Making a communication tool easier for people to operate can have profound and positive effects on its popularity and on the users themselves. This thesis is about making it easier for people to publish web-based documents that have sound, video and text. Readily available software and hardware are employed in an attempt to achieve the goal of providing a software service that enables users to compose audio-video documents with text.

abstract: Multi-tenancy architecture (MTA) is often used in Software-as-a-Service (SaaS) and the central idea is that multiple tenant applications can be developed using compo nents stored in the SaaS infrastructure. Recently, MTA has been extended where a tenant application can have its own sub-tenants as the tenant application acts like a SaaS infrastructure. In other words, MTA is extended to STA (Sub-Tenancy Architecture ). In STA, each tenant application not only need to develop its own functionalities, but also need to prepare an infrastructure to allow its sub-tenants to develop customized applications. This dissertation formulates eight models for STA, and proposes a Variant Point based customization model to help tenants and sub tenants customize tenant and sub-tenant applications. In addition, this dissertation introduces Crowd- sourcing to become the core of STA component development life cycle. To discover fit tenant developers or components to help building and com posing new components, dynamic and static ranking models are proposed. Further, rank computation architecture is presented to deal with the case when the number of tenants and components becomes huge. At last, an experiment is performed to prove rank models and the rank computation architecture work as design. / Dissertation/Thesis / Doctoral Dissertation Computer Science 2017

A adoção de Software como Serviço (do inglês, Software as a Service ou simplesmente SaaS) está em expansão em todo o mundo, alavancada pelas muitas vantagens que esse modelo de distribuição de software oferece tanto para os provedores desses serviços quanto para seus clientes. Em SaaS, o provedor do serviço também é responsável pelo seu desenvolvimento e execução, o que permite a esses provedores fazerem escolhas sobre a arquitetura de seus sistemas visando diminuir a complexidade e os custos relacionados ao seu desenvolvimento e operação. Nesse contexto, um padrão de arquitetura freqüentemente utilizado é o Multitenant, que torna uma mesma instância do software capaz de servir a múltiplos clientes (tenants) simultaneamente. No entanto, sistemas que utilizam Multitenancy enfrentam uma série de desafios, principalmente no que se refere à flexibilidade em atender os requisitos específicos de cada cliente na customização de processos, de fluxos e regras de negócio, e de interfaces com o usuário. Especificamente no problema de customização de interfaces, embora existam trabalhos na literatura relacionados à customização de interfaces Web, e existam implementações de mercado de mecanismos para possibilitar essas customizações, esses trabalhos e mecanismos ou não são projetados especificamente para sistemas Multitenant ou, quando são, não têm sua arquitetura publicada e seu código fonte disponíveis para serem reutilizados. Assim, esta pesquisa investigou uma alternativa para a customização de interfaces Web no contexto de Software como Serviço Multitenant. Como resultado, foi inicialmente definido e implementado um mecanismo não intrusivo para o desenvolvimento de aplicações Multitenant chamado DORMT (Domain-Based Shared-Database Multitenancy), sobre o qual foi possível construir um mecanismo para a customização de interfaces Web, chamado MHT (Multitenant Hierarchical Themes), baseado no padrão MVC (Model-View-Controller ) e nos conceito de temas e de hierarquias / The adoption of Software as a Service (SaaS) is growing worldwide, driven by the many advantages that this software distribution model offers to both service providers and their clients. In SaaS, the service provider is also responsible for the development and the execution of the software, enabling that choices be made in terms of system architecture in order to reduce the complexity and costs related to its development and operation. However, Multitenant systems face a number of challenges, mainly related to flexibility in meeting specific customer requirements in customizing the system processes, flows, business rules and user interfaces. Specifically on the problem of user interface customization, although there are studies in the literature and products on the market that implement mechanism to allow such customizations, these studies and mechanism are not specific to Multitenant systems or the mechanism architecture and source code is not available to be reused. Thus, this study investigated alternatives for Web interfaces customization in the context of Multitenant Software as a Service. As a result, a non intrusive mechanism, called DORMT (Domain-Based Shared-Database Multitenancy), was defined and implemented to allow the development of Multitenant applications, on top of which a mechanism for Web interfaces customization, called MHT (Multitenant Hierarchical themes), based on the MVC pattern, on the concepts of themes and of hierarchies, was built

Submitted by João Arthur Martins (joao.arthur@ufpe.br) on 2015-03-11T17:58:21Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertacao José Lutiano da Silva.pdf: 3688182 bytes, checksum: 3aa20a3af7ab28f4114f4925cef77dcb (MD5) / Approved for entry into archive by Daniella Sodre (daniella.sodre@ufpe.br) on 2015-03-13T13:00:30Z (GMT) No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertacao José Lutiano da Silva.pdf: 3688182 bytes, checksum: 3aa20a3af7ab28f4114f4925cef77dcb (MD5) / Made available in DSpace on 2015-03-13T13:00:30Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertacao José Lutiano da Silva.pdf: 3688182 bytes, checksum: 3aa20a3af7ab28f4114f4925cef77dcb (MD5) Previous issue date: 2013-09-19 / Com o advento do uso de serviços hospedados em cenários de computação em nuvem, presencia-se a necessidade de organizações utilizarem seus benefícios. Neste âmbito, empresas governamentais ainda possuem receio em hospedarem seus dados no ambiente de computação em nuvem, o que por sua vez, faz com que muitas dessas entidades utilizem um modelo de oferta de serviços tradicionais não otimizados no contexto de recursos computacionais. Devido a isso, a computação em nuvem privada surge como ambiente alternativo para hospedagem de serviços dentro da própria infraestrutura da empresa pública, suprimindo as preocupações de conformidades à segurança da informação e adequação do modelo de oferta de serviços. Com o objetivo de discutir e ampliar a literatura acerca do assunto são apresentados passos a serem utilizados para implantação de um cenário em computação em nuvem privada, como solução destes problemas em uma empresa pública de processamento de dados. Como contribuição prática, o estudo apresenta uma solução escalável com baixo investimento, uma vez que todo o cenário proposto é utilizado em ferramental de software livre, permitindo impactos positivos e valor agregado no modelo de oferta de serviços do provedor para os clientes.

This thesis is focused on analyzing the current state of SaaS (Software as a Service) and impact of SaaS on corporate's ICT as a whole. The aim is to explain the concepts and implications of modern forms of providing services, to describe and to evaluate their benefits and risks and to assess future developments in this area. The attention will be paid on specifics of the environment of Czech companies. The first part of this work deals with the current SaaS solutions and related technologies. Emphasis is placed on acquainting the reader with currently available (or introduced by mid-2011) technologies and their mutual relationships. This section also summarizes the current level of knowledge of the field and on this basis provides definitions of areas and technologies. The next part of the thesis focuses on a particular cloud and SaaS solutions available on nowadays market. The next part of this section is based on a specific case study of a small company, which considers the move to SaaS solutions. This section is focused on the practical application of the preceding conclusions. Last section aims at the prediction of development of ICT business in the upcoming years, with an emphasis on SaaS and related technologies. The second part is trying to find answers to the questions "Whether," "When" and "How" will SaaS affect the market of information technologies, their deployment and business models of future anticipated expansion model of Software as a Service. SaaS maturity model is also discussed as well as specificity of the Czech market.

The diploma thesis is focused on a specific way of distribution of Business Intelligence application on Software-as-a-Service base. A different concept opens a possibility for small and medium-size companies which cannot afford robust and expensive solution. The theoretical part provides an introduction with the basic characteristics of BI systems and cloud applications. Additionally, descriptions of the selected criteria are stated for a comparison of the specifics of applications delivered as a service. Integration, analytical and reporting functions Belladati, Zoho Reports and Bime are tested in a practical part of the thesis. The main chapter is devoted to solution product comparison, based on the selected criteria. The main asset of the work is to discover the strengths and weaknesses of each solutions found during the practical testing on the test data. The result of the comparison is not to find the best product, but to enhance the specific properties. The output can serve as a background material during cloud-based BI applications selection.

This thesis is focused on cloud computing and its impact on enterprise resource planning information systems. The historical background of cloud computing is discussed in the first of the thesis. After that, analysis of all possible services and types of cloud computing are provided. In this first part of this thesis, there is also an analysis of cloud computing providers who provide one of the possible cloud computing service - Infrastructure as a Service(IaaS). This thesis evaluates IaaS providers based on suggested methodology. According to this methodology each provider is ranked and the provider with the highest score is used as a provider for outsourcing infrastructure for a new model of information system which is suggested further in the thesis. The next part of this thesis provides a detailed view on cloud computing service closely related to software distribution - Software as a Service(SaaS). This focuses on key features of this approach, there is a discussion about differences between ASP and on-premis approach. At the end of this part there is a detailed discussion about SaaS benefits and risks for customers as well as software vendors. Having discussed all necessary theoretical background a local software company providing mainly on-premise enterprise resource planning information system is described. After all threads and opportunities of this company are analyzed it is suggested to provide a new option of distributing one of its information system to customers - in the form of SaaS. Based on the decision in the previous part, one of the information systems offered to customers is chosen and reengineered in order to allow distribution over the Internet as SaaS. While changing the architecture of the information system, the main focus is to reduce initial costs. A necessary features which need to be changed are analyzed from three perspectives - technological, process and economical. In all of these perspectives there is a discussion about problems which need to be kept in mind. Each problem is analyzed and the solution options are discussed. Towards the end of each problematical part there is a recommendation for the company in order to reach the set goals. The final part is comparing the on-premise system and the SaaS system. The comparison is provided in the customer example. There are calculations for each solution and a discussion about potential attractiveness of a newly designed information system for potential customers.

This Diploma thesis deals with a Software as a Service (SaaS) architecture model in a private business. The goal is to identify factors which influence the decision making process of potential SaaS acquisition and whether the factors are dependent on characteristic of the business. The thesis may serve companies as a guideline to follow customer's SaaS solution demand. In order to achieve the goal, economical, marketing and IT aspects of SaaS are discussed first in the theoretical part. According to these aspects selective factors and business characteristics are determined. Practical part presents a survey which was performed among Czech companies in order to obtain a relevant data enabling to evaluate dependencies between selective factors and business characteristics. After the analysis of the data a result of the survey and identified dependencies are introduced. Furthermore, the author's suggestions to the SaaS suppliers are presented in the conclusion.

The aim of this diploma thesis is to select a suitable task management tool with regards to specific requirements of BNM, s.r.o. company. The list of requirements was compiled based on author's work experience at the particular company. Last but not least the thesis is focused on a solution of identified issues while the theoretical part explains the teamwork theory and team collaboration. Further chapters introduce SaaS oriented software distribution models. The final tool selection is done using a scoring method and WSA (Weighted Sum Product) method belonging to the multi-criteria decision methods category. The decision making proces is further described with a special attention to the selected tool - Asana. None of the considered tools was excluded due to a non-fulfilment of the selection criteria. The main contribution of the thesis is a comparison and evaluation of available task management tools and a selection of a best tool for the one particular company.

Business-to-business customer loyalty management is an essential and long-standing theme in business research and practice. Loyal clients are of great importance within Software-as-a-Service (SaaS), as the business model relies strongly on long-term business relationships, e.g. due to subscription models. Nevertheless, to the best of our knowledge, there is no study on how to design loyalty initiatives used in business-to-business SaaS relationships yet. Therefore, our thesis asks the question “How can loyalty initiatives be designed to improve the loyalty of SaaS business clients?”. By applying a qualitative research methodology with multi-case studies, we were able to investigate the status-quo of customer loyalty management by looking at the vendor side and then analysing the perception of loyalty initiatives, with respect to the client’s perspective. A broad number of in-depth empirical data was collected in semi-structured interviews conducted with employees of six SaaS vendor firms and seven of their clients. As we used an abductive approach, we were able to compare our findings with the existing literature and extend previous theory. Our interview findings were then clustered into eight dimensions, which were based on the customer lifecycle, and various initiatives have been assigned to them. All initiatives included several actions performed by the vendors, which were then classified into three categories, according to how important it was perceived by their clients. We concluded our research with the ‘Design Guide for Loyalty Initiatives’ that summarises our findings and provides an overview for SaaS vendors to review and adjust their initiatives. Hence, we deliver valuable insights for SaaS vendors to gain a deeper understanding of their clients’ needs and to, in turn, prioritise their performed loyalty actions and allocate their budget accordingly.