WO2005106690A1 - Itシステムの設計支援システムおよび設計支援方法 - Google Patents
Itシステムの設計支援システムおよび設計支援方法 Download PDFInfo
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- G—PHYSICS
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q30/00—Commerce
- G06Q30/02—Marketing; Price estimation or determination; Fundraising
- G06Q30/0283—Price estimation or determination
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/08—Probabilistic or stochastic CAD
Definitions
- the present invention relates to a design support system and a design support method for an IT system configured by a computer network such as an online transaction system.
- FIG. 1 is an explanatory diagram of the above-mentioned discrete simulation.
- FIG. 1 shows a model of a certain target system.
- the model shows an event in which queues 101 to 105 occur for a plurality of processing units (circles in FIG. 1). It is a multi-stage queuing model.
- transactions are added to the queue with the number of arrivals of transactions per unit time ⁇ 1 to ⁇ 5.
- the processing for the transaction is executed with the number of transactions processed (processing performance) ⁇ 1 to 5 per unit time.
- the number of transactions arriving per unit time ⁇ 1 to 5 and the number of transactions processed per unit time (processing performance) ⁇ 1 to 5 are parameters (variable elements) in the discrete simulation.
- FIG. 2 shows a system for supporting design of system processing performance using a conventional discrete simulation. It is a processing flowchart of a system.
- the components of the system the connections between the components, the processing process of the components, the processing performance of the components, the probability of branching the output at each node, the basic system plan.
- a model of the basic system plan is created (S1), a discrete simulation is performed, and the system processing performance is evaluated (S2).
- step S3 it is determined whether the system processing performance satisfies the design standard value. If the system processing performance does not satisfy the design standard value, the simulation result power also extracts the bottleneck portion of the system and examines an improvement plan. (S4). Then, returning to step S1, a model of the improvement plan is created, and the processing of steps S1 to S3 is performed again, and the processing is repeated until the system processing performance satisfies the design standard value. If the system processing performance satisfies the design standard value in the judgment of step S3, it is adopted as a system plan (S5).
- fault tree analysis is often used in system reliability design.
- a trouble event is assumed and the probability Is calculated, and the fact that the probability of occurrence of the relevant trouble hardly occurs is analyzed quantitatively.
- the main analysis method used at that time is called force fault tree analysis, which is used in reliability engineering and related fields, and is also used for IT systems (Japanese Patent Laid-Open No. 2003-67043) And Kenji Kitagawa, “Latest Design Examination Technology,” published by Techno System Co., Ltd., December 4, 1987 (second edition)).
- FIG. 3 is a processing flowchart of a conventional system reliability design support system using a fault tree analysis.
- the components of the system In the conventional system reliability design support system, the components of the system, the connections between the components, the processing processes of the components, the failure rates of the components (or subsystems) and failure modes, the components (or subsystems) ) And the failure mode mission, component devices (or subsystems) and failure mode mission time, common failure causes, basic system proposals, and design data for failure probability based on input data.
- a system stoppage or an unfavorable event in operation or operation of a target system is defined as a top event, and an event for which a factor cannot be obtained any more is defined as a basic event.
- the fault tree data created by inputting or editing in step S11 is converted into a logical expression by Boolean algebra (S12). Then, the failure probability of the basic event is substituted for the Boolean algebra derived in step S12, and the failure probability of the top event is calculated (S13). Next, it is determined whether or not the system failure probability satisfies the design criterion value (S14) . If the system failure probability does not satisfy the design criterion value, the failure probability of the top event determined in step S13 is added to each basic event. Analyze the degree of importance of the force that affects the force S, calculate the contribution of the failure probability of the top event by changing the failure probability of the basic event, and consider an improvement plan (S15).
- step S11 a fault tree structure of the improvement plan is created, and a series of operations from step S11 to step S14 are repeated until the system failure probability satisfies the design standard value. If the system failure probability satisfies the design standard, it is adopted as a system plan (S16). Disclosure of the invention
- the expert of the system processing performance and the design of the system reliability are performed by experienced experts, even if the expert of the system processing performance is designed, the expert of the design of the system reliability is required. Not limited to this, even a system reliability design expert is not limited to a system processing performance design expert. Therefore, even if the designed system satisfies the system processing performance design specification but does not satisfy the system reliability design specification, or conversely, the system processing performance design specification does not satisfy the system reliability design specification. May not meet specifications. In addition, even if the system processing performance design specifications are satisfied, the system reliability is considerably over-specified and the cost exceeds an allowable range, or even if the system reliability design specifications are satisfied, the system processing performance is considerably over-specified. In some cases, the cost may exceed the allowable range, so that the number of re-design operations is increased, and the burden on the designer is greatly increased.
- the present invention reduces the burden on the designer and satisfies both the design specifications for system processing performance and the design specifications for system reliability, and enables the design of an IT system capable of designing such that the cost falls within an allowable range. It is an object to provide a support system and a design support method.
- the IT system design support system of the present invention includes an input data part for inputting data necessary for designing an IT system, and a system plan that satisfies a design reference value of processing performance based on the data from the input data part.
- a processing performance evaluation unit to be created a reliability evaluation unit to create a system plan that satisfies the design standard value of the failure probability based on the data from the input data unit, and a processing performance evaluation unit and the reliability evaluation unit
- a cost evaluator for evaluating the cost of the proposed system and a system plan data storage for storing the system plan created by the processing performance evaluator and the reliability evaluator and the cost evaluated by the cost evaluator.
- a cost determining unit that determines whether or not there is a system plan for which the cost evaluated by the cost evaluating unit is within an allowable range.
- Ann Do determined as the design standard value of the performance when the design standard value and cost tolerance of failure probability
- a resetting section that resets the input data section.
- the IT system design support method includes the steps of inputting data necessary for designing an IT system, creating a system plan that satisfies a design standard value of processing performance based on the input data, and Create a system plan that satisfies the failure probability design criterion, and evaluate the cost of the system plan that satisfies the processing criterion design criterion and the system plan that satisfies the failure probability design criterion. Judgment of whether the system plan is a certain force or not, and if it is judged that there is no system plan that satisfies the cost tolerance, resets the processing performance design standard, the failure probability design standard, and the cost tolerance. Then, a system plan that satisfies the cost tolerance is obtained.
- FIG. 1 is an explanatory diagram of a discrete simulation.
- FIG. 2 is a processing flowchart of a conventional design support system for system processing performance using discrete simulation.
- FIG. 3 is a block diagram showing a processing function configuration of a conventional system reliability design support system using fault tree analysis.
- FIG. 4 is a block diagram of an IT system design support system according to an embodiment of the present invention.
- FIG. 5 is an explanatory diagram of input information in the IT system design support system according to the embodiment of the present invention.
- FIG. 6 is a flowchart showing processing contents of a data processing operation unit in the IT system design support system according to the embodiment of the present invention.
- FIG. 7 is a flowchart showing the processing contents of a processing performance evaluation unit in the IT system design support system according to the embodiment of the present invention.
- FIG. 8 is a model diagram showing an example of a model of a system plan created by a processing performance evaluation unit according to the embodiment of the present invention.
- FIG. 9 is a graph showing an example of a result of dependence of system processing performance on the number of transaction arrivals in a simulation of a processing performance evaluation unit according to the embodiment of the present invention.
- FIG. 10 shows a case where the bottleneck portion extracted by the processing performance bottleneck extraction processing in the processing performance evaluation unit according to the embodiment of the present invention is superimposed on the model diagram shown in FIG. 8 and displayed. model figure.
- FIG. 11 is a graph showing an example of a result of dependence of system processing performance on the number of transaction arrivals in an improvement plan in a simulation of a processing performance evaluation unit according to the embodiment of the present invention.
- FIG. 12 is a plan for improving a processing performance evaluation unit according to an embodiment of the present invention.
- the processing performance per server is 1,000.
- FIG. 12 is a plan for improving a processing performance evaluation unit according to an embodiment of the present invention.
- the processing performance per server is 1,000.
- FIG. 13 is a plan for improving the processing performance evaluation unit according to the embodiment of the present invention, in the case where an AP server with a processing performance per CPU of 4 CPUs per 1000 cases / minute is prepared.
- FIG. 13 is a plan for improving the processing performance evaluation unit according to the embodiment of the present invention, in the case where an AP server with a processing performance per CPU of 4 CPUs per 1000 cases / minute is prepared.
- FIG. 14 is a graph showing an example of data on the number of servers in processing performance per one server group used in the evaluation by the processing performance evaluation unit according to the embodiment of the present invention.
- FIG. 15 is a graph showing an example of data on the number of CPUs of the processing performance per one multi-CPU server used in the evaluation by the processing performance evaluation unit according to the embodiment of the present invention.
- FIG. 16 is a flowchart showing processing contents of a reliability evaluation unit 22 according to the embodiment of the present invention.
- FIG. 17 is an explanatory diagram showing an example of a calculation result of a fault tree and a failure probability of a system created by the reliability evaluation unit according to the embodiment of the present invention.
- FIG. 18 is an explanatory diagram showing an example of a calculation result of a fault tree and a failure probability of a system in the improvement plan created by the reliability evaluation unit according to the embodiment of the present invention.
- FIG. 19 is a flowchart showing the processing contents of a cost evaluation unit in the IT system design support system according to the embodiment of the present invention.
- FIG. 4 is a block diagram of an IT system design support system according to the embodiment of the present invention.
- Database 5 has an IT system It stores data necessary for the design of the system, for example, data related to system function configuration information, processing performance related information, reliability related information, and cost related information.
- the system design evaluation section 1 is composed of a data input section 2, a data processing operation section 3, and a data output section 4.
- the data input section 2 is based on a database 5, and includes system function configuration information, processing performance related information, and reliability related information. Then, data related to the cost-related information is input, input processed, and output to the data processing operation unit 3.
- the data processing calculation unit 3 calculates a system plan that satisfies both the design specification of the system processing performance and the design specification of the system reliability and has a cost within an allowable range, and outputs the calculation to the data output unit 4. .
- the user terminal 6 is connected to the system design evaluation section 1 and issues various instructions to the system design evaluation section 1 and displays various information.
- the data processing operation unit 3 includes a processing performance evaluation unit 21 that creates a system plan that satisfies a design reference value for processing performance based on data from the input data unit 2, and a data from the input data unit 2.
- a reliability evaluation unit 22 that creates a system plan that satisfies the design standard value of the failure probability, a processing performance evaluation unit 21 and a cost evaluation unit 23 that evaluates the cost of the system plan created by the reliability evaluation unit 22.
- the system plan data storage unit 25 that stores the system plan created by the processing performance evaluation unit 21 and the reliability evaluation unit 22 and the cost evaluated by the cost evaluation unit 23, and the cost evaluated by the cost evaluation unit 23
- a cost determination unit 24 for determining whether or not a system plan within an allowable range has a certain power. Cost tolerance It consists resetting unit 26 for resetting the input data section 2.
- FIG. 5 is an explanatory diagram of input information in the IT system design support system according to the embodiment of the present invention.
- the input data input to the data input unit 2 includes system function configuration information 10, processing performance-related information 11, reliability-related information 12, cost-related information 13, and system design standard information 14.
- the system function configuration information 10 includes constituent devices, connections between the constituent devices, and processing processes of the constituent devices.
- the processing performance related information 11 includes the fluctuations in the number of incoming transactions, the processing performance of the constituent devices, the probability of branching of the output at each node, the dependence of the processing performance of each server on the number of CPUs, and the processing performance of each server group. Including the number of servers.
- Reliability-related information Information 12 describes the failure rate of the component (or subsystem) and failure mode, the mission of the component (or subsystem) and failure mode, the mission time of the component (or subsystem) and failure mode, and the common cause failure factor. Including.
- the cost-related information 13 includes the equipment costs of the component (or subsystem), the loss amount of the system stoppage, the system downtime, the loss amount of the component (or the subsystem) and the failure mode.
- the system design standard information 14 includes a basic system plan, a design standard value for processing performance, a design standard value for a failure probability, and an allowable range of cost.
- FIG. 6 is a flowchart showing the processing content of the data processing calculation unit 3 in the IT system design support system according to the embodiment of the present invention.
- the data processing operation unit 3 receives the input data from the data input unit 2, and the processing performance evaluation unit 21 creates a system plan that satisfies the design reference value of the processing performance (S21).
- the reliability evaluation unit 22 creates a system plan that satisfies the design standard value of the failure probability (S22).
- the cost evaluation unit 23 evaluates the cost of the created system plan that satisfies the design standard values of the processing performance and the failure probability (S23), It is determined whether a plan has been made (S24).
- the system plan data storage unit 25 stores the data of the system plan created by the processing performance evaluation unit 21, the reliability evaluation unit 22, and the cost evaluation unit 23, and outputs the data to these units for use or reference. You can do it.
- the data input unit 2 also outputs input data to the processing performance evaluation unit 21, the reliability evaluation unit 22, and the cost evaluation unit 23 so that they can be used and referenced.
- the resetting unit 26 uses the system design standard information 14 to allow the cost, the failure probability design standard value, and the processing performance design standard.
- the values or basic system plan are reset, and the system function configuration information 10, processing performance related information 11, reliability related information 12, and cost related information 13 are also reset, and the process from step S21 to step S24 is performed again. Do. Steps S21 to S24 are repeated until a system plan that satisfies the design reference values of the processing performance and the failure probability and the allowable range of the cost is created.
- FIG. 7 is a flowchart showing the processing content of the processing performance evaluation unit 21 in the IT system design support system according to the embodiment of the present invention.
- the processing performance evaluation unit 21 creates a model of the basic system plan based on the input data from the data input unit 2 (S30), and performs a discrete simulation to evaluate the system processing performance (S31). Next, it is determined whether the system processing performance satisfies the design standard value (S32). If the system processing performance does not satisfy the design standard value, the bottleneck part of the system is extracted from the simulation result data to propose an improvement plan. Consider (S33).
- step S30 a model of the improvement plan is created, a series of operations from step S30 to step S32 are performed, and the process is repeated until the system processing performance satisfies the design standard value.
- step S32 If the system processing performance satisfies the design standard value in step S32, the system plan is adopted as system plan data A (S34), and system plan data A is stored in system plan data storage unit 25. After that, the process proceeds to the reliability evaluation unit 22.
- FIG. 8 is a model diagram showing an example of a model of the system plan created by the processing performance evaluation unit 21 according to the embodiment of the present invention.
- An example of the model diagram shown in Fig. 8 is the Internet 40, LAN (Local Area Network) 41-47, FW (Fire Wall) 48-51, Web server 52-59, AP (Application) server 60-61, DB (Data Base) This is a model of the basic system plan composed of servers 62 to 64.
- the design standard value of the system processing performance is 8000 Z minutes
- FW transaction processing performance is 6000 Z minutes Z units
- Web server transaction processing performance is 3000 Z minutes Z units
- the processing performance of the AP server's transaction is 2,000 for Z
- the transaction performance of the DB server is 18000 for Z
- the LAN processing performance is 12,000 for Z.
- the processing performance evaluation unit 21 uses these as input data to perform a discrete simulation to evaluate the system processing performance.
- FIG. 9 is a graph showing the results of the dependence of the system processing performance on the number of transaction arrivals in the simulation performed by the processing performance evaluation unit 21 in this case.
- the system processing performance saturates at 4000 cases Z, and the system processing performance is set at the design standard value. There are 8000 cases that do not reach Z minutes. This is because there are only two AP servers with transaction processing performance of 2000 APs / Z!
- FIG. 10 is a model diagram in which the bottleneck portion extracted in the processing performance bottleneck extraction process (S 33) in the processing performance evaluation unit 21 is superimposed on the model diagram shown in FIG. You. As shown in Fig. 10, it can be concluded that the AP servers 60 and 61 are bottlenecks.
- the transaction performance of the AP Sano 60 and 61 transactions was increased by 2000 to Z times and increased to Z level, and then improved, and the transaction of the system processing performance arrived again by the simulation in the processing performance evaluation unit 21. You will get the result of dependence on numbers. For example, this is an improvement plan in which the transaction processing performance of the AP servers 60 and 61 is increased to 2000 units for Z units and 4000 units for Z units for Z units.
- FIG. 11 is a graph showing the results of the dependence of the system processing performance on the number of transaction arrivals in the simulation performed by the processing performance evaluation unit 21 in that case.
- the processing performance of the transaction is 4000 cases, and the number of AP servers is 2 for Z. Therefore, the system processing performance is the capacity that saturates in 8000 cases. Minutes have been achieved. Therefore, it is adopted as system plan data A and stored in the system plan data storage unit 25.
- the transaction processing performance of the AP servers 60 and 61 is changed to Z units corresponding to 4000 cases, but in this case, there are three ideas for improvement.
- the first idea is to simply change the AP server to one with a processing performance of 4000 units or more and Z units or more.
- the second concept is to consider the AP server in the model diagram of the system plan in Fig. 8 as a group of several servers, and to increase the processing performance per server group to 4000 or more minutes. It is to change to. For example, as shown in FIG. 12, four servers 70 to 73, each having a processing performance of 1000 cases per server, are prepared as one AP server group.
- the third concept is to consider the AP servers 60 and 61 in the model diagram of the system plan shown in Fig. 8 as a multi-CPU server in which several CPUs are aggregated, and to improve the processing performance per server. Change to 4000 or more Z minutes. For example, as shown in Fig. 13, an AP server consisting of four CPUs 74 to 77 with a processing performance of 1000 Prepare a server.
- the system plan data of these three concepts is stored in the system plan data storage unit 25 as the system plan data, so that the reliability evaluation unit 22 can select any of them.
- system plan data for each server of the system plan, a system plan with these three ideas can be selected.
- the number of servers and the number of CPUs can be changed with little change in the processing performance of each server part, so that the failure probability of the system can be changed while maintaining the design specification value of the system processing performance. .
- FIG. 12 is an example in the case where the processing performance per one server group is proportional to the number of servers.
- the processing performance per one server group depends on various factors. However, it is known that as the number of servers increases and the increase slows down, it becomes in proportion. Therefore, in this case, for each server group, referring to the data on the number of servers depending on the processing performance per server group as shown in Fig. 14, the processing performance of each server group is determined. Determine a more realistic value for the required number of servers.
- FIG. 13 shows an example in which the processing performance of one multi-CPU server is proportional to the number of CPUs.
- the processing performance of one multi-CPU server is: It is known that, due to various factors, the number of CPUs increases and the increase slows down and becomes non-proportional. Therefore, in this case, the CPU required for the processing performance of each server is referred to by referring to the data on the number of CPUs of the processing performance per server as shown in Fig. 15 for each server. Determine a more realistic value for the number.
- FIG. 16 is a flowchart showing the processing content of the reliability evaluation unit 22 according to the embodiment of the present invention.
- the reliability evaluation unit 22 creates a fault tree (S80), converts the fault tree into a logical expression (S81), calculates the system failure probability (S82), and determines whether the system failure probability satisfies the design criteria. (S83), and if the system failure probability does not meet the design criteria, analyze the importance and return to step S80 (S84). If the system failure probability meets the design criteria, adopt it as system plan data B. (S85).
- the function stop, operation, or operation unfavorable of the target system is performed.
- the elephant is the top event, the event for which the factor cannot be determined any more is the basic event, and the fault tree structure is hierarchically expanded from the top event to the basic event as the relationship between the event and the factor and connected by logical symbols.
- Input or edit and both are executed and created (S80).
- step S80 the fault tree data obtained in step S80 is converted into a logical expression based on Boolean algebra (S81), and the failure probability of the basic event is substituted for the Boolean algebra to calculate the failure probability of the top event (S82). ). Then, it is determined whether the system failure probability satisfies the design reference value (S83). In this determination, if the system failure probability does not satisfy the design standard value, analyze how much each individual basic event affects the obtained top event failure probability, and vary the basic event failure probability. Then, the contribution of the failure probability of the top event is calculated and the improvement plan is examined (S84). Then, returning to step S80, a fault tree structure of the improvement plan is created. In other words, a series of operations from step S80 to step S83 are repeated until the system failure probability satisfies the design standard value.
- system plan data (S85) is adopted as system plan data (S85), and system plan data B is stored in the system plan data storage unit 25. I do. After that, the process proceeds to the processing of the cost evaluation unit 23.
- FIG. 17 shows an example of the fault toll created in the fault tree creation process (S80) of the reliability evaluation unit 22 when the top event is a system failure with respect to the system plan shown in FIG. Show.
- the OR event is an event in which if any one of its lower events loses its function, its upper event also loses its function.
- the probability of loss of function q is calculated by Boolean algebra using Equation 1.
- Equation 1 qj is the probability of loss of function of lower event j, and N is the total number of lower events.
- An AND event is an event in which when all of its lower-level events lose their functions, their upper-level events also lose their functions.
- the probability of loss of function q is calculated by Boolean algebra and Equation 2 Issued
- the fault tree conversion process (S81), the fault tree is converted into a logical expression based on Boolean algebra using the fault tree shown in FIG. 17 and Expressions 1 and 2.
- the system failure probability calculation processing (S82), the failure probability of the top event is calculated by substituting the failure probability of the basic event.
- the reliability evaluation unit 22 calculates the failure probability of the system using these as input data.
- FIG. 17 is an explanatory diagram showing an example of a fault tree created by the reliability evaluation unit 22 and a calculation result of the failure probability of the system in this case.
- the failure probability per year of the system exceeds 1. 25 X 10- 3. Therefore, the design standard value of the system failure probability. Therefore, by analyzing the degree of influence of each basic event on the failure probability of the top event in the importance analysis process (S84) of the reliability evaluation unit 22, it is found that the AP server has the highest contribution. So, consider an improvement plan for the AP server.
- the system plan data adopted by the processing performance evaluation unit 21 and stored in the system plan data storage unit 25 is used.
- the AP server is regarded as a group of several servers, and the processing performance per server group is maintained at 4000 Z while the processing performance per server is 2000 Z Prepare two AP servers and use them as one AP server group.
- failure probability 3. 48 X 10- 2 per year one server does not change, the result of calculation of the failure probability of the system in system failure probability calculation unit 42 of the improvement idea is as shown in FIG 18.
- the failure probability per year of the system is 4. 49 X 10_ 5, and the failure of the system It is less than 1.0 X 1CT 4 per year, which is the design standard value of probability. In this case, it is adopted as the system plan data B and stored in the system plan data storage unit 25.
- FIG. 19 is a flowchart showing the processing content of cost evaluation section 23 in the embodiment of the present invention.
- the cost evaluation unit 23 determines whether to evaluate the equipment cost (S90), the equipment evaluation processing for evaluating the equipment cost (S91), and whether to evaluate the operating loss.
- Operating loss evaluation selection process (S92) to select whether or not, operating loss evaluation process (S93) to evaluate the operating loss, and equipment loss evaluation to select whether to evaluate the equipment loss It has a selection process (S94), a facility damage amount evaluation process (S95) for selecting whether to evaluate the facility loss amount, and a total cost evaluation process (S96) for evaluating the total cost.
- Equation 3 For a system plan that satisfies the design standard values, for example, Equation 3 can be calculated using the system failure probability, the cost of Thus, the expected value of the operating loss is obtained.
- the process proceeds to the equipment damage amount evaluation processing (S95).
- the reliability-related information 12 is configured for a system plan that meets the processing performance and failure probability design standard values created by the processing performance evaluation unit 21 and the reliability evaluation unit 22. Using the failure rate of the equipment (or subsystem) and failure mode and the mission time of the equipment (or subsystem) and failure mode, the failure probability of the equipment (or subsystem) and failure mode is calculated, and the cost is calculated.
- the equipment cost is evaluated for a system plan that satisfies the design standard values of the processing performance and the failure probability created by the processing performance evaluation unit 21 and the reliability evaluation unit 22. If you select that, add the equipment cost calculated in the equipment cost evaluation process (S90) to the cost, and if you select to evaluate the operating loss amount, calculate it in the operating loss amount evaluation process (S91). If you choose to evaluate the equipment damage amount by adding the expected operating loss amount to the cost, add the expected equipment loss amount calculated in the equipment damage amount evaluation process (S92) to the cost, and calculate the total cost of the selected item Is calculated.
- the reliability design is performed after the system processing performance design, and the cost evaluation is performed thereafter.
- the system plan data can be used by referring to each other.
- system plan data for each server in the system plan, if (1) one server is set so as to satisfy the specified processing performance or more, (2) a server group consisting of two or more servers Considering this, when the processing performance of the servers included in the server group is summed and the processing performance is set to satisfy the predetermined or higher processing, (3) the server is regarded as a multi-CPU server with two or more CPUs, and Three cases where the total processing performance of the CPUs included in the server is set so as to satisfy the predetermined or higher processing performance can be selected when designing reliability.
- the server performance of each server group is referred to by referring to the data on the number of servers depending on the processing performance per server group.
- Determine a more realistic value for the number of servers required for processing performance and when changing the number of CPUs in a server in the proposed system, refer to data on the dependence of processing performance per server on the number of CPUs.
- To determine a more realistic value for the number of CPUs required for the processing performance of each server reducing the burden on the designer and satisfying both the system processing performance design specifications and the reliability design specifications. , And can be designed to keep costs within an acceptable range
- a design that reduces the burden on the designer, satisfies both the design specifications of the system processing performance and the design specifications of the system reliability, and has a cost within an allowable range is provided. it can.
- the system reliability is designed! ⁇ , and then the cost is evaluated.
- the system proposal data is referred to each other so that it can be used. It is possible to change the number of servers in the system plan or the number of CPUs in the server while maintaining the system processing performance of the system plan equal to or higher than the design reference value without having to return to the system processing performance design again in the design stage. Therefore, the system plan can be changed so as to satisfy the design specification value of the failure probability of the system while maintaining the design specification value of the system processing performance without complicated work.
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Application Number | Priority Date | Filing Date | Title |
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US11/587,493 US8001059B2 (en) | 2004-04-28 | 2005-04-28 | IT-system design supporting system and design supporting method |
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JP4548180B2 (ja) * | 2005-03-29 | 2010-09-22 | 富士通株式会社 | 見積支援プログラム、見積支援方法、及び見積支援装置 |
JP4716259B2 (ja) * | 2006-03-29 | 2011-07-06 | 日本電気株式会社 | サイジング支援システム、方法、及びプログラム |
DE102008051653A1 (de) * | 2008-02-12 | 2009-08-20 | Abb Technology Ag | Verfahren und System zur Ermittlung einer individuellen Fehlerrate für die Beurteilung eines individuellen komplexen technischen Betriebsmittels |
US20090254411A1 (en) * | 2008-04-04 | 2009-10-08 | Kamal Bhattacharya | System and method for automated decision support for service transition management |
DE102009020675A1 (de) | 2008-10-21 | 2010-04-22 | Siemens Aktiengesellschaft | Verfahren zur rechnergestützten Simulation von Betriebsparametern eines technischen Systems |
JP5527326B2 (ja) * | 2009-10-29 | 2014-06-18 | 日本電気株式会社 | システム配置決定システム、システム配置決定方法およびプログラム |
JP5544929B2 (ja) * | 2010-03-01 | 2014-07-09 | 日本電気株式会社 | 運用管理装置、運用管理方法、運用管理プログラム |
US20110313812A1 (en) * | 2010-06-18 | 2011-12-22 | HCL America Inc. | Accounting for data dependencies in process models, analysis, and management |
JP5910499B2 (ja) * | 2010-08-18 | 2016-04-27 | 日本電気株式会社 | 拡張性評価装置、拡張性評価方法および拡張性評価プログラム |
WO2013109274A1 (en) | 2012-01-19 | 2013-07-25 | Empire Technology Development, Llc | Iterative simulation of requirement metrics for assumption and schema-free configuration management |
JP5970256B2 (ja) * | 2012-06-26 | 2016-08-17 | 株式会社日立製作所 | 運用計画策定支援システム及び方法 |
JPWO2014061199A1 (ja) | 2012-10-17 | 2016-09-05 | 日本電気株式会社 | システム設計方法、システム設計装置及びシステム設計プログラム |
JP2015185065A (ja) * | 2014-03-26 | 2015-10-22 | 株式会社日立製作所 | 構成設計装置 |
US10241852B2 (en) * | 2015-03-10 | 2019-03-26 | Siemens Aktiengesellschaft | Automated qualification of a safety critical system |
US10061670B2 (en) * | 2015-12-28 | 2018-08-28 | Siemens Aktiengesellschaft | Method and apparatus for automatically generating a component fault tree of a safety-critical system |
JP6794116B2 (ja) * | 2016-02-10 | 2020-12-02 | 三菱航空機株式会社 | 組合せ事象の評価装置 |
JP6781594B2 (ja) * | 2016-09-01 | 2020-11-04 | 日立Geニュークリア・エナジー株式会社 | プラント監視装置及びプラント監視方法 |
US20180270102A1 (en) * | 2017-03-15 | 2018-09-20 | Futurewei Technologies, Inc. | Data center network fault detection and localization |
EP3671384A1 (en) * | 2018-12-18 | 2020-06-24 | Siemens Aktiengesellschaft | Computer-implemented method for generating a mixed-layer fault tree of a multi-component system combining different layers of abstraction |
JP7433085B2 (ja) | 2019-03-06 | 2024-02-19 | 三菱電機株式会社 | システム分析装置 |
JP7428006B2 (ja) | 2020-02-26 | 2024-02-06 | 日本電気株式会社 | システム構成導出装置、方法およびプログラム |
US11416326B2 (en) * | 2020-08-28 | 2022-08-16 | Sap Se | Systems and methods for failure diagnosis using fault tree |
US11243697B1 (en) * | 2021-01-27 | 2022-02-08 | International Business Machines Corporation | Designing a computerized storage system having a prescribed reliability |
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US8001059B2 (en) | 2011-08-16 |
JP2005316696A (ja) | 2005-11-10 |
CN100435157C (zh) | 2008-11-19 |
JP4592325B2 (ja) | 2010-12-01 |
CN1947121A (zh) | 2007-04-11 |
US20070225948A1 (en) | 2007-09-27 |
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