A Rationale-based Model for Architecture Design Reasoning

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7.1. The EFT system how each component is implemented is not disclosed. Figure 7.1 is the high-level use case of the system. The system is connected to all member banks in Guangzhou and its neighbouring cities. Local payment instructions which can be settled within the area are processed by the EFT System. Non-local payment instructions such as remittance of funds to other parts of China are forwarded to the Electronic Interbank System (EIS) system, which is a satellite link to the national payment centre in Beijing. The EFT system interface to the China National Automated Payment System (CNAPS) system was part of the plan but it had not been implemented. Figure 7.1: A Use Case of the EFT System A payment instruction is either a credit instruction to pay or a debit instruction to request payment. Inter-bank payment instructions are settled by the central bank. It means that the central bank acts as an agent to ensure that participating member banks have enough funds to cover their financial positions. A key application of the EFT system is the High Value Payment System (HVPS) which is a real-time gross settlement application. It settles high value payment instructions in real-time to ensure banks could settle their financial obligations. This is crucial for the stability of any financial system by mitigating systemic risks. 1 The Settlement Account Management (SAM) is an accounting system which keeps track of the balances of member banks’ settlement accounts and monitoring settlement activities. 1 Similar Real Time Gross Settlement (RTGS) systems are implemented in various countries such as Australia [133]. 107
7.1. The EFT system The processing services and the communication services are the backbone of the EFT system. They handle the transmission and the processing of payment messages. Since the EFT system was intended to act as a gateway to the EIS system and the CNAPS system, multiple messaging protocols support are required. In the case study, we illustrate the processing services and specifically the payment message processing layer to outline some of its architecture design and design rationale. Figure 7.2: Processing Services of the EFT System Figure 7.2 illustrates the key functionality of the processing services. External parties such as member banks and EIS systems connect to the EFT system using different communication and messaging protocols. The communication service layer is responsible for handling different communication protocols that are used by different external parties. Messages are passed onto the processing services layer where a payment message would be decrypted, checked for authenticity and processed. When a message has passed all the validation checks, it is passed to the central bank applications for payment queuing and settlement. 108
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A Rationale-based Model for Archite
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maintenance. These techniques can h
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Declaration This thesis contains no
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2.2.6 DoD Architecture Framework .
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5.4.6 Risk assessment in architectu
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8.2 The architecture rationalisatio
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12.2 Contributions . . . . . . . .
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6.10 ≪AR≫ and ≪AAR≫ Stereot
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11.13A Process to Synchronise Chang
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5.13 Design Rationale Helps Evaluat
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that architecture design is highly
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1.2. Research motivations and resea
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1.2. Research motivations and resea
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1.4. Structure of the thesis the ch
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Part I Problem Analysis 10
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2.1. Industry practice of design ra
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2.2. Architecture frameworks and de
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Chapter 3 Related work in design ra
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3.2. Why do we need design rational
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3.2. Why do we need design rational
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3.3. Existing methods for capturing
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3.4. Other related studies 3.3.7 Qu
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3.4. Other related studies evolutio
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3.5. How well design rationale meth
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3.5. How well design rationale meth
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Chapter 4 Research methodology and
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4.1. Software engineering research
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4.2. The chosen research and valida
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Part II Architecture Design Rationa
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on a regular basis. Their inputs ha
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Page 77 and 78: 5.2. Survey methodology data collec
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Page 83 and 84: 5.3. Survey findings Business Goals
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Page 87 and 88: 5.3. Survey findings Table 5.8 summ
Page 89 and 90: 5.3. Survey findings We used Spearm
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Page 93 and 94: 5.4. Discussion of findings Since t
Page 95 and 96: 5.4. Discussion of findings or cons
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Page 99 and 100: Part III The Representation and App
Page 101 and 102: 6.1. A conceptual model for design
Page 103 and 104: 6.2. Architecture Rationale and Ele
Page 105 and 106: 6.2. Architecture Rationale and Ele
Page 107 and 108: 6.3. Architecture elements Figure 6
Page 109 and 110: 6.4. Architecture rationale Figure
Page 111 and 112: 6.4. Architecture rationale • ris
Page 113 and 114: 6.4. Architecture rationale depicts
Page 115 and 116: 6.5. The extended AREL To prevent c
Page 117 and 118: 6.6. A UML representation of AREL a
Page 119 and 120: 6.6. A UML representation of AREL a
Page 121 and 122: 6.7. AREL usability AE by ≪AEsupe
Page 123 and 124: 6.8. Summary The AREL model is exte
Page 125: 7.1. The EFT system reasoning, a co
Page 129 and 130: 7.1. The EFT system not chosen beca
Page 131 and 132: 7.1. The EFT system Figure 7.5: Int
Page 133 and 134: 7.1. The EFT system sequence checki
Page 135 and 136: 7.1. The EFT system Figure 7.7: Dec
Page 137 and 138: 7.1. The EFT system Therefore, in a
Page 139 and 140: 7.1. The EFT system Figure 7.10: De
Page 141 and 142: 7.2. An empirical study to validate
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Page 153 and 154: 8.1. Background Based on these assu
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Page 169 and 170: Chapter 9 Architecture rationale an
Page 171 and 172: 9.1. Background 9.1 Background In t
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9.4. AREL and eAREL traceability ap
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Chapter 10 Architecture decision de
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10.1. Background 10.1.2 Introductio
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10.2. Building a BBN to represent a
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10.3. Reasoning about change impact
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10.5. Summary design object may cau
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11.1. Capturing architecture design
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11.1. Capturing architecture design
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11.2. Checking AREL models Figure 1
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11.3. Tracing AREL models Figure 11
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11.4. Analysing AREL with BBN • S
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11.5. Limitations Figure 11.13: A P
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Chapter 12 Conclusions 12.1 Summary
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12.2. Contributions reasoning metho
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12.2. Contributions implementations
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12.3. Future work architecture deci
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12.3. Future work to examine the co
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BIBLIOGRAPHY [10] B. W. Boehm, Soft
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BIBLIOGRAPHY [37] A. Eden and R. Ka
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BIBLIOGRAPHY [62] J. D. Herbsleb an
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BIBLIOGRAPHY [89] N. Lassing, D. Ri
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BIBLIOGRAPHY [115] D. L. Parnas,
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BIBLIOGRAPHY [142] Z. Simsek and J.
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BIBLIOGRAPHY [167] W. F. Tichy, N.
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Appendix A AREL Tool User Manual 1
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4.1 AREL Check Model When the Check
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4.2 AREL Model Tracing AREL model t
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Figure 9 - result of downward trace
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To initiate the graph’s creation,
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onto the diagram 14 Assign values t
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Useful Definitions The following ar
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) Some projects only c) Not at all
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19. I revisit architecture design d
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Complaint Procedure If you have any
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Privacy Protection Only investigato
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B. Exploring design reasoning. 1. W
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3. Why does the system use asynchro
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C. General Comments on AREL Modelli
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IEEE Computer Society Press. A. Tan
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