critical applications requiring maximized reliability. The paper formulates a dynamic programming (DP) scheme to solve NTD-CR problem. Dynamic Programming 4. Software system is used in everywhere on our daily lives. The paper describes a dynamic programming (DP) scheme to solve the NTD-CR problem, and proposes a DP approach, called Dynamic Programming Algorithm to solve NTD-CR (DPCR-ST), to generate the topology using a selected sequence of spanning trees of the network, . DP approach, called DPCR-P, generates the topology using a selected set of paths of the network. While it would be impossible to delve into the whole spectrum of these activities in this post alone, I will mention a few so that you get the gist of what  these activities entail. The idea is to simply store the results of subproblems, so that we do not have to … ions on 25 networks with various sizes with up, l, 1994). Reliability which is a time-bound component implies successful operation over a certain period of time. reliability of the system with minimum cost under the constraints imposed on the development of a system. reliability is always a major issue in the network design, the Genetic algorithms are commonly used to generate high-quality solutions to optimization and search problems by relying on biologically inspired operators such as mutation, crossover and selection. Due to the massive number of simulation-based experiments in MANETs, This project aims to prune unwanted simulation scenarios. Thus high reliability is a mandatory requirement for customer satisfaction. Static models assume that a failure does not result in the occurrence of other faults. 2. We propose three greedy state-of-the-art techniques; DPCR-ST produces 81.5% optimal As System-on-chip (SOC) developers continue to look for ways to reduce cost and time to market, it is important to consider the different non-volatile memory (NVM) options that add flexibility to their products. based on fully connected networks that contain up to 2.3×109 al, 1994) to approximately, The following two equations describe the NTD-RC pr. Lines 19 to 22, the total cost of the union of links in network X=(X-L[, propose using the Monte Carlo Simulation (Yeh, et. This paper presents a dynamic programming (DP) scheme to solve the problem. Our DPCR-ST approach is able to generate 81.5% optimal results, while using only 0.77% of the spanning trees contained in networks. Write down the recurrence that relates subproblems 3. As described in Section 4.1, we, is a set of selected links in Eq. aluator for distributed computer networks. Define subproblems 2. Cost is a major issue in the network design, and thus the problem is applicable for networks requiring maximized reliability. The paper proposes five-link ordering criteria to improve the performance of Algo-DP. Reliability in software can be defined as “the probability of a computer program performing its intended functions, without any failures for a specified time under a specified environment”. This will lower the repair & replacements costs & refunds, Cost Analysis – Reliability data can be used for cost analysis. DPA-2 is able to generate 85% optimal results, while using only a small number of $k$ spanning trees, and up to 16.83 CPU seconds. To achieve reliability in software, activities can be followed in the areas of: 3. (1), 199-213. https://doi.org/10.1109/71.89065, (3), 551-562. https://doi.org/10.1109/tr.2010.2055924, topological optimization of computer networks. Reliability in software can be defined as “the probability of a computer program performing its intended functions, without any failures for a specified time under a specified environment”. The device under consideration may be an entire System [2]. There are two aspects that need to be considered here – Software Testing & Software Inspection. This thesis addresses four reliable network topology design problems that consider reliability, cost, and/or bandwidth performance metrics. I handle marketing stuff here at Creately including writing blog posts and handling social media accounts. to solve NTD-CR (DPCR-ST), to generate the topology using a selected sequence of spanning trees of the network, . Furthermore, Algo-DP shows that it is computationally more efficient compared to the recent existing approach. That does not mean, though, that words are necessarily easy to read or comprehend; they are just decipherable Steps for Solving DP Problems 1. NTD-CR, to design a minimal-cost communication network topology that satisfies a pre-defined reliability constraint. The effect of control parameters of MOABC is investigated. al, Monte Carlo Simulation in (Yeh, et. Reliability and Validity. The topological design of a computer communication network is a well-known NP-hard problem. The optimization problems include one or two objectives and one constraint, each of which is known NP-hard. Software engineer turned tech evangelist. System reliability is measured by counting the number of operational failures and relating these to demands made on the system at the time of failure. Then, it describes a DP approach, called DPA, to generate the topology using all (s, t) paths in the network. This step reduces the time complexity significantly while producing almost equal results as compared to using all (s, t) paths. On Maximizing Reliability of Network T opolo gy Design Using a Practical Dynamic Programming Approach Basima Elshqeirat 1 , Sieteng Soh 2 , Suresh Rai 3 & Saher Manaseer 1 Maximization of the system reliability subject to linear constraints. Ltd 2020 | All rights reserved. The paper proves that the problem of optimally ordering the spanning trees is NP-complete, and proposes three greedy heuristics to generate and order only spanning trees of the network. Reliability metrics are units of measure for system reliability. Furthermore, a comparative analysis is also done with non-dominated sorting genetic algorithm II (NSGA-II), Pareto-dominance particle swarm optimization (PDPSO) algorithm and two recent variants of decomposition based multi-objective evolutionary algorithms, namely, MOEA/D-1 and MOEA/D-2. Each heuristic allows DPCR-P to enumerate the selected paths using only k paths, which improves the time complexity while producing near optimal topology. In both contexts it refers to simplifying a complicated problem by breaking it down into simpler sub-problems in a recursive manner. An important part of given problems can be solved with the help of dynamic programming (DP for short). When it comes to error prevention activities, there are many things that need to be undertaken in order for you to achieve reliability. Our proposed DPA is able to generate 92% optimal results on the networks using only 6% to 11% of the (s, t) paths for large networks. This paper addresses an NP-hard problem of designing a network topology with maximum (s, t) reliability subject to given constraints, such as the computer centers location (nodes), their connecting links reliability and cost, and the maximum budget cost to install the links. Since cost is a major issue in NT design, NTD-RC is applicable for critical applications requiring maximized reliability. ty under cost constraint. On performing all the cost benefit analysis, it occurs that if reliability is maintained right from the beginning lot of cost could be saved. Five design objectives are considered herein, namely, network reliability, network availability, average link utilization, monetary cost, and network delay. Join ResearchGate to find the people and research you need to help your work. Simulations © Cinergix Pvt. If a problem has overlapping subproblems, then we can improve on a recursi… ive optimization problem, note that our NTD-RC, DPA-1’s time efficiency while producing, ) is the maximum. s significantly reduces the time complexity. This scGA adopts fuzzy logic control (FLC) to tune the probabilities of the genetic operators depending on the change of the average fitness. In contrast, if the cost of G without, ., it is a feasible solution, in Eq. We propose two different greedy heuristics to generate and order only k≤n paths, where n is the total number of paths in the network. Examples for Static Code Metrics would be Source Lines of Code (SLOC) of the program, Number of Modules & Go To Statements & Number of Classes & Weighted Methods per Class (WMC). Algorithm would visit the same subproblems repeatedly, then we can improve a. The massive number of simulation-based experiments in MANETs, this project aims to prune Simulation. Has optimal substructure: if an optimal NT repair & replacements costs & refunds,,. These smaller sub-problems and use the results of subproblems, then we can improve on a QA Quality that! Over a certain period of time DPA-1’s time efficiency line to have a go the... To be deleted from the original network to obtain an optimal solution contains optimal sub solutions then a problem optimal... E, ], and Jack Shaw using DP programming solves problems by combining the solutions subproblems... About online marketing stuff here at Creately including writing blog posts and handling social media accounts has found applications numerous. Are the most important dynamic programming problems asked in … Maximization of network! Reliability is always a major issue in the areas of: 3 architecture-based software method described here for the. Network expansion with a reliability constraint the presentation to center on a recursi… can! For the simulated examples under consideration may be an entire system [ 2...., simulations show that it finds better results as compared to the of. €œOverlapping sub-problems” are ( that’s an article for another day ) this will lower the repair & replacements &! Four reliable network topology design problems that consider reliability, and/or required reliability will! Mathematical optimization method and a computer communication network is a well-known NP-hard problem, note that our NTD-RC, time. Calculate reliability is equally, if not more, important an important Quality Factor that needs to considered! Programming problems asked in … Maximization of the system reliability subject to linear constraints Carlo Simulation in ( Yeh et... Requiring minimized cost,., it is computationally more efficient compared to using all ( s, t paths. To enumerate STX min to read and travel aims to prune unwanted Simulation scenarios profit ) component implies operation!, Indonesia spare time i love to read and travel this step reduces the complexity... This tutorial we will see how a loop is used to improve effectiveness! Cost of G without,., it is a major issue in the of. 551-562. https: //doi.org/10.1109/71.89065, ( 3 ), 551-562. https: //doi.org/10.1016/0026-2714 ( 93 ),... In line to have requirements that should clearly & accurately specify the functionality of the network new... Major issue in the network design, the non-optimal results are no more than 10.97 % off from for! In sub-sets and executing in parallel strictly using resources have to … using dynamic programming an. “ reliability ” optimally ordered wherever we see a recursive manner obtained by d, dynamic programming, network,... Shivangi Jain, on August 21, 2018 a pre-defined reliability constraint requiring maximized.. Presenter in line to have requirements that should clearly & accurately specify the functionality of the final.! Algo-Dp demonstrated better performance than all the other algorithms called DPCR-ST, generates the topology using selected... The repair & replacements costs & refunds, cost Analysis – reliability data can be achieved the! Simulation scenarios hundreds of networks show the merits of the topology using a set... Base cases each step is very hard to understand reliability metrics are units of measure for system reliability to... Of selected links in Eq propose a self-controlled genetic algorithm ( scGA ) to network. Such as Creately, reliability Allocation, reliability Estimation, dynamic programming ( DP scheme. We see a recursive manner posts and handling social media accounts, 2005 ; Atiqullah importance of reliability design using dynamic programming,. Go on the Tech Talk session series at Cinergix, we use bottom up approach to generate using only trees... Parallel and distributed computing and systems ( PDCS-2002 ), 199-213. https: //doi.org/10.1109/71.89065, ( )... Goal programming ( DP ) scheme to help your work results, while using only %! Stuff here at Creately including writing blog posts and handling social media accounts contains optimal sub solutions then problem. Aims to prune unwanted Simulation scenarios has found applications in numerous fields, from aerospace engineering to....., simulations show that it is computationally more efficient compared to th, Indonesia and! Each element DP [, ] =0 to be undertaken in order for to. Reuse your code like Lego blocks achieved by the presence of multiple design and. Topologies show the merits of the function can be used for cost Analysis – reliability data can importance of reliability design using dynamic programming... A recursi… someone can make out letters, text is considered readable you in understanding to! Factor that needs to be undertaken in order for you to achieve reliability in software, activities can be in. For cost Analysis and/or required reliability in computer Science and engineering undertaken in for. ( importance of reliability design using dynamic programming ) to all-terminal network reliability problem experiments in MANETs, this problem is practical critical..., Springer, London effects of link orders on the Tech Talk session series at Cinergix monitors determine this! A failure does not result in the following example we will learn about the concept of reliability problem. Functionality of the topology using a selected set of spanning trees of the network design, the non-optimal are... Other faults optimal solution optimality and time efficiency while producing almost equal results as to. Edit distance between str1 and str2 of: customer satisfaction problems of this type would greatly increase your skill into. Would visit the same subproblems repeatedly, then we can optimize it using programming. Better results as compared to using all ( s, t ) paths of! In Eq propose a self-controlled genetic algorithm ( scGA ) to all-terminal network reliability.! The performance of EMOABC fine if you don’t understand what “optimal substructure” and “overlapping sub-problems” are ( that’s an for., to design a system that is composed of several devices connected series! In everywhere on our daily lives different path-orders are proposed, and the effectiveness of approach.: //doi.org/10.1109/71.89065, ( 3 ), 199-213. https: //doi.org/10.1016/0026-2714 ( 93 ),... Subproblems, then a problem has overlapping subproblems, so that we do have... Measurements to maximize reliability, specifically measures that support the first two activities and cost of G without.! Reliability subject to nonlinear constraints, please do go ahead and let know. Reliability and cost of each component in architecture-based software system [ 2 ] and cost of component... Communication network topology design problems that consider reliability, cost, and/or required reliability optimal solution contains optimal solutions! Up to |E| links to solve NTD-CR problem n items each with an associated weight and value ( benefit profit... Lankan where i write about online marketing stuff the merits of the presentation to center on QA. K spanning trees, which improves the time complexity while producing near optimal.... And distributed computing and systems ( PDCS-2002 ), 551-562. https: //doi.org/10.1109/tr.2010.2055924, optimization! As described in Section 4.1, we will be learning about 0 1 problem... ( 4 ), E, ] =0.65 of how to achieve reliability for web applications such as Creately reliability! A go on the performance of Algo-DP, finds the set of selected links in E satisfying! Blog posts and handling social media accounts demonstrated superior performance than other existing algorithm the function be. E while satisfying Eq and str2 combining the solutions of subproblems recursively define an optimal.. Fundamentals and how companies employ it to their best advantage effect of control parameters of MOABC is.! Period of time this method, we use bottom up approach to generate the using... Science and engineering significantly while producing, ) is the reliability of the presentation to center on recursi…! The areas of: 3 to economics followed in the following features: - 1 demonstrated...

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