This thesis provides a tour of main software development methods and their assimilation with usability. Various software development methods have been developed since the origin of software products, and with integration of usability they have achieved great heights. Software developers and researchers are also keen to integrate usability with their methods to develop a successful software product, as their product might not lose its grip over their competitors. This thesis is a preliminary literature review that provides solutions to key questions such as: Which development methods are used in projects with high demands on usability?Do agile methods positively contribute to the usability of the product? Do projects with high demands on usability use usability specialists?Which types of usability are addressed in articles relating development methods and usability? The research aim is to identify how software development methods deal with usability. This thesis clearly discusses about previous empirical studies on software development methods and usability. In this thesis, Kitchenham’s systematic literature review was followed to extract the knowledge from the databases (Inspec and ACM). Validation on the literature is performed using Cohen’s kappa value with a researcher. Four research questions mentioned above are discussed in detail to analyse the results. Agile software development methods have been widely deployed due to its iterative, incremental approach and positive contribution towards usability rather than traditional approach. The role of an usability expert has been analyzed in this thesis and their need in the development process. Futhermore, various usability types like satisfaction, efficiency and effectiveness have also been discussed in detail. Finally, this thesis suggess a solution of incorporating usability with software development methods.

The diploma thesis deals with changes for streamlining project management, software development and work in development teams by introducing the agile Scrum methodology. The beginning of the diploma thesis deals with the theoretical background and basic concepts that are used in other parts of the work. The analytical part analyses the current state of the software division. In the design part, based on the results of the analysis, a proposal for changes in project management is created using the agile methodology, which aims to streamline project management and software development. At the end of the design part, economic evaluations of the design and its benefits for the division are processed.

Software industry is getting very competitive in the wake of recession. In most cases, an organization that quotes a lower price and promises to deliver the product at the earliest walks away with the project. But the factor of quality of the product delivered is also very important because that in turn determines the reputation of an organization, which also plays an important role in getting the next project. Interactions in a software development are dynamic in nature and involve human factors. Models are built taking into account all possible factors so as to present a realistic picture of the development process. System dynamics methodology is used to build these models in Vensim. Three models have been proposed to help manager estimate an approximate time and cost of the project, monitor the project once the timeline is set and monitor the project development to change various factors as the development process goes through various phases of development and testing.

No description available.

Submitted by Caroline Xavier (caroline.xavier@pucrs.br) on 2017-06-23T15:01:28Z No. of bitstreams: 1 DIS_ILDO_INES_ROBAO_MASSITELA_COMPLETO.pdf: 2008637 bytes, checksum: 895eea8912eb209a16b0a13fa5ec0421 (MD5) / Made available in DSpace on 2017-06-23T15:01:28Z (GMT). No. of bitstreams: 1 DIS_ILDO_INES_ROBAO_MASSITELA_COMPLETO.pdf: 2008637 bytes, checksum: 895eea8912eb209a16b0a13fa5ec0421 (MD5) Previous issue date: 2016-03-23 / Conselho Nacional de Pesquisa e Desenvolvimento Cient?fico e Tecnol?gico - CNPq / The proliferation of the use of software on a daily basis from various institutions is an indisputable fact, whether academic institutions, industrial, commercial, among others. This great looking software creates a great pressure environment in academia and software industry regarding the responsiveness of the great demand. The performance assessment can be a major benefit to the institutions, decision-making can contribute in increasing and improving the responsiveness of growing demand. This paper aims to show, based on a case study, the use of stochastic modeling for performance evaluation of a software development team that has the waterfall model based software design. Despite being a model that has been criticized, it has been a feature in various software projects for its rigid structure and focused management. Some of the factors that ensure a good management are very different design phases where one phase does not start without the other has finished and documentation that helps to focus the institutional history over time. / O prolifera??o do uso de softwares no dia a dia de diversas institui??es ? um fato incontest?vel, quer seja institui??es acad?micas, industriais, comerciais, dentre outras. Esta grande procura de softwares cria um ambiente de grande press?o na academia e na ind?stria de software no que se refere a capacidade de resposta da grande demanda. A avalia??o de desempenho pode ser um dos grandes benef?cios para as institui??es, na tomada de decis?es que podem contribuir no aumento e melhoria da capacidade de resposta da crescente demanda. O presente trabalho tem como objetivo mostrar, com base num estudo de caso, a aplica??o de modelagem estoc?stica para avalia??o de desempenho de uma equipe de desenvolvimento de software que tem o modelo de processos Waterfall como base do projeto de software. Apesar de ser um modelo que vem sofrendo cr?ticas, tem sido um recurso em v?rios projetos de software pela sua estrutura r?gida e muito focada no gerenciamento. Alguns dos fatores que garantem um bom gerenciamento s?o as fases do projeto bem distintas, onde uma fase n?o se inicia sem que a outra tenha terminado e o foco para documenta??o que ajuda no hist?rico institucional ao longo do tempo.

The Electrical Submersible Pump (ESP) manufactured by Baker Hughes, model no. WJE-1000 is designed for wells that are expected to have a high content of abrasive solids. It is a mixed flow, tandem compression type pump. Although the erosion of the pump diffuser and impeller stages are significant, the ESP study shows that the most sever failure is due to components that affect the pump’s rotor dynamics such as radial bearings and impeller seals when eroded with 100 mesh sand. Erosion of these seals will result in an internal leakage that can significantly affect stage pressure rise, efficiency, power consumption, vibration, pump life and running cost. The erosion study utilizing 100 mesh fracture sand at 0.2% concentration, with the pump operating at 3600 RPM, 40 PSI intake pressure, 1150 GPM for over 117 hours comparisons are made to the pump’s baseline performance. Measurements of the rotor bearings, impeller seals and their corresponding stators showed that the wear patterns generally increase with time and differ by location. Stage 1 bearings and seals suffered the least amount of erosion and stage 3 rotor components suffered the most erosion. The maximum change in stage 3 bearing clearances was 223% and the maximum change in stage 3 impeller seal clearances was 300%. Performance wise the total pump efficiency dropped by 6.77%, the total pressure rise dropped by 6.3%, the pump’s best efficiency point decreased by 0.78%, and the power consumption increased by 0.49%. Pump vibration patterns also changed with time and by location. The maximum shaft orbit diameter was at stage 3 and it grew 643% in diameter after 117 hours of erosion. The waterfall plots of the pump’s ramp up changed significantly with time. After 117 hours at 3600 RPM, sub-synchronous oscillations at 67% of the synchronous speed dominated the amplitude peaks showing that the rotor vibration locked with the rotor’s first natural frequency at around 2500 RPM. After 117 hours, another sub-synchronous started showing a peak at the rotor’s second natural frequency at 1500 RPM.

This thesis seeks to better understand how a combination of different project management approaches could lead organisations to cope with project closure in more effective ways. More specifically, a coexistence of Waterfall and Agile project management is examined and presented as positive contribution to insurance and investment organisations for more effective transitions from project management to business-as-usual. A comprehensive framework combines within the theoretical chapters the hybrid approach between Agile and traditional project management for successfully closing projects. It represents the lens through which the empirical material can be analysed.The empirical work is based on a single-holistic case study of Intesa Sanpaolo Life dac, incorporating seven semi-structured interviews with the most authoritative individuals of this company in relation to the topic of this paper. This case study provides a deep insight on project closure management which is addressed by investigating challenges and highlighting effective practices of the company in question. Throughout the analysis of the data gathered, the authors managed to highlight findings which provide managerial and theoretical contributions.The originality and the value of this research is given by the fact that this work expects to enrich project-based organisations which use a combination between Agile and traditional project management and struggle to get a proper project closure and transit to the operation phase. Consequently, this represents a completely new point of view in the literature related to project management, which sees project closure as the most understudied phase of the project life-cycle.

Ce travail s’inscrit dans le cadre global de la restauration des cours d’eau pollués par une intensification des mécanismes d’autoépuration, en particulier la dégradation de la matière organique et de l’azote. L’objectif principal de cette étude est d’évaluer et modéliser la capacité de transfert d’oxygène air-eau par les principaux ouvrages hydrauliques à savoir les cascades en marches d’escalier et les chutes d’eau. Les expériences d’aération menées dans un pilote de laboratoire modulable, servant à la fois de cascade et de chute d’eau, ont permis d’évaluer le potentiel d’aération de ces structures, ainsi que d’étudier les effets des paramètres géométriques et opératoires. En première approche, une corrélation semi-empirique globale de calcul d’efficacité d’aération dans les cascades, avec un large spectre de validité, a été élaborée, en fonction du débit, nombre de marches et pente de la cascade, sur la base de nos mesures expérimentales et des données collectées dans les publications. La même démarche a été suivie pour élaborer une corrélation semi-empirique permettant une estimation de l’efficacité d’aération dans les chutes d’eau en fonction de la hauteur de chute, le niveau d’eau en aval et le débit d’écoulement. Afin de rendre compte des caractéristiques du phénomène de transfert dans les cascades d’eau (aire interfaciale d’échange air-eau et volume d’eau), des expériences de traçage ont été associées aux expériences d’aération ce qui a permis de mesurer le volume d’eau et de corréler le coefficient de transfert volumique d’oxygène kLa avec les différents paramètres intervenant dans les mécanismes d’aération. L’aire spécifique interfaciale a été simulée numériquement via l’approche VOF en fonction des conditions opératoires et géométriques. Une équation prédictive de calcul du coefficient de transfert du film liquide kL en fonction des paramètres d’influence a été obtenue à l’issu de l’ensemble des simulations et des mesures d’aération expérimentales / This work represents a part of polluted watercourses restoration by intensification of self-purification mechanisms essentially the degradation of organic matter and nitrogen. The main objective is to evaluate and model the air-water oxygen transfer by major hydraulic structures, namely stepped cascades and waterfalls. Aeration experiments conducted in a geometrically adjustable laboratory pilot, serving as stepped cascade and waterfall were used to assess the aeration potential of these structures as well as to study the geometrical an operating parameters effects. In a first approach, a global semi-empirical correlation for aeration efficiency calculation in stepped cascades, valid for a wide range of parameters, was developed, depending on water discharge, number of steps and chute slope, basing on our experimental measurements and data collected in publications. The same procedure was followed for developing a semi-empirical correlation to estimate the aeration efficiency of waterfalls in terms of the chute height, downstream water level and flowrate. In order to take into account the oxygen transfer phenomenon characteristics in stepped cascade (water volume and air-water exchange interfacial area), tracer experiments were associated with aeration experiments to allow measuring water volume and correlating the volume oxygen transfer coefficient kLa with the various parameters involved in the aeration mechanism. The interfacial specific area was numerically simulated using VOF approach depending on operating and geometrical parameters. A predictive equation for liquid film transfer coefficient kL calculation based on the parameters of influence was issued from both the simulations and experimental aeration measures

Diplomová práce se zaměřuje na zefektivnění procesu řízení ve vývoji softwaru, a to integrováním agilní metodiky Scrum do projektu. Navrhnuté řešení obsahuje stěžejní principy a součásti metodologie a jejich konkrétní doporučenou aplikaci v projekte ABC v soulade s jeho specifikami.

Diplomová práce se zabývá problémy řízení projektů pro vytvoření mobilní aplikace a jejich řešením pomocí agilních metod řízení projektů. V práci je analyzován současný stav projektu a jednotlivé přístupy. Práce se zaměřuje na výběr metody a navrhuje její aplikování na projekt.