ict infrastructure services
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Enterprise ArchitectureICT infrastructure services
HardwareMobile devices, laptop/ desktop workstationsServers, mainframes, …Printers, scanners, etc.
SoftwareSystem software, applications
NetworkingLAN, WANSwitch, router, etc.
Option 1Buy/lease and manage in-house
Option 2Use service via internet
Inhouse Softwareas a Service
Platformas a Service
Infrastructureas a Service
Use IT infrastructure
for any purpose
Use applications on
demand
Build, run and manage web applications
Use IT infrastructure
for any purpose
Applicationsand data ✓System software (runtimes, middleware, O/S)
✓ ✓Hardware (virtualisation, servers, storage, networking)
✓ ✓ ✓
Examples:Salesforce.com
Webex.comDropbox.com
Heroku.comGoogle App
Engine
AWSMicrosoft Azure
Inhouse Softwareas a Service
Platformas a Service
Infrastructureas a Service
Use IT infrastructure
for any purpose
Use applications on
demand
Build, run and manage web applications
Use IT infrastructure
for any purpose
Applicationsand data ✓System software (runtimes, middleware, O/S)
✓ ✓Hardware (virtualisation, servers, storage, networking)
✓ ✓ ✓
Examples:Salesforce.com
Webex.comDropbox.com
Heroku.comGoogle App
Engine
AWSMicrosoft Azure
Inhouse Softwareas a Service
Platformas a Service
Infrastructureas a Service
Use IT infrastructure
for any purpose
Use applications on
demand
Build, run and manage web applications
Use IT infrastructure
for any purpose
Applicationsand data ✓System software (runtimes, middleware, O/S)
✓ ✓Hardware (virtualisation, servers, storage, networking)
✓ ✓ ✓
Examples:Salesforce.com
Webex.comDropbox.com
Heroku.comGoogle App
Engine
AWSMicrosoft Azure
Inhouse Softwareas a Service
Platformas a Service
Infrastructureas a Service
Use IT infrastructure
for any purpose
Use applications on
demand
Build, run and manage web applications
Use IT infrastructure
for any purpose
Applicationsand data ✓System software (runtimes, middleware, O/S)
✓ ✓Hardware (virtualisation, servers, storage, networking)
✓ ✓ ✓
Examples:Salesforce.com
Webex.comDropbox.com
Heroku.comGoogle App
Engine
AWSMicrosoft Azure
© Online Learning Institute
Enterprise ArchitectureICT infrastructure services
© Online Learning Institute
Enterprise ArchitectureEnterprise architecture frameworks
Enterprise architectureEnterprise architect
Enterprise
Architecture
The Open Group
Method, frameworks, models, guidelines and techniques for IT architecture
Technology-neutral
Software and hardware to support business, data and application services
Blueprints for applications, their interaction and relationships to business processes
Software and hardware to support business, data and application services
Structure of organisation’s data assets and data management resources
Blueprints for applications, their interaction and relationships to business processes
Software and hardware to support business, data and application services
Business strategy, governance, organisation and key business processes
Structure of organisation’s data assets and data management resources
Blueprints for applications, their interaction and relationships to business processes
Software and hardware to support business, data and application services
Zachman framework
Roles in design processes Product abstractions
Levels of abstraction
Perspectives on organisation
and IT
By Ideasintegration(image) + SunSw0rd(text) - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=20113287
IEEE Standard 1471 (2000) Adopted by ISO in 2007 as ISO/IEC 42010
Method-neutral
Architecture description
Architecture viewpoint
Architecture framework
Architecture description language
https://www.forbes.com/sites/jasonbloomberg/2014/07/11/is-enterprise-architecture-completely-broken/#1eb227ca3710
“70% of organizations are starting or restarting an EA program”
“EA practitioners do not spend time creating actionable deliverables that have a direct … linkage back to business strategy and … outcomes “
Gartner 2016https://www.gartner.com/binaries/content/assets/events/keywords/enterprise-architecture/ea19/avoid-the-13-worst-ea-practices-and-navigate-to-ea-success.pdf
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Enterprise ArchitectureEnterprise architecture frameworks
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Enterprise ArchitectureEnterprise application integration
System integrationLinking applications
Sharing data
Avoiding duplication
Aim: seamless processes
Example: Web order
Example: Web orderCustomer management system
Inventory management system
Product management systems
Billing systems
External systems such as TNT
Application spaghetti
Source: Gartner Research
Application integration Point-to-point interfaces
Middleware, e.g. SOA/ enterprise bus
ERP systems
Arkramer [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/)], from Wikimedia Commons
Arkramer [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/)], from Wikimedia Commons
Messages and middleware
Machine A Machine B Machine C
Middleware Services
Windows Mac OS X Linux
Network
Messages
Loose couplingEssential
Message-oriented approach helps create loosely-coupled systems
Advantages• Real time data sharing
• Simpler processes, efficiency
• Data integrity
• Ease of development and maintenance
Disadvantages• High development costs
• Requires smart design
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© Online Learning Institute
Enterprise ArchitectureEnterprise application integration