two allocation processes, a normal selection method and an immediate selection method. Therefore, according to the present embodiment, it is possible to realize the group management control device 1 that can process each call in a timely manner with limited processing capability. For example, while ensuring the group management performance as much as possible, it is possible to quickly notify a call that needs to be quickly notified of the assigned car.

  FIG. 4 is a flowchart for explaining the operation of the group management control device 1 of the first embodiment.

  If a call is stored in the allocation request queue 11 (S1), it is determined whether there is a call with a high priority, that is, whether a destination call is stored in the priority allocation request queue 11a. (S2).

  If the destination call is not stored in the priority allocation request queue 11a and the up / down call is stored in the normal allocation request queue 11b, the normal selection unit 14 operates to execute the up / down call allocation process. It is determined whether or not it is in progress, that is, whether or not the normal selection unit 14 is executing another call assignment process (S3). When the normal selection unit 14 is not in operation, the request acquisition unit 12 acquires the upper and lower calls as allocation target calls (S4), and the normal selection unit 14 performs allocation processing for the allocation target calls (S5).

  On the other hand, when the destination call is stored in the priority allocation request queue 11a, the request acquisition unit 12 acquires the destination call as the allocation target call (S11). Then, in order to execute the destination call allocation process, it is determined whether or not the normal selection unit 14 is operating, that is, whether or not the normal selection unit 14 is executing another call allocation process (S12).

  When the normal selection unit 14 is operating, the determination unit 13 interrupts the allocation process of another call that is being executed by the normal selection unit 14, and after the call for which the allocation process has been interrupted is input to the immediate selection unit 15 (S17), the process proceeds to step S13. As a result, the interrupted allocation process is executed by the immediate selection unit 15 by the immediate selection method, and the normal selection unit 14 is ready to start the allocation process for the allocation target call. On the other hand, when the normal selection unit 14 is not operating, the process proceeds to step S13 without passing through step S17.

  In S13, it is determined whether another destination call is stored in the priority allocation request queue 11a. If another destination call is stored, the immediate selection unit 15 performs allocation processing for the allocation target call (S15). On the other hand, if another destination call is not stored, the process proceeds to step S14.

  In S14, it is determined whether or not the elapsed time since the allocation target call is registered by the destination call registration device 2 is equal to or longer than the time specified in advance. This designated time corresponds to an example of the predetermined time described above. If the elapsed time is equal to or longer than the specified time, the immediate selection unit 15 performs allocation processing for the allocation target call (S15). On the other hand, when the elapsed time is less than the specified time, the normal selection unit 14 performs allocation processing for the allocation target call (S16).

  In addition to the destination call registration device 2 and the upper / lower call registration device 3, the group management control system of the present embodiment may include a landing destination floor registration device that stops and registers a destination call as described above. . In this case, it is desirable that the destination call registered by the landing destination floor registration device is stored in the normal allocation request queue 11b, similarly to the up / down call from the up / down call registration device 3. The reason is that the destination call from the landing destination floor registration device is not registered while the user passes through the gate, so that it is not necessary to quickly notify the assigned car. The destination call from the landing destination floor registration device is an example of the second call, similar to the up / down call from the up / down call registration device 3.

  FIG. 5 is a diagram for explaining the operation of the group management control device 1 of the first embodiment.

  FIG. 5 shows, as an example, three elevators such as No. A, No. B, and No. C installed in the building. FIG. 5 further shows a case where the allocation target call is a destination call from the first floor to the tenth floor. The HDC shown in FIG. 5 is a landing destination floor registration device installed in an elevator hall on the first floor. Reference numerals B1 and C1 indicate the planned stoppage floors at the time of the next upward movement of the cars of Units B and C, respectively. The circle of No. A indicates the call of the destination floor of the user on board, and the triangle of No. A to C indicates the departure floor (upward direction) of the assigned destination call.

  In the present embodiment, by combining the normal selection method and the immediate selection method, the time from registration of the destination call to the display of the assigned car can be prevented from becoming too long. Convenience can be improved. On the other hand, if the immediate selection method is frequently used, the group management performance may be degraded. Therefore, in the present embodiment, the following method may be employed in order to suppress a decrease in group management performance due to the immediate selection method.

  First, the number of people assigned is recorded continuously for each car. In this case, a car with a large number of reservations and expected to be crowded is excluded from allocation candidates during the allocation process. For example, when there are a large number of reservations for Unit B, Unit B is excluded from allocation targets. Whether each car is removed from the assignment candidates during the assignment process by updating the record of the number of reserved people in each car every time one assignment is completed or one car response is completed It becomes possible to judge quickly.

  Second, in the allocation process by the immediate selection method, as described above, a car scheduled to stop at the departure floor and the destination floor of the allocation target call may be used. For example, in the case where the allocation target call is a destination call from the first floor to the tenth floor, the cars scheduled to stop on the first floor and the tenth floor are used when moving up. In FIG. 5, since Unit B is going down to the 1st floor and then going up to the 10th floor, the allocation target call is assigned to Unit B. Thereby, since the immediate selection method can be executed without adding a stop floor, the possibility that the immediate selection method deteriorates the group management performance can be reduced.

  Third, when there is no car scheduled to stop at the departure floor and destination floor of the allocation target call, the estimated arrival time calculated periodically is used. Specifically, the allocation target call is allocated to the car having the earliest predicted arrival time at the departure floor of the allocation target call. In FIG. 5, since the C machine is scheduled to arrive at the first floor the earliest, the allocation target call is allocated to the C machine.

  As described above, in this embodiment, the allocation request queue 11 is provided with the priority allocation request queue 11a and the normal allocation request queue 11b, and the destination call from the destination call registration device 2 is stored in the priority allocation request queue 11a. By storing the up / down calls from the up / down call registration device 3 in the normal allocation request queue 11b, it is possible to process the destination call while passing through the gate in a short time.

  In addition, in this embodiment, by adopting two allocation processes, the normal selection method and the immediate selection method, the group management performance is ensured as much as possible, and the call for which the allocation car must be notified quickly can be quickly performed. Notification can be made.

  Thus, according to the present embodiment, it is possible to realize the group management control device 1 that can process each call in a timely manner with limited processing capability.

  Although several embodiments have been described above, these embodiments are presented as examples only and are not intended to limit the scope of the invention. The novel apparatus and methods described herein can be implemented in a variety of other forms. In addition, various omissions, substitutions, and changes can be made to the forms of the apparatus and method described in the present specification without departing from the spirit of the invention. The appended claims and their equivalents are intended to include such forms and modifications as fall within the scope and spirit of the invention.

  1: Group management control device, 2: Destination call registration device, 3: Up / down call registration device, 4: Elevator control device, 11: Assignment request queue, 11a: Priority assignment request queue, 11b: Normal assignment request queue, 12 : Request acquisition unit, 13: determination unit, 14: normal selection unit, 15: immediate selection unit, 16: predicted arrival time calculation unit

Claims (8)

A storage unit for storing a call registered by a call registration device installed at an elevator hall, the storage unit having a first storage area for storing a first call and a second storage area for storing a second call And
When the first call is stored in the first storage area and the second call is stored in the second storage area, the first call is given priority over the second call. An acquisition unit to acquire as an allocation target call from the unit;
When the allocation target call acquired by the acquisition unit is the first call, the first selection method is used as a car selection method to which the allocation target call is allocated, or at a higher speed than the first selection method. A determination unit configured to determine whether to use an executable second selection method, wherein the determination is performed based on an elapsed time since the allocation target call is registered by the call registration device; or A determination unit that performs based on whether or not the first call other than the allocation target call is stored in a storage area;
A first selection unit that selects, by the first selection method, a car to which the call to be allocated is assigned when it is determined that the first selection method is used;
A second selection unit that selects, by the second selection method, a car to which the allocation target call is assigned when it is determined that the second selection method is used;
Equipped with a,
The determination unit determines to use the second selection method when the elapsed time is equal to or longer than a predetermined time, or when the first call other than the allocation target call is stored in the first storage area. A group management control device. In the first and second selection methods, an evaluation value for selecting a car to which the allocation target call is assigned is calculated, and the selection is performed based on the evaluation value.
In the first selection method, the evaluation value is calculated taking into consideration evaluations for calls other than the allocation target call, and in the second selection method, calculation is performed without considering evaluations for calls other than the allocation target call. To be
The group management control device according to claim 1. An estimated arrival time calculating unit for calculating an estimated arrival time required for each car to arrive at each floor from the present time;
The group management control device according to claim 1, wherein the second selection unit performs the selection based on the predicted arrival time at which each car arrives at a departure floor of the allocation target call. The second selection unit has a plan to stop at a departure floor and a destination floor of the allocation target call, and there is a car whose stoppage to the destination floor is after the stoppage to the departure floor. , Assign the allocation target call to the car having the schedule,
The group management control device according to any one of claims 1 to 3. The determination unit, when the allocation target call acquired by the acquisition unit is the first call, interrupts the allocation of another call that is being executed by the first selection unit, and calls that interrupt the allocation. , The first selection unit starts the allocation of the allocation target call,
The group management control device according to any one of claims 1 to 4. The determination unit determines to use the first selection method when the elapsed time is shorter than a predetermined time and the first call other than the allocation target call is not stored in the first storage area. The group management control device according to any one of claims 1 to 5. When storing the call registered by the call registration device installed in the elevator hall in the storage unit, the first call is stored in the first storage area of the storage unit, and the second call is stored in the second storage area of the storage unit. Store two calls,
When the first call is stored in the first storage area and the second call is stored in the second storage area, the first call is given priority over the second call. From the department as a call for allocation,
When the allocation target call acquired from the storage unit is the first call, the first selection method is used as a car selection method to which the allocation target call is allocated, or at a higher speed than the first selection method. Whether to use an executable second selection method is determined based on an elapsed time since the allocation target call is registered by the call registration device, or in the first storage area other than the allocation target call Determine based on whether the first call is stored,
When it is determined that the first selection method is used, a car to which the allocation target call is assigned is selected by the first selection method,
When it is determined that the second selection method is to be used, a car to which the allocation target call is assigned is selected by the second selection method.
Look at including it,
In the determination, it is determined that the second selection method is used when the elapsed time is equal to or longer than a predetermined time or when the first call other than the allocation target call is stored in the first storage area. that, group management control method. In the determination, it is determined that the first selection method is used when the elapsed time is shorter than a predetermined time and the first call other than the allocation target call is not stored in the first storage area. The group management control method according to claim 7.

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