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25 Cards in this Set
- Front
- Back
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EA |
Enterprise Architecture |
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What does EA guide? |
Investment in IT |
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What should EA be based on? |
Standards |
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What will your IT be like without an EA? |
More expensive Isolated systems Hard to connect externally and internally Difficult to maintain |
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Four benefits of an EA? |
Reduced cost Faster time to market More robust Joined up |
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Guiding principles in developing an EA? |
Business-focused Independent Standards-based State of the market Robust, reliable, supported Flexible Re-use tech Buy service first |
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Three boxes on top fork of EA development diagram |
Develop guiding principles for architecture Identify critical business issues and tech challenges Review and assess current IT developments |
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Three boxes in bottom fork of EA development diagram? |
Identify main business entities and linkages Identify generic business functions/services Develop framework to link components |
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Final two boxes in EA development diagram? |
Identify technology to provide functions Develop migration scenario |
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Define Technical Architecture |
System and network components that make up a distributed system, and how they are connected. |
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What are four application functions to consider in technical architecture? |
Data storage Data access logic Application logic Presentation logic |
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What is a server based technical architecture? |
One where the server performs all four application functions. |
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What is a client based technical architecture? |
One where the client performs most functions, except for data storage. |
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What is client server technical architecture? |
Client does presentation and application logic (thick client). Server does data storage, data access logic, and application logic (thin client). |
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Thick vs thin client? |
Thick: client does application logic. Thin: server does application logic. |
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What is 2-tier client server architecture? |
One server does data storage and access, client does application and presentation logic. |
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3-tier client server? |
Data storage and access logic on one server, application logic on another server, client handles presentation logic. |
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Four attributes of an EA? |
Corporate view Standards based Long term End to end |
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What are four software components of a TA? |
Data storage Data access logic Application logic Presentation logic |
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What are three hardware components of a TA? |
Servers Clients Networks |
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Regression testing |
Checks if software still performs properly after a change. |
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Three objectives of an EA? |
Reliable Flexible Affordable |
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Four things you get without an EA? |
Expensive point solutions Isolated pockets of data Hard to connect externally and internally Difficult to maintain |
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Definition of Enterprise Architecture |
A blueprint of an organisation’s ideal IT - applications, data, and infrastructure - and connections between them. |
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What three things do you need to develop an EA? |
Deep knowledge of business Thorough knowledge of enterprise IT Understanding of business constraints |
