A Rationale-based Model for Architecture Design Reasoning

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i) Tradeoffs between alternatives 11. I document these types of architecture design rationales: (Frequency of occurrence) a) Design constraints b) Design Assumptions c) Weakness of design d) Cost of design e) Benefit of design f) Complexity of design g) Certainty that design would work h) Certainty that you could implement it i) Tradeoffs between alternatives 12. On an overall scale, the level of documentation of architecture design rationales that I do is: (Level of Documentation) 13. If I do not document architecture design rationale, the reasons are as follows. (Please tick applicable reasons.) a) There are no standards or requirements in the project or organisation to do so b) I am not aware of the need to document it c) Documenting design rationale is not useful d) Time / budget constraints e) Absence of appropriate tools for documenting design rationale f) Other reasons, please specify : _______________(text 256 chars) 14. This is an optional question. If and when I document architecture design rationale, these are the tools, procedures or methods that I use _________________________________________________(text 256 chars) 15. When I design a system or software architecture, I reason about why I make certain design choices. (Frequency of occurrence) 16. I think it is important to use design rationales to justify design choices.. (Level of agreement) 17. In my education or my professional training, I have been trained to make use of design rationales explicitly to justify design choices. (Level of Training) ____________________________________________________________________ 18. I sometimes design architectures to enhance existing systems. Yes / No (if No, go to question 28) 243
19. I revisit architecture design documents and design specifications to help me understand the design of the system for making system enhancements. (Frequency of occurrence) 20. Design rationales of existing systems are important to help me understand previous designs and assess my options in system enhancements and integration. (Level of Agreement) 21. I forget the reasons that justify my designs after a period of time. (Level of forgetfulness) 22. If I am not the designer of an architecture, I may not know why existing designs are created in a certain way without documented design rationale or someone who can explain the design. (Level of Agreement) 23. I do architectural impact analysis during system enhancements and integration to assess how new changes might affect the existing system. (Note: architectural impact analysis is used to analyse the extent and impact of changes to the structure of the system.) (Frequency of occurence) 24. The following items are important when I carry out architectural impact analysis. (Level of Agreement) a) Analyse and Trace Requirements b) Analyse Specifications of Previous Design c) Analyse Design Rationale of Previous Design d) Analyse Feasibility of Implementation e) Analyse Violation of Constraints or Assumptions of Previous Design f) Analyse Scenarios g) Analyse Cost of Implementation h) Analyse Risk of Implementation 25. This is an optional input. Other additional steps that I will take when carrying out impact analysis are _____________________________________________ text(256) ____________________________________________________________________ 26. When I design, I am relatively certain (i.e. I consider the risk factor) that the resulting design will work and I or my team are capable of implementing it. (Level of Certainty) 27. I explicitly quantify the risk of implementation when I design. (Frequency of occurrence) 28. Different potential architecture designs have different degrees of uncertainty, or risk, to achieve the desired business outcomes. (Level of Agreement) 244
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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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5.1. Architecture rationale in the
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5.2. Survey methodology data collec
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5.3. Survey findings experience). I
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5.3. Survey findings Table 5.1: Fre
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5.3. Survey findings Business Goals
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5.3. Survey findings 5.3.5 Document
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5.3. Survey findings Table 5.8 summ
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5.3. Survey findings We used Spearm
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5.3. Survey findings previous desig
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5.4. Discussion of findings Since t
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5.4. Discussion of findings or cons
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5.5. Limitations and use design rat
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Part III The Representation and App
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6.1. A conceptual model for design
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6.2. Architecture Rationale and Ele
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6.2. Architecture Rationale and Ele
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6.3. Architecture elements Figure 6
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6.4. Architecture rationale Figure
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6.4. Architecture rationale • ris
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6.4. Architecture rationale depicts
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6.5. The extended AREL To prevent c
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6.6. A UML representation of AREL a
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6.6. A UML representation of AREL a
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6.7. AREL usability AE by ≪AEsupe
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6.8. Summary The AREL model is exte
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7.1. The EFT system reasoning, a co
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7.1. The EFT system The processing
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7.1. The EFT system not chosen beca
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7.1. The EFT system Figure 7.5: Int
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7.1. The EFT system sequence checki
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7.1. The EFT system Figure 7.7: Dec
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7.1. The EFT system Therefore, in a
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7.1. The EFT system Figure 7.10: De
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7.2. An empirical study to validate
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7.3. Summary The case study is spec
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8.1. Background Based on these assu
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8.2. The architecture rationalisati
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8.3. Other applications of ARM As d
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8.3. Other applications of ARM Figu
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8.3. Other applications of ARM area
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Chapter 9 Architecture rationale an
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9.1. Background 9.1 Background In t
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9.2. Traceability of architecture r
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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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Page 215 and 216: 11.2. Checking AREL models Figure 1
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Page 219 and 220: 11.4. Analysing AREL with BBN • S
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Page 223 and 224: Chapter 12 Conclusions 12.1 Summary
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Page 233 and 234: BIBLIOGRAPHY [10] B. W. Boehm, Soft
Page 235 and 236: BIBLIOGRAPHY [37] A. Eden and R. Ka
Page 237 and 238: BIBLIOGRAPHY [62] J. D. Herbsleb an
Page 239 and 240: BIBLIOGRAPHY [89] N. Lassing, D. Ri
Page 241 and 242: BIBLIOGRAPHY [115] D. L. Parnas,
Page 243 and 244: BIBLIOGRAPHY [142] Z. Simsek and J.
Page 245 and 246: BIBLIOGRAPHY [167] W. F. Tichy, N.
Page 247 and 248: Appendix A AREL Tool User Manual 1
Page 249 and 250: 4.1 AREL Check Model When the Check
Page 251 and 252: 4.2 AREL Model Tracing AREL model t
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Page 265 and 266: Complaint Procedure If you have any
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Page 269 and 270: B. Exploring design reasoning. 1. W
Page 271 and 272: 3. Why does the system use asynchro
Page 273 and 274: C. General Comments on AREL Modelli
Page 275: IEEE Computer Society Press. A. Tan
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