Aircraft despatch reliability was the main subject of this research in the wider content of aircraft reliability. The factors effecting dispatch reliability, aircraft delay, causes of aircraft delays, and aircraft delay costs and magnitudes were examined. Delay cost elements and aircraft delay scenarios were also studied. It concluded that aircraft dispatch reliability is affected by technical and non-technical factors, and that the former are under the designer's control. It showed that the costs of aircraft delays are very significant and must be reduced. Cont/d.

As software systems grow in size they will also grow in complexity. If the increased complexity is not managed the system will be increasingly difficult to maintain. The effect of unmaintainable software is even more distinct when using a agile development process. By increasing the maintainability of the system these problems will be dealt with and the system can be extended with sustained efficiency. This thesis will evaluate the development process of a modern, agile company in order to find changes that will promote increased maintainability. The result is an modified process that will increase the maintainability with the smallest possible overhead for the development organisation. The result is based on earlier studies of development technologies that have proven to increase the maintainability. The implementation of these technologies are adjusted to fit the development team, and some of the technologies that are not suitable for the team are rejected.

More and more organizations and enterprises adopt the Strategy Map and Balanced Scorecard(BSC). However, did they really reach their strategy goal or do they have a mature method to assess their performances? When they finish contructing their strategy map and lauching the balanced scorecard, they may face the same problems, such as how to sucessfully implement strategy? How to effectively set up KPI? How to apply the limited resources into the most important strategy? Some researches mention that there is no interactive relationship among BSC, Strategy goal, Performance Indicators, and the actions they took. That is the limit of the current BSC theory. However, it do exists the complicated dynamics relation between the BSC strategy actions and the internal process of organization. Most of the top management only pay attention to the short-term performance and neglect the side effect and unintended consequences caused by the improper actions they took. They even misjudge the feedback information from the wrong messages because of the system delay. Therefore, the whole strategy planning turn out to be imperfect and the effectiveness of promoting strategy goal is not so good as they expected. But if they incorporate the system dynamics method into BSC, then it may resolve the dynamic and complex issue that happen in their system. The purpose of this study is toresearch and find out the interactive mechanism and method between strategy goal and performance measurement for the enterprises. According to the causal relationship found in the process of establishing the strategy map and examining its various measuring items, construct the system dynamics model and analyze the simulation outcomes. And then find out the driving factors to succeed and the Key Indicators for achieving the strategic goal. In this way, two objectives could be accomplished: (1) Launch and develop the strategy map and Balanced Scorecard, and then utilize the system dynamics to conduct the planning, simulation and test. (2) Through this interactive simulation and test between performance indicators and strategy goal, look for the best key performance indicators and revise the policy actions and strategy. System dynamics is the main approach adopted in this study. By following its modeling procedure, I undertook the data collecting and analyzing for the target company as my case study. And then, conducted the construction, simulation, test, and analysis of system dynamic model. According to the results, I made the conclusions of this study as follows: (1) Within the causal relationship between the strategy goal and performance measurement items of the BSC, there do exists an influence of side effect and unintended consequences. (2) The simulation outcomes of this system dynamics model could be taken as reference for planning and adjusting the strategy goal of BSC, and also could be the basis of finding out the leading index of the system. (3) Conclude and set up the basic system dynamics model for Balanced Scorecard. Trough this study, we hope that enterprises could adopt the system dynamic to help them improve their long- term integral effectiveness. At last, this study brings up the suggestions and proposes some idea for follow-up research.

This study investigates the connection between design patterns, object oriented (OO) quality metrics and software maintainability. The literature on OO metrics, design patterns and software maintainability are reviewed, the relation between OO metrics and software maintainability is investigated, and then, in terms of obtained maintainability indicator metrics, the maintainability change of an application due to usage of design patterns is observed.

Aircraft despatch reliability was the main subject of this research in the wider content of aircraft reliability. The factors effecting dispatch reliability, aircraft delay, causes of aircraft delays, and aircraft delay costs and magnitudes were examined. Delay cost elements and aircraft delay scenarios were also studied. It concluded that aircraft dispatch reliability is affected by technical and non-technical factors, and that the former are under the designer's control. It showed that the costs of aircraft delays are very significant and must be reduced. Cont/d.

Exploration and Production (E&P) project costs within the oil industry are continuously increasing reflecting a reality of more harsh environments, remote locations with minimal existing infrastructure and cost increases for materials and skilled resources. The significant capital expenditures translate to a number of projects either for new or revamped production facilities. Successful project completion requires a series of correct decisions throughout the project life-cycle namely design, construction, operations, maintenance and decommissioning. Using a Reliability, Availability and Maintainability (RAM) model as part of the project decision process is an E&P industry best practice that recently gained acceptance in Hess Corporation. This paper presents the RAM methodology and the gains from its application in a capital project. / text

Thesis (M.S.)--Air Force Institute of Technology, 2006. / "AFIT/GLM/ENS/06-08." "March 2006." Includes bibliographical references (leaves 217-219). Also available online via the Defense Technical Information Center website (http://stinet.dtic.mil/).

A falta de integração entre áreas de conhecimento pode gerar efeitos negativos no processo de projeto em uma construtora-incorporadora. Em muitos casos, o projeto do produto é elaborado pela incorporadora sem qualquer participação da área responsável pela produção e de outras áreas da construtora. O trabalho apresenta uma análise sobre a gestão de projetos na construção de edifícios, valorizando a participação da engenharia de produção nessa fase, apoiando-se nos conceitos de Projeto Simultâneo, e propõe diretrizes para sua aplicação na construtora-incorporadora Cyrela, com enfoque na construtibilidade e manutenibilidade. Para desenvolver a pesquisa foi realizada uma revisão bibliográfica sobre as características da gestão de projetos, da Engenharia de Produção na construção de edifícios, e sobre a Engenharia Simultânea no desenvolvimento de produtos com comparativo de modelos de indústrias seriadas para a construção civil, incluindo a interação entre os agentes do processo. Como resultados são apresentados: uma análise da interação entre os agentes do processo; a ligação entre pessoas, processos e tecnologia; os conceitos de construtibilidade, manutenibilidade e retroalimentação na interface com projetos. São igualmente feitas análises das tendências de modernização na gestão dos projetos por meio da modelagem da informação da construção e, apoiado em estudo de caso, são apresentadas as experiências do Projeto Simultâneo aplicadas na Cyrela. Por fim, são apresentadas as diretrizes para participação da Engenharia de Produção da Construtora e Incorporadora Cyrela no Projeto Simultâneo, sendo essa a principal contribuição do trabalho. Embora suas contribuições possam servir de referência para demais empresas do setor, essa pesquisa foi desenvolvida para aplicações práticas da Cyrela, construtora-incorporadora que atua na construção de edifícios em todas as regiões do Brasil. / The lack of integration between knowledge areas can generate negative effects in the design process in a construction-real estate developer. In many cases, the product design is prepared by the real estate developer without any involvement of the area responsible for production and other areas of construction. This thesis presents an analysis of the project management in building construction, valuing the participation of engineering production in this stage, basing on the concepts of Concurrent Design and proposes guidelines for its application at Cyrela constructionreal estate developer company, focusing on constructability and maintainability. To develop the research was performed a literature review about the characteristics of Project Management, Production Engineering in building construction, and the Concurrent Engineering in the development of products with comparative serial industries models for the construction industry, including interaction between agents of the process. As results are presented: an analysis of the interaction between the agents of the process; a link between people, processes and technology; the concepts of constructability, maintainability and feedback on interface with projects. Modernization trends in project management are analyzed also through building information modeling and, through case study, are presented the Concurrent Design experiences applied at Cyrela. Finally are presented the guidelines to the participation of the Production Engineering of Cyrela construction-real estate developer on Concurrent Design, being the main contribution of this thesis. Although the contributions may serve as a reference for other companies in the sector, this research was developed for practical applications at Cyrela, constructionreal estate developer that acts in the construction of buildings in all regions of Brazil.

Our work is a case study for Team Sweden, which is a national effort to produce a team of soccer playing robots. We took the present structure of the Reactive Planner, which is the game-planning module of the system, and made two new parallel versions of the Reactive Planner. One where we tried to optimize for CPU and memory usage called the performance-oriented implementation. We also made one implementation where we tried to optimize for maintainability called the maintainability-oriented implementation. To evaluate the implementations we ran a series of CPU and memory usage tests to assess the performance. We also estimated the maintainability of both implementations. The test results where later used to decide which implementation we should recommend to Team Sweden. The results showed that the difference in maintainability did outweigh the difference in performance. The conclusion is that the maintainability-oriented implementation is in this case the preferred / Vårt arbete består av en fallstudie för Team Sweden som är ett nationellt samarbete för att skapa ett lag med fotbollsspelande robotar. Vi använde oss av den nuvarande strukturen av Reactive Planner, vilket är en spelplanerings modul för systemet, och tillverkade två parallella versioner. En som vi försökte optimera prestanda i, kallad prestandaorienterad implementation. Samt en som vi försökte optimera underhållbarheten i, kallad underhållbarhetsorienterad implementation. För att evaluera implementationerna så gjorde vi en serie CPU och minnestester för att evaluera prestanda. Vi estimerade även underhållbarheten för de båda implementationerna. Testresultaten användes sen för att göra en bedömning om vilken av implementationerna som var mest fördelaktig för Team Sweden. Testresultaten visade att skillnaden i underhållbarhet övervägde skillnaden i prestanda. Slutsatsen är i det här fallet att den underhållbarhetsorienterade implementationen versionen är att föredra.

Single-page applications have historically been subject to strong market forces driving fast development and deployment in lieu of quality control and changeable code, which are important factors for maintainability. In this report we develop two functionally equivalent applications using AngularJS and React and compare their maintainability as defined by ISO/IEC 9126. AngularJS and React represent two distinct approaches to web development, with AngularJS being a general framework providing rich base functionality and React a small specialized library for efficient view rendering. The quality comparison was accomplished by calculating Maintainability Index for each application. Version control analysis was used to determine quality indicators during development and subsequent maintenance where new functionality was added in two steps. The results show no major differences in maintainability in the initial applications. As more functionality is added the Maintainability Index decreases faster in the AngularJS application, indicating a steeper increase in complexity compared to the React application. Source code analysis reveals that changes in data flow requires significantly larger modifications of the AngularJS application due to its inherent architecture for data flow. We conclude that frameworks are useful when they facilitate development of known requirements but less so when applications and systems grow in size. Sammanfattning: Ensidesapplikationer har historiskt sett påverkats av starka marknadskrafter som pådriver snabba utvecklingscykler och leveranser. Detta medför att kvalitetskontroll och förändringsbar kod, som är viktiga faktorer för förvaltningsbarhet, blir lidande. I denna rapport utvecklar vi två funktionellt ekvi-valenta ensidesapplikationer med AngularJS och React samt jämför dessa applikationers förvaltningsbarhet enligt ISO/IEC 9126. AngularJS och React representerar två distinkta angreppsätt på webbutveckling, där AngularJS är ett ramverk med mycket färdig funktionalitet och React ett mindre bibliotek specialiserat på vyrendering. Kvalitetsjämförelsen utfördes genom att beräkna förvaltningsbarhetsindex för respektive applikation. Versionshanteringsanalys användes för att bestämma andra kvalitetsindikatorer efter den initiala utvecklingen samt två efterföljande underhållsarbeten. Resultaten visar inga markanta skillnader i förvaltningsbarhet för de initiala applikationerna. I takt med att mer funktionalitet lades till sjönk förvaltnings-barhetsindex snabbare för AngularJS-applikationen, vilket motsvarar en kraftigare ökning i komplexitet jämfört med React-applikationen. Versionshanteringsanalys visar att ändringar i dataflödet kräver större modifikationer för AngularJS-applikationen på grund av dess förbestämda arkitektur. Utifrån detta drar vi slutsatsen att ramverk är användbara när de understödjer utvecklingen mot kända krav men att deras nytta blir begränsad ju mer en applikation växer i storlek.