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Spontaneous combined rupture of a pelvicalyceal cyst into the collector system and retroperitoneal space during the acquisition of computed tomography scan images: a case report

Marques, Diogo ; Bezerra, Regis Otaviano ; Siqueira, Luiz de Brito; Menezes, Marcos ; Rocha, Manoel de Souza; Cerri, Giovanni Guido
Fonte: Journal of Medical Case Reports 2012, n.6,386,pp 1-4,2012; London Publicador: Journal of Medical Case Reports 2012, n.6,386,pp 1-4,2012; London
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
45.72%
Abstract Introduction Pelvicalyceal cysts are common findings in autopsies and can manifest with a variety of patterns. These cystic lesions are usually a benign entity with no clinical significance unless they enlarge enough to cause compression of the adjacent collecting system and consequently obstructive uropathy. Few cases of the spontaneous rupture of pelvicalyceal renal cysts have been published and to the best of our knowledge there is no report of a combined rupture to collector system and retroperitoneal space documented during a multiphase computed tomography. Case presentation We report a case of a ‘real-time’ spontaneous rupture of a pelvicalyceal cyst into the collecting system with fistulization into the retroperitoneum. The patient was a 78-year-old Caucasian man with a previous history of renal stones and a large pelvicalyceal renal cyst who was admitted to our Emergency department with acute right flank pain. A multiphase computed tomography was performed and the pre-contrast images demonstrated a right pelvicalyceal renal cyst measuring 12.0 × 6.1cm in the lower pole causing moderate dilation of the upper right renal collection system. In addition, a partially obstructive stone on the left distal ureter with mild left hydronephrosis was noted. The nephrographic phase did not add any new information. The excretory phase (10-minute delay) demonstrated a spontaneous rupture of the cyst into the pelvicalyceal system with posterior fistulization into the retroperitoneal space. Conclusion In this case study we present time-related changes of a rare pelvicalyceal cyst complication...

Where is that hemodialysis catheter (superior vena cava or aorta)? A case of intraarterial catheter placement

Tan, Valerie; Schwartz, John C.
Fonte: Baylor Health Care System Publicador: Baylor Health Care System
Tipo: Artigo de Revista Científica
Publicado em /04/2014 EN
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45.54%
We present a case of a previously unrecognized intraarterial placement of a central venous catheter (CVC)—in this case, a large-bore hemodialysis catheter in an 82-year-old woman. CVC insertions have become a common practice in hospitals due to a variety of indications, and tunneled CVCs still remain an important form of access in patients with end-stage renal disease. Intraarterial puncture is a common complication during CVC insertion, while intraarterial (mis)placement is fairly uncommon and if unrecognized can lead to significant morbidity and mortality.

Ergative Case and the Transitive Subject: A View from Nez Perce

Deal, Amy Rose
Fonte: Springer Verlag Publicador: Springer Verlag
Tipo: Artigo de Revista Científica
EN_US
Relevância na Pesquisa
45.59%
Ergative case, the special case of transitive subjects, raises questions not only for the theory of case but also for theories of subjecthood and transitivity. This paper analyzes the case system of Nez Perce, a ”three-way ergative” language, with an eye towards a formalization of the category of transitive subject. I show that it is object agreement that is determinative of transitivity, and hence of ergative case, in Nez Perce. I further show that the transitivity condition on ergative case must be coupled with a criterion of subjecthood that makes reference to participation in subject agreement, not just to origin in a high argument-structural position. These two results suggest a formalization of the transitive subject as that argument uniquely accessing both high and low agreement information, the former through its (agreement-derived) connection with T and the latter through its origin in the specifier of a head associated with object agreement (v). In view of these findings, I argue that ergative case morphology should be analyzed not as the expression of a syntactic primitive but as the morphological spell-out of subject agreement and object agreement on a nominal.; Linguistics

Case study on re-architecting of established enterprise software product : major challenges encountered and SDM prescriptions from lessons learned

Quah, Kok-Seng
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 122 p.; 7072247 bytes; 7079293 bytes; application/pdf; application/pdf
ENG
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45.5%
The paper studies a real word project of an enterprise software product re-architecting at a mid-sized telecommunication company. It begins with a description of the company and the software product, as well as an elaboration of the project under study. Using written surveys and follow-up interviews as the primary data gathering tools, the paper collects and tabulates first-hand experience and opinions from key project participants. Based on the survey results, the paper proposes an integrative implementation framework, based primarily on literature reviews in offshore outsourcing, systems and project management (SPM) and product design and development (PDD), for a detailed analysis of key challenges encountered by the project under study. The paper also investigates if specific key challenges could have been managed or influenced by the application of specific methods and tools within the proposed framework.; by Kok-Seng (Darrel) Quah.; Thesis (S.M.)--Massachusetts Institute of Technology, System Design and Management Program, 2005.; Includes bibliographical references (p. 117-122).

Managing novelty at the interfaces between concept and product : case studies for the automotive industry

Zarewych, Lara Daniv, 1972-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 93, 6 p.; 9584143 bytes; 9595833 bytes; application/pdf; application/pdf
ENG
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45.6%
Appearance of the product is a discerning factor for the consumers purchase decisions. Time from concept to product creation is a critical factor in the competitive automotive industry. The period to develop a product is dependant on the people, content and the technology changes that constitute a large majority of expense allocation, and time invested. The greater the degree of change from something established and successful, the more difficult it becomes to incorporate the change into a product. Being successive in the automotive industry relies on the ability to maintain market presence with new and innovative products, while shortening the cycle time associated with new product design, development, and its introduction. Increasing capability to manage changes becomes more challenging as product complexity and customer demands increase and product life cycles decrease. How automotive manufacturers manage these changes during the critical product definition phase through process, tools and methods is the central discussion of this paper. The intent of this thesis is to identify the processes and key enablers that allow a rapid development process for appearance related systems, in particular the interior environment of the vehicle. Five cases that effect the interior trim environment will be reviewed to understand the methods...

Inherent discipline required in large system change

Rivard, Robin L
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 100 p.; 7083498 bytes; 7088716 bytes; application/pdf; application/pdf
ENG
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45.66%
Recent electrical architectures of land vehicles have shown a marked increase in networking and integration of electronic controls into traditionally electro-mechanical devices, which results in complex functional interactions throughout the electrical system. This trend often drives a large system change that modifies the engineering roles of the component level engineer and also creates a need for an evolution to a vehicle level systems engineering approach. In this paper, a claim was put forth that without a certain level of inherent discipline in place and functional, no successful large system change can occur. Inherent discipline was decomposed into three parts: process, personal, and organizational disciplines. Each of these was described and relationships between them were investigated. The correlation between parenting and organizational discipline was explored. A case for the business value of inherent discipline was made by examining two examples; one of organizational progress and one of manufacturing progress. Then a case study of an emerging large system change, feature ownership, was presented. Details on the engineering roles required for feature based development at each of the hierarchical levels of the electrical system were presented.; (cont.) Using the Design Structure Matrix as a tool...

Dependency models as a basis for analyzing software product platform modularity : a case study in strategic software design rationalization; influence of architecture on software product platform longevity and extensibility

LaMantia, Matthew J. (Matthew John)
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 131 p.; 5111650 bytes; 5118305 bytes; application/pdf; application/pdf
ENG
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45.56%
It is broadly accepted among software managers and architects that maintaining the integrity of software designs is important for the long-term health and viability of software product platforms. The use of modular, information-hiding architectures is considered beneficial in this regard, because they enable the addition of new features and the correction of software defects without widespread changes (Parnas, 1972; Parnas, 1978). Moreover, modular architectures in general add value to system designs by creating options to improve the system by substituting or performing experiments on individual modules (Baldwin and Clark, 2000). Recent research has sought to clarify and to define formally these notions of modularity, and their value in the software domain, though the use of software dependency models and software design structure matrices. These models provide a graphic representation of the relationships between the building blocks of large software systems, which can be used to aid visual understanding of their structure, and which also form the basis for quantitative metrics for evaluating the degree of modularity of a software system (MacCormack et al., 2005; Sangal et al., 2005; Sullivan et al., 2006).; (cont.) The goal of this thesis is to contribute to the development and validation of formal models of modularity and value...

Product and program management : battling the strangler trees of system and social complexity in the software market jungle

Hempe, John A. (John Alan)
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 147 p.
ENG
Relevância na Pesquisa
45.53%
An exploration of Software Product and Program Management as recently emergent roles in the information technology sector is presented. The exploration is presented in six sections divided into two major parts. The first part, in four sections, explores Product Management from a primarily anthropological and managerial perspective, while the second part, in two sections, explores major engineering issues related to the role. The first part gives a synopsis of the history and economics of software products, demonstrating the rapid evolution of a field facing unprecedented problems with product complexity and motivating the need for Product Management. The role of Product Manager is explored in detail using both extant literature and interviews conducted with current practitioners in industry. The related role of Program Manager is briefly discussed. Finally, an extended historical case study is presented demonstrating the struggles and pitfalls of Product Management in software product companies. The second part explores two major engineering issues related to the Product Management role: Project Management and Requirements Engineering.; (cont.) A survey of major Software Project Management methods in use is given along with critiques of their effectiveness. Finally...

Achieving innovation and development speed in large structured organizations : an ecological view and case study

Hajdukiewicz, John R
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 62 leaves
ENG
Relevância na Pesquisa
45.65%
Innovation has been long known to be difficult to accomplish in large companies that have well structured processes. Structured processes (such as the use of Six Sigma) can provide significant benefits in terms of efficiency and productivity. However, it can also hinder innovation in that it zones in on local, incremental solutions too quickly. This thesis explores different strategies corporations may take in incorporating innovation at their organizations. First, background and theory are presented to guide the discussion, grounded on ecological psychology. Second, a case study (VisionPRO Thermostat) is presented that provides insight in how innovation can work in large structured organizations; in this case, outsourcing and the use of common tools were used as the innovation strategy and transfer mechanism. Third, the discussion is expanded to broader corporate strategies that can inject innovation in product development processes. Innovation and structured processes are at odds with each other and need to be managed with different approaches. Innovation processes require creative isolation from high structure to open degrees of freedom and the design space; this can be accomplished through multiple strategies such as outsourcing...

An analysis of structure and process of corporate alliance development using system architecture frameworks

Kim, Gwang Gyu
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 97 leaves
ENG
Relevância na Pesquisa
45.54%
A strategic alliance has been one of the core methods for expanding the business of many corporations in terms of geographic presence, business domain, and technological scope. The strategic alliance includes many different types of partnerships, including licensing in and out, joint product development, minority equity investments, joint ventures, and mergers and acquisitions. These alliances involve many distinctive participants inside and outside a corporation and for this reason, the alliance-forging process and management tend to be quite complicated for systematic analysis. Therefore in this thesis I employ system architecture frameworks to analyze strategic alliances in a systematic way from a holistic viewpoint. I apply an object process methodology (OPM) to understand interactions among different participants during the process of forging alliances, analyze the upstream and downstream influences, and finally adopt a holistic framework to illustrate detailed interactions during the process. The alliance process basically consists of four distinctive phases: formulation, partner selection, negotiation, and management. Comparing the results with the DuPont case, I realized that the alliance management phase should be augmented for more comprehensive management. Strategic alliances and mergers and acquisitions are discussed in the corporate-level context. They have many driving forces in common at the level of corporate context...

System strategies in the management of transit systems towards the end of their life cycle

Kairon, Ajmer Singh
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 109 leaves
ENG
Relevância na Pesquisa
45.55%
This thesis explores and evaluates essential strategies needed for the transit authority/operator to deal with end of life cycle challenges of Rapid Transit Systems (RTS) systems. RTS systems are elaborate systems consisting of various subsystems. It is believed that one of the greatest challenges of such systems is the integration of these various sub-systems to ensure that they work correctly; functionally and safely at the onset of development. While this is true there also exist real challenges towards the end of the life cycle which unfortunately is not dealt with during the design conceptualization and implementation. The fact that the RTS system is an elaborate amalgamation of other subsystems functioning together makes the management of its end of life cycle challenging. The life spans of these various subsystems are different i.e. the mismatch in life cycles of these systems could cause serious problems in the future. There are two approaches to manage these challenges i.e. look at it from a design standpoint and start incorporating fixes at the design stage to address end of life cycle challenges (start of the value chain) or look at the already present RTS systems around the world and see what can be done when most of the systems are mid life or nearing end of life and formulate strategies to address these challenges (end of the value chain). This thesis has focused on the latter approach given that systems at mid-life and near end of life are of priority now and further any lessons learnt from these exercises could be incorporated into new designs. Four different strategies were defined and assessed: Public Private Partnerships (PPP)...

A system dynamics model for the strategic analysis of options for sourcing engineering design

Ufongene, Charles Mmaduka
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 131 p.
ENG
Relevância na Pesquisa
45.53%
EC (Engineering Change) is the natural by-product of the Engineering Design process. There are two types of EC: Revisions and Defects Correction. Revisions arise because Engineering Design is an iterative process, requiring Engineers to implement necessary Revisions to the design of a product or systems to improve performance measures. Defects on the other hand are pure design errors, and arise from the fact that the Engineering Design work is not being accomplished with Perfect Quality. These Defects must therefore be corrected in what is termed Rework. EC is the critical factor in determining Lead Time and Labor cost of an Engineering Design work. The generation of Rework - requiring EC depends on several factors including : Quality, Design Complexity, Time to Discover Rework, Time for Issues Resolution, Hiring New and less experienced staff and Over Time work. This thesis presents a Systems Dynamics Model which incorporates these factors as exogenous variables to enable the simulation of their impacts on endogenous variables such as Lead Time and Labor costs. Since these factors exhibit wide variability when the Engineering Design is accomplished In-House compared to when it is Outsourced, the model is therefore a tool that can help an OEM in the Strategic Analysis of Options for the Sourcing of Engineering Design work. A simulation example is given in which an Engineering Design with 474 Initial Designs required 400 fully experienced Engineers to accomplish in 360 Days and a quality level of 52% (the Baseline case). The OEM had only 200 fully experienced Engineers on hand. Facing a staff capacity constraint...

A comparative study of Lotka-Volterra and system dynamics models for simulation of technology industry dynamics

Ünver, Hakkı Özgür
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 85 leaves
ENG
Relevância na Pesquisa
45.63%
Scholars have developed a range of qualitative and quantitative models for generalizing the dynamics of technological innovation and identifying patterns of competition between rivals. This thesis compares two predominant approaches in the quantified modeling of technological innovation and competition. Multi-mode framework, based on the Lotka-Volterra equation barrowed from biological ecology, provide a rich setting for assessing the interaction between two or more technologies. A more recent approach uses System Dynamics to model the dynamics of innovative industries. A System Dynamics approach enables the development of very comprehensive models, which can cover multiple dimensions of innovation, and provides very broad insights for innovative and competitive landscape of an industry. As well as comparing these theories in detail, a case study is also performed on both of them. The phenomenal competition between two technologies in the consumer photography market; the recent battle between digital and film camera technology, is used as a test case and simulated by both models. Real market data is used as inputs to the simulations. Outputs are compared and interpreted with the realities of the current market conditions and predictions of industry analysts. Conclusions are derived on the strengths and weaknesses of both approaches. Directions for future research on model extensions incorporating other forms of innovation are given...

Case marking (accounts) in collapse: evidence from Early Modern Dutch egodocuments (1572-1573)

Hendriks, Jennifer
Fonte: Australian Linguistic Society; http://www.als.asn.au Publicador: Australian Linguistic Society; http://www.als.asn.au
Tipo: Conference paper; Published Version Formato: 29 pages
Relevância na Pesquisa
45.69%
In this study, I examine the intermediate stages of case marking systems essential for testing hypotheses about the loss of case and its syntactic effects in Dutch. Past accounts typically compare earlier Middle Dutch (1200-1350), when a transparent case system was still in use, with Modern Dutch, which has lost morphological case. Scholars have made claims about the order in which the cases disappeared in Middle Dutch and generally view the end of the 15th century as the point by which the case system had broken down. With a several hundred year gap between the Middle and Modern Dutch periods and no detailed studies chronicling the deflexion process, however, these claims remain largely untested. Using a corpus of 42,000 words comprised mainly of unpublished archival manuscripts—eyewitness accounts chronicling the terror and destruction at the start of the Eighty Years War—I consider the questions of when, how quickly and where the case system collapsed, while situating the discussion in the context of the intense dialect contact situations that prevailed over the period of many centuries in Middle and Early Modern Dutch urban centres.; ANU College of Arts & Social Sciences, School of Language Studies; ANU College of Asia and the Pacific...

O recuo do dativo em -e: análise em regressão logística sobre a variação e mudança da flexão de caso no alemão; The retreat of the dative -e: a logistic regression analysis on the variation and change in case inflection in German

Nobrega, Rogério Ferreira da
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 18/03/2015 PT
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45.64%
O objetivo geral desta dissertação é traçar um panorama da evolução do dativo em -e dentro do contexto do paradigma dos demais casos morfológicos existentes no alemão e detectar prováveis fatores atuando concomitantemente na variação da (não) ocorrência desse marcador de caso. Para tanto, revisitamos o desenvolvimento do sistema de casos do alemão e descrevemos o comportamento e padrões exibidos pelos marcadores de caso de substantivos no singular e no plural. Discutimos a útil noção de declinações forte e fraca, de Grimm (1822), bem como algumas teorias sobre mudança linguística, tais como o enfraquecimento de sílabas átonas (SAPIR, 1921), o surgimento do artigo definido (PHILLIPI, 1997) e da teoria baseada no uso (BARðDAL, 2009). As questões levantadas por essas teorias podem ter contribuído com o paulatino apagamento de marcadores de caso nas línguas germânicas. Não rejeitamos nenhuma delas, haja vista que todas fornecem hipóteses plausíveis, entretanto, a mudança não ocorreu de forma homogênea em diferentes contextos e parece exibir certos padrões que podem ser explicados pela interação de diversos fatores, e não com base apenas nas grandes ideias das teorias descritas acima. Testar a hipótese dessa policausalidade requer o emprego de metodologia específica. Como o fenômeno aqui estudado é a realização vs. não realização do dativo em -e...

The design of a decision support system for supply chain risk management; Decision support system for supply chain risk management

Deshmukh, Vinay (Vinay D.)
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 98 p.
ENG
Relevância na Pesquisa
45.63%
Where can things go wrong? This deceptively simple question has fascinated mankind since time immemorial. The question in fact forms the basis of risk management. The focus of this thesis is the risk management of supply chains. Any factor that is likely to disrupt the procurement, production, or delivery of a good or a service constitutes a supply chain risk. As several case studies from around the world indicate [4], disruptions to an enterprise's supply chain could be catastrophic to business, human safety, market competitiveness, and even national and international economies. It is therefore imperative that an a priori assessment of the factors that pose a risk to the supply chain be conducted and contingency plans developed at strategic, tactical, and operational levels to monitor and mitigate those risks. This thesis will identify all major risks that are likely to disrupt a supply chain; identify the data needed to continuously monitor each risk; suggest a synthesized framework for managing supply chain risks; propose different models to quantify risks and asses their consequences; and suggest guidelines for model use. Further, it will present a case study based on the models developed and propose a decision support system based on these models and necessary data. This work will help enterprises develop risk management plans at the strategic...

The Peloton Approach : forecasting and strategic planning for emerging technologies : a case for RFID; Forecasting and strategic planning for emerging technologies : a case for RFID

Thuvara, Vineet
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 144 p.; 13161589 bytes; 13169179 bytes; application/pdf; application/pdf
ENG
Relevância na Pesquisa
45.58%
The RFID industry is going through a sea of change and at different levels within the industry. Forecasts have been done on different facets of the RFID/EPC industry like the market size or the possible financial returns. However, the forecasts to date are not based on a collective view on the evolving, dynamic and inter-relating nature of such technology covering Retailers, Suppliers and Industry experts on the same landscape. The EPC Peloton Forecasting and Strategic Planning Tool was developed out of a need to collaborate and form consensus around the events and milestones that are critical for the widespread adoption of EPC for the Fast Moving Consumer Goods ("FMCG") industry. Though developed around its need in the RFID space, this tool can be used for decision making around any emerging technology. We are at a critical juncture in the history of RFID where there is excitement among stakeholders and the technology's promise needs to be harnessed by providing the stakeholders with a clear idea of (a) where the technology's future lies and (b) how consensus on how to achieve such a future can be facilitated.; (cont.) The Peloton Approach deals with how to identify or develop a technology forecasting methodology that could capture inputs from all dimensions of the industry and lay down a range of possible future paths. To address the latter issue of collaboration...

Failure record discounting in Bayesian analysis in Probabilistic Risk Assessment (PRA) : a space system application

Lekkakos, Spyridon-Damianos
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 97 p.; 4812806 bytes; 4817860 bytes; application/pdf; application/pdf
ENG
Relevância na Pesquisa
45.63%
In estimating a system-specific binomial probability of failure on demand in Probabilistic Risk Assessment (PRA), the corresponding number of observed failures may be not directly applicable due to design or procedure changes that have been implemented in the system as a result of past failures. A methodology has been developed by NASA to account for partial applicability of past failures in Bayesian analysis by discounting the failure records. A series of sensitivity analyses on a specific case study showed that failure record discounting may result in failure distributions that are both optimistic and narrow. An alternative approach, which builds upon NASA's method, is proposed. This method combines an optimistic interpretation of the data, obtained with failure record discounting, with a pessimistic one, obtained with standard Bayesian updating without discounting, in a linear pooling fashion. The interpretation of the results in the proposed approach is done in such way that it displays the epistemic uncertainties that are inherent in the data and provides a better basis for the decision maker to make a decision based on his / her risk attitude. A comparison of the two methods is made based on the case study.; by Spyridon-Damianos Lekkakos.; Thesis (S.M.)--Massachusetts Institute of Technology...

Modeling an automobile steering system using Axiomatic Design's Design Matrix and the Design Structure Matrix

Bagley, Matthew R., 1966-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 143 p.; 7719124 bytes; 7738026 bytes; application/pdf; application/pdf
ENG
Relevância na Pesquisa
45.67%
The automobile steering system can be thought of as a system within a system. The steering system has clear functions and requirements as well as many interrelated components and subsystems including the front tires, wheels, front suspension, steering gear, intermediate shaft, column and steering wheel. System decomposition is an important aspect of this system analysis. The scope of this thesis is the steering system and steering attributes of a particular new model program code named UXXX. An important element of this research is a case study where an error state called Nibble was discovered late in the program. The attempted resolution of the concern caused much turmoil and drove higher component costs, engineering costs, launch delays, warranty costs and decreased customer satisfaction. The main objective of this work was to execute good system analysis to understand key interactions within the system and to provide documentation and knowledge transfer of key discoveries. A requirement based Design Structure Matrix (DSM) was used as the primary methodology for system analysis. In order to construct the DSMs, Axiomatic Design's Design Matrix (DM) was used to develop Functional Requirements (FRs) and Design Parameters (DPs). The requirements based DSM was derived from the DM. DSMs were created from requirements based interactions...

Software defect tracking during new product development of a computer system

Curhan, Lisa A., 1961-
Fonte: Massachusetts Institute of Technology Publicador: Massachusetts Institute of Technology
Tipo: Tese de Doutorado Formato: 75 p.; 6199802 bytes; 6207472 bytes; application/pdf; application/pdf
ENG
Relevância na Pesquisa
45.55%
Software defects (colloquially known as "bugs") have a major impact on the market acceptance and profitability of computer systems. Sun Microsystems markets both hardware and software for a wide variety of customer needs. The integration of hardware and software is a key core capability for Sun. Minimizing the quantity and impact of software defects on this integration during new product development is essential to execution of a timely and high-quality product. To analyze the effect of software defects on the product development cycle for a midrange computer system, I have used a particular computer platform, the Productl server, as a case study. The objective of this work was to use Sun's extensive database of software defects as a source for data-mining in order to draw conclusions about the types of software defects that tend to occur during new product development and early production ramp. I also interviewed key players on the Productl development team for more insight into the causes and impacts of software defects for this platform. Some of the major themes that resulted from this study include: The impact of defects is not necessarily proportional to their quantity. Some types of defects have a much higher cost to fix due to customer impact...