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Ata Allah Taleizadeh - One of the best experts on this subject based on the ideXlab platform.

  • a hybrid circular economy game theoretical approach in a dual channel green supply chain considering sale s Effort Delivery time and hybrid remanufacturing
    Journal of Cleaner Production, 2020
    Co-Authors: Nima Alizadehbasban, Ata Allah Taleizadeh
    Abstract:

    Abstract The circular economy (CE) and the marketing activities are the key subjects to attract the market share in today’s complex supply chain. Here, dual selling channels, the online Delivery time, and the distributor sales Effort are considered as marketing activities to attract the customers. Moreover, in order to meets the economic and environmental principles of the CE, three responsibilities to ease the carbon emission, as approaches for the return on investment, are devised, including investment in the green production, the cap and trade regulation, and the hybrid remanufacturing via both the manufacturer and the distributor under the technology license. This such complex supply chain needs to determine the equilibrium amounts of the distinguishing elements, including the pricing strategy, remanufacturing approaches, Delivery time, and sales Effort to abate the conflicts between the members, and consequently, to enhance the economic and CE objectives of the supply chain (SC). In order to obtain the equilibrium decision makings, three game theoretical approaches, including the manufacturer-Stackelberg game (SM), the distributor-Stackelberg game (SR) and the Nash game (N) are employed. The interaction between the game sequences and the remanufacturing process is the key purpose of this paper to not only maximize the profit of SC but also to enrich the CE and marketing goals of this research. The outcomes presented that the SM game, where the manufacturer remanufactures most of the defected products which are collected via the distributor, is the best game strategy to improve the profits of both the distributor and the manufacturer, and also to enhance the other distinguishing elements. In addition, in the SR game, when most of the returns remanufacture via the distributor under the manufacturer license, it not only maximizes the profits of members but also lead to the improvement of the distinguishing elements. In the Nash game, however, there is a conflict between the members about the remanufacturing process, which reduces the SC profit in this game as compared to other ones.

  • A hybrid circular economy - Game theoretical approach in a dual-channel green supply chain considering sale’s Effort, Delivery time, and hybrid remanufacturing
    Journal of Cleaner Production, 2020
    Co-Authors: Nima Alizadeh-basban, Ata Allah Taleizadeh
    Abstract:

    Abstract The circular economy (CE) and the marketing activities are the key subjects to attract the market share in today’s complex supply chain. Here, dual selling channels, the online Delivery time, and the distributor sales Effort are considered as marketing activities to attract the customers. Moreover, in order to meets the economic and environmental principles of the CE, three responsibilities to ease the carbon emission, as approaches for the return on investment, are devised, including investment in the green production, the cap and trade regulation, and the hybrid remanufacturing via both the manufacturer and the distributor under the technology license. This such complex supply chain needs to determine the equilibrium amounts of the distinguishing elements, including the pricing strategy, remanufacturing approaches, Delivery time, and sales Effort to abate the conflicts between the members, and consequently, to enhance the economic and CE objectives of the supply chain (SC). In order to obtain the equilibrium decision makings, three game theoretical approaches, including the manufacturer-Stackelberg game (SM), the distributor-Stackelberg game (SR) and the Nash game (N) are employed. The interaction between the game sequences and the remanufacturing process is the key purpose of this paper to not only maximize the profit of SC but also to enrich the CE and marketing goals of this research. The outcomes presented that the SM game, where the manufacturer remanufactures most of the defected products which are collected via the distributor, is the best game strategy to improve the profits of both the distributor and the manufacturer, and also to enhance the other distinguishing elements. In addition, in the SR game, when most of the returns remanufacture via the distributor under the manufacturer license, it not only maximizes the profits of members but also lead to the improvement of the distinguishing elements. In the Nash game, however, there is a conflict between the members about the remanufacturing process, which reduces the SC profit in this game as compared to other ones.

Giuseppe Iazeolla - One of the best experts on this subject based on the ideXlab platform.

  • A dynamic simulator of software processes to test process assumptions
    Journal of Systems and Software, 2001
    Co-Authors: Paolo Donzelli, Giuseppe Iazeolla
    Abstract:

    Abstract Validation testing of software processes may provide both qualitative and quantitative suggestions to understand the ways to change the software process to improve its quality, or the ways to achieve specific organisation's needs. In many cases, however, such understanding has to be done without affecting the actual environment. To this purpose, this paper introduces the use of process simulators for validation testing. To be effective, however, simulators must combine the ability to sustain the complexity of the modelling problem with the so-called dynamic estimation capability, that is the capability of representing the dynamics of the simulated process. To achieve such objectives, the introduced simulator is based on the association of three conventional modelling methods (analytical, continuous and discrete-event) into a unique hybrid multi-level new model, called dynamic capability model (DCM). The paper applies DCM in the context of a waterfall-based software process to study the effects of three different quality assurance management policies on given process quality attributes, as Effort, Delivery time, productivity, rework percentage, and product quality. The verification of the simulator representativeness is also performed by reproducing empirically known facts in the process behaviour.

  • A hybrid software process simulation model
    Software Process: Improvement and Practice, 2001
    Co-Authors: Paolo Donzelli, Giuseppe Iazeolla
    Abstract:

    This paper deals with simulation modeling of software processes and proposes the combination of three traditional modeling methods (analytical, continuous and discrete-event) into a unique hybrid two-level modeling approach. At the higher abstraction level, the process is modeled by a discrete-event queuing network, which represents the component activities (i.e. service stations), their interactions, and the exchanged artifacts. The implementation details of the introduced activities are given at the lower abstraction level, where the analytical and continuous methods are used. The proposed approach is applied to a waterfall-based software process to study the effects of requirements instability on various process quality attributes, as Effort, Delivery time, productivity, rework percentage and product quality. Simulation results show that the use of the model can provide both qualitative and quantitative suggestions on how to change the software process to improve its quality or to achieve specific organizational goals. The model is primarily designed to represent the behavior of hypothetical projects, to allow researchers to view the implications of their assumptions. However, with small improvements, it can be extended to become a tool for analyzing and predicting the behavior of actual projects. Copyright © 2001 John Wiley & Sons, Ltd.

  • Hybrid simulation modelling of the software process
    Journal of Systems and Software, 2001
    Co-Authors: Paolo Donzelli, Giuseppe Iazeolla
    Abstract:

    Abstract The paper proposes the combination of three traditional modelling methods (analytical, continuous and discrete-event), into a unique hybrid two-level modelling approach, to address software process simulation modelling issues. At the higher abstraction level, the process is modelled by a discrete-event queueing network, which represents the component activities, their interactions, and the exchanged artefacts. At the lower abstraction level, the analytical and continuous methods are used to describe the behaviour of the introduced activities. The hybrid approach is applied to a waterfall-based software process to study the effects of requirements instability on various process quality attributes, such as Effort, Delivery time, productivity, rework percentage and product quality. Simulation results show that the use of the model can provide both qualitative and quantitative suggestions on how to improve the software process or on how to satisfy specific organisational needs. Although, the model has been primarily designed to represent the behaviour of hypothetical projects, and to allow researchers to view the implications of their assumptions, it can be easily customised and extended to become a tool for analysing and predicting the behaviour of actual projects.

Yanni Kang - One of the best experts on this subject based on the ideXlab platform.

  • Change-Oriented Open Source Software Process Simulation
    IEEE Access, 2018
    Co-Authors: Xuan Zhang, Xu Wang, Yanni Kang
    Abstract:

    The goal of our research is to find better ways for assessing the impact of changes to the software projects and the cost-effectiveness of process improvement strategies. To support decision-makers in analyzing changes effects and finding the optimal improvements of software process in a given project, a process simulation model using the system dynamics modeling technique is proposed and used in the context of a case study with open source software. Details of the system dynamics model, its usage scenarios and simulation experiments are provided. With the help of the simulation model, the process quality attributes of the open source software Spring Framework with varying change effects was evaluated. The project Effort, Delivery time, productivity, schedule, and product quality are impacted as a result of changes. Three different process improvement strategies were evaluated to help decision-makers choose most cost-effective improvement strategies. The simulation models can be used as an effective tool to evaluate the impact of changes, reason about the process improvement, and support consensus building by visualizing dynamic views of the process.

Francesco Palmieri - One of the best experts on this subject based on the ideXlab platform.

  • Loss-Tolerant Event Communications Within Industrial Internet of Things by Leveraging on Game Theoretic Intelligence
    IEEE Internet of Things Journal, 2018
    Co-Authors: Christian Esposito, Massimo Ficco, Aniello Castiglione, Francesco Palmieri, Huimin Lu
    Abstract:

    Internet of Things (IoT) is one of the key technologies paving the way for the next industrial revolution named as Industry 4.0, since it promises to realize smarter factories by optimizing costs and productivity. Traditionally, the adopted communication protocols among the sensors are required to manage the large scale of the infrastructure in terms on the high number of interconnected nodes and the massive volume of exchanged data. However, due to the key role of those Industrial IoT in exchanging business critical data, such protocols need to also provide high resiliency guarantees to the message exchange, with as few Delivery misses as possible. The publish/subscribe interaction pattern and the protocol implementing it are a technically sound approach for achieving scalability and elasticity, thanks to their intrinsic decoupling among the interacting nodes. However, they are often unsuitable in their current form, because they provide only best-Effort Delivery guarantees, or they adopt naive solutions to achieve resilient communication, especially when wireless networks are used. This paper presents a clustered lightweight gossiping algorithm for resilient event-based communications among the sensors, without requiring a predeployed brokering infrastructure supporting the adopted publish/subscribe protocol. A simulation-based assessment has been performed in order to empirically show the improvements in terms of successfully delivered notification without the excessive costs of the state-of-the-art solutions available in the literature.

  • Network-aware scheduling for real-time execution support in data-intensive optical Grids
    Future Generation Computer Systems, 2009
    Co-Authors: Francesco Palmieri
    Abstract:

    High performance communication support is a critical aspect for modern Grid environments where the deployment of data-intensive applications often requires moving Petabytes of data between geographically distant data repositories in specific time ranges. The best-Effort Delivery system of the Internet, often used as the underlying transport network, imposes severe constraints on the transfer of massive amounts of data, and thus restricts the deployment of the above applications on wide-area scales. Besides the lack of bandwidth, the inability to provide dedicated links makes the current network technology not well suited for performance critical Grid computing. A solution is needed to provide dedicated end-to-end connections, dynamically allocable on-demand or by scheduled reservation to critical data-intensive applications. Wavelength routing is at the state of the art the most promising solution to realize such connections. Accordingly, we propose an evolutionary Grid approach built on inter-domain end-to-end lightpath provisioning, controlled by a meta-scheduling logic on advance reservation basis, offering the required connectivity services to the involved Grid nodes by influencing job scheduling decisions with network-related information. We discuss opportunities and challenges in the network control plane and Grid middleware design, together with the required interfaces, adapters and algorithms critical to the provision of network-assisted extensible resource scheduling services. The proposed solution will result in a flexible Grid architecture that supports cooperation between different scheduling entities, based on a scalable framework for dynamic configuration and interconnection of multiple types of resources for high performance Grid applications over globally distributed optical network systems.

Arvind Prabhudev - One of the best experts on this subject based on the ideXlab platform.

  • Priority-based technique for the best-Effort Delivery of stored video
    Multimedia Computing and Networking 1999, 1998
    Co-Authors: Wu-chi Feng, Ming Liu, Brijesh Krishnaswami, Arvind Prabhudev
    Abstract:

    In this paper, we introduce a priority-based technique for the Delivery of compressed prerecorded video streams across best-Effort networks. This technique uses a multi-level priority q ueue in conjunction with a Delivery window to h elp smooth the video frame rate delivered to the end user while allowing it to easily adapt to changing network conditions. Compared with current approaches, our priority-based approach has several advantages. First, it acts more globally by ensuring that a minimum frame rate for the window interval has been delivered before sending enhancement l ayers. Second, this approach is much simpler to implement than other frame smoothing algorithms that have been presented for the Delivery of stored video across best-Effort networks. Finally, this approach is directly applicable for the shaping of MPEG-based video encodings with frame dependencies.