Lecture 4: Designing Architectures - PPT, Software Architecture, Engg., Sem. Notes | EduRev

 Page 1


Copyright © Richard N. Taylor, Nenad Medvidovic, and Eric M. Dashofy. All rights reserved. 
Designing 
Architectures 
Software Architecture 
Lecture 4 
Page 2


Copyright © Richard N. Taylor, Nenad Medvidovic, and Eric M. Dashofy. All rights reserved. 
Designing 
Architectures 
Software Architecture 
Lecture 4 
Foundations, Theory, and Practice Software Architecture 
2 
Where do architectures come from? 
Method 
1) Efficient in familiar terrain 
2) Not always successful  
3) Predictable outcome (+ & - ) 
4) Quality of methods varies 
Creativity 
1) Fun! 
2) Fraught with peril 
3) May be unnecessary 
4) May yield the best result 
How Do You Design? 
Page 3


Copyright © Richard N. Taylor, Nenad Medvidovic, and Eric M. Dashofy. All rights reserved. 
Designing 
Architectures 
Software Architecture 
Lecture 4 
Foundations, Theory, and Practice Software Architecture 
2 
Where do architectures come from? 
Method 
1) Efficient in familiar terrain 
2) Not always successful  
3) Predictable outcome (+ & - ) 
4) Quality of methods varies 
Creativity 
1) Fun! 
2) Fraught with peril 
3) May be unnecessary 
4) May yield the best result 
How Do You Design? 
Foundations, Theory, and Practice Software Architecture 
3 
Objectives 
? Creativity 
? Enhance your skill-set 
? Provide new tools 
? Method 
? Focus on highly effective techniques 
? Develop judgment: when to develop novel solutions, and 
when to follow established method 
 
 
Page 4


Copyright © Richard N. Taylor, Nenad Medvidovic, and Eric M. Dashofy. All rights reserved. 
Designing 
Architectures 
Software Architecture 
Lecture 4 
Foundations, Theory, and Practice Software Architecture 
2 
Where do architectures come from? 
Method 
1) Efficient in familiar terrain 
2) Not always successful  
3) Predictable outcome (+ & - ) 
4) Quality of methods varies 
Creativity 
1) Fun! 
2) Fraught with peril 
3) May be unnecessary 
4) May yield the best result 
How Do You Design? 
Foundations, Theory, and Practice Software Architecture 
3 
Objectives 
? Creativity 
? Enhance your skill-set 
? Provide new tools 
? Method 
? Focus on highly effective techniques 
? Develop judgment: when to develop novel solutions, and 
when to follow established method 
 
 
Foundations, Theory, and Practice Software Architecture 
4 
Engineering Design Process 
? Feasibility stage: identifying a set of feasible concepts 
for the design as a whole 
? Preliminary design stage: selection and development of 
the best concept. 
? Detailed design stage: development of engineering 
descriptions of the concept. 
? Planning stage: evaluating and altering the concept to 
suit the requirements of production, distribution, 
consumption and product retirement. 
Page 5


Copyright © Richard N. Taylor, Nenad Medvidovic, and Eric M. Dashofy. All rights reserved. 
Designing 
Architectures 
Software Architecture 
Lecture 4 
Foundations, Theory, and Practice Software Architecture 
2 
Where do architectures come from? 
Method 
1) Efficient in familiar terrain 
2) Not always successful  
3) Predictable outcome (+ & - ) 
4) Quality of methods varies 
Creativity 
1) Fun! 
2) Fraught with peril 
3) May be unnecessary 
4) May yield the best result 
How Do You Design? 
Foundations, Theory, and Practice Software Architecture 
3 
Objectives 
? Creativity 
? Enhance your skill-set 
? Provide new tools 
? Method 
? Focus on highly effective techniques 
? Develop judgment: when to develop novel solutions, and 
when to follow established method 
 
 
Foundations, Theory, and Practice Software Architecture 
4 
Engineering Design Process 
? Feasibility stage: identifying a set of feasible concepts 
for the design as a whole 
? Preliminary design stage: selection and development of 
the best concept. 
? Detailed design stage: development of engineering 
descriptions of the concept. 
? Planning stage: evaluating and altering the concept to 
suit the requirements of production, distribution, 
consumption and product retirement. 
Foundations, Theory, and Practice Software Architecture 
5 
Potential Problems 
? If the designer is unable to produce a set of feasible 
concepts, progress stops. 
? As problems and products increase in size and 
complexity, the probability that any one individual can 
successfully perform the first steps decreases.  
? The standard approach does not directly address the 
situation where system design is at stake, i.e. when 
relationship between a set of products is at issue.  
? ? As complexity increases or the experience of the 
designer is not sufficient, alternative approaches to the 
design process must be adopted.