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A 439 University Ave V Suite 820 E Toronto Ontario, M5G 1Y8 Table of Contents Chapter 1 - Fundamental Architectural Concepts..............................................................13 1.1 What is Architecture?..............................................................................................13 1.2 Architecture vs. Design...........................................................................................14 1.3 Qualities of Service (QoS)......................................................................................14 1.4 Common Mechanisms.............................................................................................15 1.5 Architectural Description........................................................................................16 1.6 What Architecture is Not........................................................................................16 1.7 The Need for Architecture......................................................................................17 1.8 The Need for Architecture (Cont…).......................................................................17 1.9 The Architect...........................................................................................................18 1.10 Roles of the Architect............................................................................................19 1.11 Roles of the Architect (Cont…)............................................................................20 1.12 Skills of the Architect............................................................................................20 Chapter 2 - System Architecture Development Guidelines...............................................23 2.1 Security Risks..........................................................................................................Y 23 2.2 Security Risks (Cont...)...........................................................................................L 23 2.3 Performance & Scalability Risks............................................................................24 2.4 Availability & Complexity Risks............................................................................N 25 2.5 Compatibility & Control Risks............................................................................... O 26 2.6 Network Considerations..........................................................................................27 2.7 Latency and Bandwidth...........................................................................................N 27 2.8 Minimize Number of Network Calls.......................................................................O 28 2.9 Minimize Network Call Size...................................................................................I 29 2.10 Firewall Navigation...............................................................................................T 30 2.11 Firewall Navigation (Cont...)................................................................................A 30 2.12 Firewall Navigation (Cont...)U................................................................................31 2.13 Secure Communication.........................................................................................L 32 2.14 Distributed Object Technologies...........................................................................33 2.15 Distributed Object TechnologiesA (Cont...)............................................................34 2.16 Distributed Object VTechnologies (Cont...)............................................................34 2.17 What is a Transaction?E ..........................................................................................35 2.18 Bank Example.......................................................................................................36 2.19 Multiple Users Sharing Data.................................................................................36 2.20 ACID Properties of Transactions..........................................................................37 2.21 Architecture...........................................................................................................37 2.22 Reference Architecture..........................................................................................38 2.23 Patterns..................................................................................................................38 2.24 Development Methodologies................................................................................39 2.25 Open Standards.....................................................................................................40 2.26 Frameworks...........................................................................................................40 2.27 Summary...............................................................................................................41 Chapter 3 - Quality of Service Requirements....................................................................43 3.1 What are Quality of Service Requirements?...........................................................43 3.2 Qualities of Service and Design..............................................................................44 3.3 Quality of Service Inventory...................................................................................44 3.4 Performance............................................................................................................45 3.5 Scalability................................................................................................................45 3.6 Reliability................................................................................................................46 3.7 Availability..............................................................................................................46 3.8 Extensibility............................................................................................................47 3.9 Maintainability........................................................................................................48 3.10 Manageability........................................................................................................48 3.11 Security.................................................................................................................49 3.12 Cultural Adaptability.............................................................................................49 3.13 Portability..............................................................................................................50 3.14 Testability..............................................................................................................50 3.15 Usability................................................................................................................51 3.16 Upgradeability.......................................................................................................51 3.17 Recoverability.......................................................................................................52 3.18 Prioritizing Quality of Service Requirements.......................................................52 3.19 Inspecting QoS Requirements for Trade-off Opportunities..................................53 3.20 Quality of Service Reviews...................................................................................Y 54 3.21 Summary...............................................................................................................L 54 Chapter 4 - Software Architecture Tiers............................................................................N 57 4.1 System Architecture................................................................................................57 4.2 Good Architecture..................................................................................................