© Leonard Walletzký



}60s
◦Centralized hosting of business applications
◦service bureau
–company which provides business services for a fee
–eg. IBM
–time-sharing
–sharing of a computing resource among many users by means of multiprogramming and multi-tasking
◦utility computing
–a service provisioning model in which a service provider makes computing resources and
infrastructure management available to the customer as needed, and charges them for specific usage
rather than a flat rate
◦mainframes
}

}90s
◦Application Service Provider (ASP)
–thanks to expansion of the Internet
◦class of centralized computing
◦services of
–hosting
–managing specialized business applications
◦reducing costs through
–the solution provider's specialization in a particular business application
–central administration
}

}2001
◦Software as a Service
◦extends the idea of the ASP model
◦software vendors
–first ASPs were focused on managing and hosting of  third-party independent software vendors'
software
◦SaaS
–typically develop and manage their own software
}

}application clients
◦ASP
–Client - Server
–initial ASP used thick clients
◦SaaS
–Thin Clients
–Web browsers
}software architecture
◦ASP
–maintaining a separate instance of the application for each business
◦SaaS
–utilize a multi-tenant architecture
–multiple businesses and users
}

}Well known SaaS
◦Gmail
◦Google Drive
◦Facebook
◦Enterprise Line of Business (LOB) applications market  salesforce.com
}Office
}Messaging
}DBMS software
}management software
}

}CAD software
}development software
}accounting
}collaboration
}project management
}customer relationship management
}management information systems
}enterprise resource planning
}invoicing
}human resource management
}content management
}service desk management
}

}Cloud
}Cloud Service models
}support of scalability
◦horizontal scaling
◦the application is installed on multiple machines
}tenant
◦multi-tenant services
–Vast majority of SaaS solutions
–a single
–version of the application
–configuration
–hardware, network, operating system
–advantage in comparison with traditional software
–multiple physical copies
–potentially different versions
–different configurations
◦"single"-tenant
–rarely
–solved by virtualization
}

}Thin Client
◦Web Browser
}Hybrid
◦Dropbox
}For integration with internal systems
◦Integration protocols
–HTTP
–REST
–SOAP
–JSON
}  Application programming interfaces
}

}Subscription fee
◦User
◦Time unit
–typically
–month
–annual
◦Transaction
◦Support
}Advertising
}
}Freemium
◦basic functionality is for free
◦restrictions in
–capacity
–functionality
–support
–users
–time
–bandwidth
◦money si charged for
–proprietary functions
–functionality
–...
◦multi-tenant
}

}Positive
}Negative
}Strengths
}Opportunities
}Weaknesses
}Threats
•Managers are not IT experts
•They are focused on core business of the companies
•They understand the language of the money
•They see IT as the source of problems and non stability

}Less risky
}Immediate
}Reduce IT support costs
}Initial setup cost for SaaS is typically lower than the equivalent enterprise software
}Architecture
}Economy of Scale
}Enables Mashups

}Customer
◦Lower initial investment
–Software and hardware
◦Even the long time usage price is higher
–Compare with better ROI (return of investments)
–Avoiding the peaks of cash flow (the highest danger is based on unexpected costs)
◦Example
–CRM or ERP system
}Provider has regular income

}SW deploy
}Updates
◦more often
◦update is decided and executed by provider, not by customer
}single configuration
}faster testing
}vendor has access to
◦all customer data
–expediting of design
–regression testing
◦analytics of user behaviour
}

}Migration of data
}Integration of clients
}Tailored customization
}Can't directly access a company's internal systems
}  Customer might be forced to use a new versions
}

}SaaS Integration Platforms
◦Complex systems that integrates particular services
–CRM
–ERP
}Growth of SaaS sales on global market
}Enables Mashups
◦integrating content from more than one SaaS
◦to create a single new service displayed in a single graphical interface
}
}

}Unreliable provider of the service
◦Bankrupt
◦The physical presence of data
}Security and privacy
◦is common corporate infrastructure more secured than data centres of cloud?
◦HTTPS
}Connection
◦Latency
◦Reliability

}SaaS is only one from many solution
}Task is to give proper service for concrete situation
}Managers need to understand
◦Advantages
◦Risks
}To have real expectations

}SaaS is one way to distribute service
}In many points of view has positive influence to both partis business
}Needs to be described and setted properly