A Rationale-based Model for Architecture Design Reasoning

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11.5. Limitations • new links are added or existing links deleted - the CPTs of affected nodes need to be adjusted. Given that the UML repository contains the most current version of the AREL model, and the BBN model already contains some assigned probabilities, the BBN model needs to be updated and synchronised with the current AREL model. Figure 11.13 shows an example of how to synchronise them. • Step 1 - the AREL model has been updated. • Step 2 - the AREL model in UML is converted to the Netica format using the AREL Tool. This is achieved by clicking the Export BBN button to export the AREL model to Netica. • Step 3 - since there already exists a BBN representation of the AREL model prior to the update in Step 1 and we want to retain the probabilities that have already been entered, so we merge the probabilities from the original BBN representation with the newly exported model. This is achieved by using the Merge BBN button to merge the two files. The result of the merge is to create a new BBN model with the latest AREL structure and the probabilities from the previous BBN model merged with the new model. • Step 4 - after merging the two sources, the BBN model now reflects the new AREL structure. However, the nodes in this model which have been affected by any changes require probabilities assignment and/or adjustments. The probabilities can be entered using Netica. Using a combination of Enterprise Architect, AREL Tool and Netica, we provide the necessary tools to automate the design rationale capture, retrieval, traceability, change impact analysis and BBN reasoning. 11.5 Limitations As noted at the beginning of this chapter, we have set ourselves a number of objectives when constructing the AREL tool-set and most of them have been achieved. However, there are a number of limitations. First, AREL operations cannot be tightly integrated with Enterprise Architect. For instance, the AREL operations cannot be directly activated from the Enterprise Architect menu options to fully integrate AREL functionalities into 201
11.5. Limitations Figure 11.13: A Process to Synchronise Change between UML and BBN Enterprise Architect. This is because of a software incompatibility between Enterprise Architect and the Microsoft SOE at the university. The only option that we had at the time was to develop a program to access the Enterprise Architect repository to provide a similar functionality. The usability is compromised because of this restriction. As a prototype to demonstrate the concept, the tool provides sufficient functionality to carry out the key tasks. Second, we have no access to the source code of either Enterprise Architect or Netica, therefore there cannot be a seamless integration where prior probabilities and conditional probability tables can be captured and computed within the UML tool. The integration of the two tools can only be achieved by using our custom-developed programs to access their respective repositories and creating intermediate files for their integration. Finally, although most of the AREL features described in this thesis have been implemented, the AREL tool-set is a proof-of-concept and it is immature for real-life applications. This is because a number of usability features must be implemented if it is to be widely used in a commercial setting. For examples, automatic creation of an AR package; the ability of the UML tool to provide multi-perspective views. Users want to be 202
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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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Page 171 and 172: 9.1. Background 9.1 Background In t
Page 173 and 174: 9.2. Traceability of architecture r
Page 175 and 176: 9.4. AREL and eAREL traceability ap
Page 185 and 186: Chapter 10 Architecture decision de
Page 187 and 188: 10.1. Background 10.1.2 Introductio
Page 189 and 190: 10.2. Building a BBN to represent a
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Page 211 and 212: 11.1. Capturing architecture design
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Page 215 and 216: 11.2. Checking AREL models Figure 1
Page 217 and 218: 11.3. Tracing AREL models Figure 11
Page 219: 11.4. Analysing AREL with BBN • S
Page 223 and 224: Chapter 12 Conclusions 12.1 Summary
Page 225 and 226: 12.2. Contributions reasoning metho
Page 227 and 228: 12.2. Contributions implementations
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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
Page 253 and 254: Figure 9 - result of downward trace
Page 255 and 256: To initiate the graph’s creation,
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Page 259 and 260: Useful Definitions The following ar
Page 261 and 262: ) Some projects only c) Not at all
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Page 265 and 266: Complaint Procedure If you have any
Page 267 and 268: Privacy Protection Only investigato
Page 269 and 270: 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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