A method for assisting in determining the number of electronic equipment repair tools

Abstract

The present invention discloses a method for assisting in determining the number of electronic equipment repair tools, comprising the following steps: S1, assuming that the repair process is divided into k stages, each stage uses a repair tool, the number of electronic equipment is n, the life of the electronic equipment obeys an exponential distribution, and the use time of the i-th repair tool obeys an exponential distribution; S2, initializing the number of each repair tool to 1; S3, traversing and calculating the average waiting time of each repair tool; S4, calculating the current availability, saving the current number, current availability and each waiting time of each repair tool; S5, judging whether the number of repair tools is sufficient, if not, finding the repair tool type g corresponding to the maximum value of the average waiting time, increasing the number of the g-th repair tool by 1, and then returning to step S3, if the number is sufficient, entering step S6; S6, terminating the calculation, and determining the number of each type of repair tool.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic equipment maintenance and support, and in particular to a method for assisting in determining the number of electronic equipment repair tools. Background Art

[0002] The equipment maintenance manual will indicate what types of repair tools the equipment's complete set of repair tools consists of. When a large number of equipment is put into operation, since the time each type of repair tool is used during the repair process is generally different, fewer tools can be equipped for those that are used for a short time, and more tools are needed for those that are used for a long time. Therefore, the repair tools are not equipped with the same number of tools in a 1:1 ratio. When multiple equipment are working independently at the same time, it is obviously not an economical approach to equip each equipment with a set of repair tools, especially when the repair tools include expensive repair tools.

[0003] How to reasonably determine the number of repair tools for equipment in batch use is a common problem in current maintenance and support work. Currently, it is mainly solved by relying on the work experience accumulated by front-line repair personnel over the years, which cannot provide a high-quality answer to this problem. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the technical solution adopted by the present invention is:

[0005] A method for assisting in determining the number of electronic equipment repair tools comprises the following steps:

[0006] S1, suppose the repair process is divided into k stages, each stage uses a repair tool, that is, the number of types of repair tools is k, and the number of electronic equipment is , the life of electronic equipment follows an exponential distribution , represents the mean life span, The usage time of a repair tool follows an exponential distribution , , Indicates The average usage time of the repair tools;

[0007] S2, The current number of repair tools Indicates that the number of each repair tool is initialized to 1, that is, initially , ;

[0008] S3. Calculate the average waiting time of each repair tool , ;

[0009] S4. Calculate current availability , the availability is Maintenance and repair cycle time The ratio of the current number of each repair tool is saved. , and waiting time ;

[0010] S5. Determine whether the number of repair tools is sufficient. If not, Find the type of repair tool g corresponding to the maximum value, and increase the number of the g-th type of repair tool by 1, that is, , then return to step S3, if the quantity is sufficient, proceed to step S6;

[0011] S6. Terminate the calculation and determine the quantity of various repair tools .

[0012] Further, in step S3, specifically, It is assumed that the equipment will enter the repair phase immediately after failure. The average waiting time when entering the repair phase , if there is at least one available If there are no repair tools, the waiting time is 0;

[0013] If at this time all If all the repair tools are being used to repair other equipment, you need to wait for any of the The repair phase can only begin after the repair tool has been used. work;

[0014] ;

[0015] In the formula , x represents the fault interval time, x j represents the time between the jth failure and the j-1th failure, y represents the time required for each repair, and y j Indicates the time to complete the repair of the jth fault.

[0016] Furthermore, in step S4, the current availability is calculated When:

[0017] ;

[0018] Therefore, there are:

[0019] .

[0020] Further, in step S5, when determining whether the number of repair tools is sufficient, specifically, the steady-state availability is first calculated. ;

[0021] Under steady-state availability, the waiting time of the repair tool is not considered, and we have:

[0022] ;

[0023] By comparison and , determine whether the difference between the two is less than the preset threshold. If so, it is considered that the quantity is sufficient, otherwise it is considered that the quantity is insufficient.

[0024] In addition, in step S5, when determining whether the number of repair tools is sufficient, it is determined whether each waiting time is satisfied. If both are less than the preset threshold, then the quantity is considered sufficient, otherwise it is considered insufficient.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The method for assisting in determining the number of electronic equipment repair tools provided by the present invention can assist in determining the number of repair tools and economically and reasonably meet maintenance guarantee requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic flow chart of a method for assisting in determining the number of electronic equipment repair tools provided by the present invention. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following further describes how the present invention is implemented in conjunction with the accompanying drawings and specific implementation methods.

[0029] Reference Figure 1 As shown, the present invention provides a method for assisting in determining the number of electronic equipment repair tools, comprising the following steps:

[0030] S1, suppose the repair process is divided into k stages, each stage uses a repair tool, that is, the number of types of repair tools is k, and the number of electronic equipment is , the life of electronic equipment follows an exponential distribution , represents the mean life span, The usage time of a repair tool follows an exponential distribution , , Indicates The average usage time of the repair tools.

[0031] Generally speaking, the life of electronic parts follows an exponential distribution, such as printed circuit board plug-ins, electronic components, integrated circuits, etc. The life of electronic equipment follows an exponential distribution , the density function of the exponential distribution is The present invention stipulates that the life span and repair time of the equipment are subject to exponential distribution.

[0032] It is understandable that the "lifetime of an electronic device" described in the present invention does not refer to the time until the device is scrapped, but refers to the time from when the electronic device starts working to when it needs to be repaired due to a malfunction.

[0033] S2, The current number of repair tools Indicates that the number of each repair tool is initialized to 1, that is, initially , .

[0034] S3. Calculate the average waiting time of each repair tool , .

[0035] S4. Calculate current availability Availability is the average working time of equipment within the maintenance guarantee period and the maintenance guarantee period. The ratio of the current number of each repair tool is saved. , and waiting time .

[0036] In the present invention, the life of the electronic equipment, the usage time of all repair tools and all waiting time are considered as a maintenance guarantee cycle. , and the average working time of the equipment during the maintenance guarantee period is obviously the average life of the equipment .

[0037] S5. Determine whether the number of repair tools is sufficient. If not, Find the type of repair tool g corresponding to the maximum value, and increase the number of the g-th type of repair tool by 1, that is, , then return to step S3, if the quantity is sufficient, go to step S6.

[0038] S6. Terminate the calculation and determine the quantity of various repair tools .

[0039] Further, in step S3, specifically, It is assumed that the equipment will enter the repair phase immediately after failure. The average waiting time when entering the repair phase , if there is at least one available If there are no repair tools, the waiting time is 0;

[0040] If at this time all If all the repair tools are being used to repair other equipment, you need to wait for any of the The repair phase can only begin after the repair tool has been used. work;

[0041] ;

[0042] In the formula , x represents the fault interval time, x j represents the time between the jth failure and the j-1th failure, y represents the time required for each repair, and y j Indicates the time to complete the repair of the jth fault.

[0043] Furthermore, in step S4, the current availability is calculated When:

[0044] ;

[0045] Therefore, there are:

[0046] .

[0047] Further, in step S5, when determining whether the number of repair tools is sufficient, specifically, the steady-state availability is first calculated. ;

[0048] Under steady-state availability, the waiting time of the repair tool is not considered, and we have:

[0049] ;

[0050] By comparison and , determine whether the difference between the two is less than the preset threshold. If so, it is considered that the quantity is sufficient, otherwise it is considered that the quantity is insufficient.

[0051] In another embodiment, in step S5, when determining whether the number of repair tools is sufficient, it is also possible to determine whether each waiting time is satisfied. If both are less than the preset threshold (such as 0.01 hours), if so, it is considered that the quantity is sufficient, otherwise it is considered that the quantity is insufficient. If this method is used for judgment, there is no need to calculate the availability.

[0052] In a specific embodiment, in step S1, the life of a certain type of electronic device follows the mean For 300 hours of exponential distribution, the number There are 30 machines in total; a maintenance can be divided into 3 stages, and a repair tool will be used in each stage, that is, k=3; each tool follows an exponential distribution with a mean usage time of 6 hours, 10 hours, and 3 hours, that is, , , .

[0053] In step S2, the number of the three repair tools is initialized to 1, that is, In step S3, the waiting time can be calculated. , , are 2.251 hours, 5.000 hours and 0.692 hours respectively. In step S4, the calculation is In addition, through the above formula provided by the present invention, it is possible to calculate .

[0054] In step S5, when determining whether the quantity of each repair tool is sufficient, the and , determine whether the difference between the two is less than the preset threshold (such as 0.003), or determine whether the waiting time is met are all less than a preset threshold (such as 0.01 hour).

[0055] Obviously, the above two methods are not satisfied, and the maximum waiting time is , so let the corresponding number of the second repair tools , return to step S3 and recalculate.

[0056] After multiple cycles, output the number of repair tools calculated each time , and waiting time , the results are shown in Table 1 below.

[0057] Table 1

[0058]

[0059] It can be seen from Table 1 that for the tool quantity configuration schemes calculated from the 7th to the 10th time, as the number of tools gradually increases, the effect of improving the availability of batch products is no longer significant. From an economic perspective, scheme No. 7 can be given priority, that is: configure 3 No. 1 tools, 4 No. 2 tools, and 2 No. 3 tools.

[0060] Corresponding to step S5, if the first judgment standard is adopted, that is, judging and If the difference between the two is less than the preset threshold of 0.003, then option 7 is selected. If the second judgment standard is adopted, that is, whether the waiting time is met If the waiting time is less than the preset threshold of 0.01 hours, then option 10 should be selected, that is, 4 No. 1 tools, 5 No. 2 tools, and 3 No. 3 tools. Compared with option 7, option 10 can further reduce the waiting time, but option 7 is more economical. In practical applications, the judgment criteria and thresholds can be selected according to the actual situation.

[0061] In summary, the method for assisting in determining the number of repair tools for electronic equipment provided by the present invention can assist in determining the number of repair tools and economically and reasonably meet maintenance guarantee requirements.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A method for assisting in determining the number of electronic equipment repair tools, characterized in that: The steps include: S1, suppose the repair process is divided into k stages, each stage uses a repair tool, that is, the number of repair tool types is k, and the number of electronic equipment is , the life of electronic equipment follows an exponential distribution , represents the mean life span, The usage time of a repair tool follows an exponential distribution , , Indicates The average usage time of the repair tools; S2, The current number of repair tools Indicates that the number of each repair tool is initialized to 1, that is, initially , ; S3. Calculate the average waiting time of each repair tool , ; S4. Calculate current availability , the availability is Maintenance and repair cycle time The ratio of the current number of each repair tool is saved. , and waiting time ; S5. Determine whether the number of repair tools is sufficient. If not, Find the type of repair tool g corresponding to the maximum value, and increase the number of the g-th type of repair tool by 1, that is, , then return to step S3, if the quantity is sufficient, proceed to step S6; S6. Terminate the calculation and determine the quantity of various repair tools ; In step S4, the current availability is calculated When: ； Therefore, there are: ； In step S5, when determining whether the number of repair tools is sufficient, specifically, the steady-state availability is first calculated. ; Under steady-state availability, the waiting time of the repair tool is not considered, and we have: ； By comparison and , determine whether the difference between the two is less than the preset threshold. If so, it is considered that the quantity is sufficient, otherwise it is considered that the quantity is insufficient.

2. The method for assisting in determining the number of electronic equipment repair tools according to claim 1, characterized in that: In step S3, specifically, It is assumed that the equipment will enter the repair phase immediately after failure. The average waiting time when entering the repair phase , if there is at least one available If there are no repair tools, the waiting time is 0; If at this time all If all the repair tools are being used to repair other equipment, you need to wait for any of the The repair phase can only begin after the repair tool has been used. work; ； In the formula , x represents the fault interval time, x j represents the time between the jth failure and the j-1th failure, y represents the time required for each repair, and y j Indicates the time to complete the repair of the jth fault.

3. A method for assisting in determining the number of electronic equipment repair tools, characterized in that: The steps include: S1, suppose the repair process is divided into k stages, each stage uses a repair tool, that is, the number of repair tool types is k, and the number of electronic equipment is , the life of electronic equipment follows an exponential distribution , represents the mean life span, The usage time of a repair tool follows an exponential distribution , , Indicates The average usage time of the repair tools; S2, The current number of repair tools Indicates that the number of each repair tool is initialized to 1, that is, initially , ; S3. Calculate the average waiting time of each repair tool , ; S4. Save the current quantity of each repair tool and waiting time ; S5: Determine whether each waiting time is met If both are less than the preset threshold, then the quantity is considered sufficient, otherwise it is considered insufficient. If insufficient, Find the type of repair tool g corresponding to the maximum value, and increase the number of the g-th type of repair tool by 1, that is, , then return to step S3, if the quantity is sufficient, proceed to step S6; S6. Terminate the calculation and determine the quantity of various repair tools .

Images