Performance Analysis Case Study Research Articles

PREDICTING PERFORMANCE IN A PaaS ENVIRONMENT: A CASE STUDY FOR A WEB APPLICATION

This paper demonstrates how the combination of simulation and real-world experiments can be used to aid decisions concerning the performance of a distributed application. It presents a case study of performance analysis carried out for a commercial application implementing a web-based API server for mobile clients. The application was deployed on the Heroku cloud-based Platform as a Service (PaaS). The analysis described in this paper provided information required to choose the proper configuration of resources for the software. Simulation was used in the research to identify factors crucial to the performance of the application. This allowed for the preparation of basic experiments concentrating on these factors. Consequently, the basic parameters of resources crucial for the efficiency of the application could be benchmarked at insignificant cost and effort. This approach allows us to reliably aid decisions concerning resource configuration for an analyzed application. The simulation method used in this research is based on the formalism of Timed Colored Petri Nets, but the complexity of formal modeling is hidden from its users. Application developers are able to conveniently create a high-level model of their designs and perform simulations, while the reliability of the results is ensured by the formalism. The paper demonstrates the usefulness of the simulation method for analyzing real-world distributed systems.

Wireless Modular System for Vessel Engines Monitoring, Condition Based Maintenance and Vessel’s Performance Analysis

Circumstances in shipping have rapidly changed within the past few years. The large increase of fuel cost, the decrease in the price of fares, the rapid progress in telecommunications, the crew reduction per vessel, the new environmental restrictions and the reinforcement of Green Shipping significance are facts that make remote monitoring and the evaluation of the vessel engines’ performance an imperative need. The challenges occurring from changing the typical vessel engine monitoring and maintenance model are many, such as: equipment installation on moving vessels, lack of long-term vessel availability, experienced and trained crew being on land, many different types or ages of vessel and vessel manufacturers.An extremely advantageous solution with proven positive results for this specific matter is the use of monitoring systems consisting of wireless smart sensors. These systems provide flexibility, adaptability, scalability and easy installation. The only system of this kind available in the global market, adjusted for Shipping and specifically for monitoring vessel engines, is the LAROS platform by NOMIA S.A. (member of Prisma Electronics SA).In this paper we will present the current status of maintenance in maritime vessels and the abovementioned new innovative remote monitoring of a vessel’s operational status electronic platform, which can greatly reduce the operational costs, enhance the operational vessel status and ensure the high quality of service a maritime company provides, as well as improve its environmental policy.Moreover, a case study of performance analysis regarding a vessel with the LAROS platform on board will be presented, showing the possibilities and the dynamics of vessel performance monitoring.

Supply chain planning for a multinational enterprise: a performance analysis case study

Motivated by a real world supply chain planning problem, this paper examines the impacts of exchange rate volatility and different shipping pricing structures on the overall performance for a multinational enterprise (MNEs). A unified optimisation model is developed that minimises the major costs incurred in an MNE, incorporating important factors such as manufacturing localisation, exchange rates, and quantity-based shipping pricing structures offered by transport vendors. Numerical results from the model implementation show that (a) shipping pricing structures can have pronounced impacts on manufacturing/assembly and distribution decisions both in the parent and host countries, (b) different shipping pricing structures might not be equally profitable as the cost benefits may only offset the losses from a discriminatory tariff or substantial storage expenses, and (c) increased manufacturing in the host country can be decelerated to a large extent by the localisation policy in the parent country and tight transport and storage limitations.

Integrated aggregate supply chain planning using memetic algorithm – A performance analysis case study

This paper aims to examine how a complex supply chain yields cost reduction benefits through the global integration of production and distribution decisions. The research is motivated by a complex real world supply chain planning problem facing a large automotive company. A mixed-integer nonlinear production-distribution planning model is solved using a customised memetic algorithm. The performance and effectiveness of the developed model and solution approach in achieving the global optimisation is investigated through experiments comparing the numerical results from the proposed integrated approach with those of a typical non-integrated (hierarchical) production–distribution optimisation.

Performance analysis case study of United States to India software development migration process

This performance analysis case study examines the migration of Custom Software Solutions, Inc. software development and maintenance, according to Gilbert's (1996) human performance theory, from teams in the United States to teams in India. Findings reveal the need for changes in project management guidelines, cross-team communication, resources, and organizational clarity. Suggested interventions include improving project management and organizational communication practices and establishing new protocols such as Web-based project forums and interactive learning modules.

Layer 1 Virtual Private Networks in Multidomain Next-Generation Networks

High-capacity e-science and consumer applications require transport networks that are dynamically provisioned. Rapid advances in next-generation SONET/SPH and optical switching along with GMPLS control have enabled many new services' provisioning capabilities. In particular, a key paradigm is the new layer 1 virtual private network framework, which allows clients to directly provision their own services without deploying expensive infrastructures. This article presents an overview of L1-VPN and describes a resource management scheme that will enable transport network virtualization across a multidomain network infrastructure. The scheme is implemented in both centralized and distributed control frameworks, and allows for dynamic sharing of transport resources. A case study of performance analysis results is presented showing a distributed control plane in a multidomain network architecture achieving higher VPN carrying capacity than a centralized control plane

04/02838 Regulatory performance analysis case study: Britain's electricity industry: de Oliveira, R. G. and Tolmasquim, M. T. Energy Policy, 2004, 32,(11), 1261–1276

04/02838 Regulatory performance analysis case study: Britain's electricity industry: de Oliveira, R. G. and Tolmasquim, M. T. Energy Policy, 2004, 32,(11), 1261–1276

Regulatory performance analysis case study: Britain's electricity industry

The success or failure of the privatisation and liberalisation of electricity supply industries has more often been judged in terms of process than of outcomes. In this paper, in contrast, this performance is assessed in terms of the performance of its associated system of regulatory governance. Taking the UK's electricity supply industry between 1989 and 2000 as case study, initially, a vertical cross-section of the regulation system gives a finding matrix for the various stakeholders involved and identifying winners and losers from the standpoint of funding flows. Next, a horizontal cross-section provides the environmental, distributive, allocative, dynamic and productive efficiencies grid for this system. The survey shows that the performance of the British ESI regulation system produced benefits, although not for all stakeholders and not as fairly as possible. The chosen path did not seem sustainable and failed to respect intergenerational transfers as a way of fostering sustainability and equity. It was unable to underpin simultaneous improvements in efficiencies over time, while redistributing industry's funding flows among the players in a regressive manner.

Performance analysis case study (abstract)

A common requirement of computer vendor's competitive performance analysis departments is to measure and report on the performance characteristics of another vendor's system. In many cases the amount of prior knowledge concerning the competitor's systcm is limited to sales brochures and non-technical publications. Availability of the system for benchmarking is minimal; there is little choice concerning memory and I/O configurations; and time to complete the project is short. A project of this nature is not, however, unique to computer vendors. Many users of computer systems that want to better understand a system's performance characteristics before deciding on a purchase, are also faced with similar restrictions.