Storytelling In Lugano 2009-04-28
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I used this set of slides for a lecture on delivering presentations at the University of Lugano (2009-04-28)
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Storytelling In Lugano 2009-04-28
- 1. www.tudor girba.com Presenting in Lugano Tudor Gîrba www.tudorgirba.com
- 2. www.tudor Roadmap girba.com • Every talk must start with a roadmap • So: • Introduction • Example presentation • Slides • Template • Audience • Story • More slides • Conclusion © Tudor Girba Lugano - April 28, 2009 2
- 3. www.tudor About this talk girba.com • I used to be extremely afraid of speaking in public • In fact, I was so afraid that I could hardly speak • But, because I ithad to speak, I spent a bit of time thinking about • Today, Ido presentations some of my reflections on will share with you how to • I am actually quite nervous to talk about it here © Tudor Girba Lugano - April 28, 2009 3
- 4. www.tudor Roadmap girba.com • Every talk must start with a roadmap • So: • Introduction • Example presentation • Slides • Template • Audience • Story • More slides • Conclusion © Tudor Girba Lugano - April 28, 2009 4
- 5. www.tudor girba.com Example presentation: Assessing your software systems with better tools Tudor Gîrba - www.tudorgirba.com
- 6. www.tudor Roadmap girba.com • Context • Software assessment • Problem • Challenges • Conclusions © Tudor Girba Lugano - April 28, 2009 6
- 7. www.tudor Context girba.com • Software evolves continuously to meet ever changing requirements • Lehmann Law: As a program evolves, it becomes more complex, and extra resources are needed to preserve and simplify its structure • 50%-75% of total effort in a successful project is spent on maintenance • Where maintenance means the period after the first release © Tudor Girba Lugano - April 28, 2009 7
- 8. www.tudor Context girba.com • Software evolves continuously to meet ever changing requirements • Lehmann Law: As a program evolves, it becomes more complex, and extra resources are needed to preserve and simplify its structure • 50%-75% of total effort in a successful project is spent on maintenance • Where maintenance means the period after the first release © Tudor Girba Lugano - April 28, 2009 7
- 9. www.tudor Software assessment girba.com • We need to assess the system to take informative decisions • The developer needs to know what and how to change when a change request comes his way • The architect needs to know if the code conforms to the overall architecture • The manager needs to know the status of the project • The client needs to know what happens in between releases © Tudor Girba Lugano - April 28, 2009 8
- 10. www.tudor Problem girba.com • Software is large and complex • … and it contains lots of details that are not always relevant • As systems evolve and as time pressure increases • Quality drifts • Documentation gets obsolete • Knowledge gets lost • Problem: how to effectively understand all these details? © Tudor Girba Lugano - April 28, 2009 9
- 11. www.tudor Techniques girba.com • Reversesystem Engineering is the process of analyzing a subject • to identify the systemʼs components and their interrelationships and • create representations of the system in another form or at a higher level of abstraction • There are many techniques: • Metrics, visualization, queries … • We need to combine techniques to obtain a complete picture © Tudor Girba Lugano - April 28, 2009 10
- 12. www.tudor Metrics girba.com • Metrics compress the system into numbers • There are a large number of metrics available • Various aspects • Size: LOC (lines of code), NOM (number of methods) … • Complexity: CYCLO (McCabe cyclomatic complexity) ... • Coupling, cohesion: TCC (tight class cohesion) … • Numbers need to be interpreted and put in context © Tudor Girba Lugano - April 28, 2009 11
- 13. www.tudor Queries girba.com • Queries can encode known rules to detect: can be run and they automatically against the system • Problems • Places of interest • Detection Strategies are metrics based rules to detect design flaws Class uses directly more than a few attributes of other classes ATFD > FEW Functional complexity of the class is very high AND GodClass WMC ! VERY HIGH Class cohesion is low TCC < ONE THIRD © Tudor Girba Lugano - April 28, 2009 12
- 14. www.tudor Visualization girba.com • Visualization encodes the system details into pictures • We are visual beings and we in one glimpseoverview of can obtain an large amounts of information • Many visualizations are available • Structure, relationships, … • Visualizations can be combined with metrics © Tudor Girba Lugano - April 28, 2009 13
- 15. www.tudor Conclusions girba.com • Software software is complex and presents many details that are difficult to understand • We need to look at from multiple perspectives • metrics, queries visualizations, etc. • Moose is a platform for software analysis (http:// moose.unibe.ch) • … but, software is an asset • Software needs to be approached in its entirety © Tudor Girba Lugano - April 28, 2009 14
- 16. www.tudor Roadmap girba.com • Every talk must start with a roadmap • So: • Introduction • Example presentation • Slides • Template • Audience • Story • More slides • Conclusion © Tudor Girba Lugano - April 28, 2009 15
- 17. www.tudor Slides girba.com • Every decent talk is accompanied by slides • Text is first level bulletsso, slides should not have more difficult to read than 6 • The text should be no smaller than 12 pt • A good slide has an engaging design • Donʼt just use a standard design • Show that you care • Letʼs see what a good template is made of ... © Tudor Girba Lugano - April 28, 2009 16
- 18. www.tudor The template in 4 steps girba.com 1. Align title to the left, and add logo to the top right • The logo should not be too large, but it should be visible at all time • Adding it to the right, makes it secondary in the visual hierarchy so that it is not compete with the rest of the text 2. Choose colors and style to match the corporate look 3. Delimit the title zone and readjust the style 4. Add footer • Slide number is important to let the audience know about the progress • Add your name, just in case they forgot it • Add the date and place of the presentation to show that it is customized for the situation © Tudor Girba Lugano - April 28, 2009 17
- 19. STOP
- 20. why are we here?
- 21. not the talk is slides your
- 22. story the talk is your
- 23. presenting is storytelling www.tudorgirba.com
- 24. story = fairy tale
- 25. design your story
- 27. message message message message message message message message message message message message ssage message message message message message message message message message message message message message message message message message message message essage message message message message
- 28. message message message message message message message message message message message message ssage message message message message message message message message message message message message message message message message message message message essage message message message message
- 29. one message
- 31. slides
- 32. slides are visual aids
- 33. visual slides are aids
- 34. Important sign 1. At this sign, stop, look around and proceed if no other car is coming your way. 2. Important!!!! The cars coming from the other directions will not have to stop. 3. This sign was put here by the authorities in charge. 4. This sign concerns vehicles only. Pedestrians should look at the signs dedicated to them. 5. This sign should not be touched or hindered in any way. Any violation is punishable according to the law.
- 35. STOP
- 36. Important sign • At this sign, stop, look around and proceed if no other car is STOP coming your way. • Important!!!! The cars coming from the other directions will not have to stop. • This sign was put here by the authorities in charge. • This sign concerns vehicles only. Pedestrians should look at the signs dedicated to them. • This sign should not be touched or hindered in any way. Any violation is punishable according to the law.
- 37. effective tailed de Important sign • At this sign, stop, look around and proceed if no other car is STOP coming your way. • Important!!!! The cars coming from the other directions will not have to stop. • This sign was put here by the authorities in charge. • This sign concerns vehicles only. Pedestrians should look at the signs dedicated to them. • This sign should not be touched or hindered in any way. Any violation is punishable according to the law.
- 38. details not all are important
- 40. for sale: baby shoes, never worn Ernest Hemingway
- 41. design is not the abundance of simplicity it is the absence of complexity
- 42. IS emphasizing nothing emphasizing everything
- 43. whitespace
- 53. y x
- 54. y x
- 55. y x
- 56. remove chart junk increase data ink
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- 68. ween bet is in tory the s
- 69. • The more text there is on a slide, the more I will tend to speak it as it is written on the slide. •But, you can read a text much faster than I can speak it. • In such situations, my speech becomes noise as you rather prefer to just go ahead and read it by yourself. • That is the reason why slides should not have text that competes with my speech, but rather be as visual as possible to complement it. • I guess you are already reading this line while I am still somewhere in the middle of the text.
- 70. notes will set you free
- 71. http://www.iwm-kmrc.de/workshops/visualization/sweller.pdf • The more text there is on a slide, the more I will tend http://www.smh.com.au/news/technology/powerpoint-presentations-a-disaster/ to speak it as it is written on the slide. • 2007/04/03/1175366240499.html But, you can read a text much faster than I can speak it. • In such situations, my speech becomes noise as you rather prefer to just go ahead and read it by yourself. • That is the reason why slides should not have text that competes with my speech, but rather be as visual as possible to complement it. • I guess you are already reading this line while I am still somewhere in the middle of the text. One assumption is that slides must also carry the message in the absence of the speaker, and hence most of the content must be on the slides. The result is lots of bullet points and lots of text. However, lots of text competes with the spoken words because we can just read faster than we speak. And we want the audience to hear what we have to notes will set you free say. Another option is to put the text in the notes and provide slides with notes for as printouts.
- 72. if you must write, large fonts use
- 73. trans ition
- 75. visual slides are aids
- 79. “too many minds” The Last Samurai
- 83. en.com logy.com ntationz w.slideo .prese www ww www.tudorgirba.com/blog
- 84. .ted.com www
- 85. what about technical talks?
- 86. facts alone are boring
- 87. any fact has its own story
- 88. content form
- 89. content form
- 92. presenting is storytelling www.tudorgirba.com
- 94. } } { { } } { { g in er ne gi en d ar rw fo
- 95. fo rw ar d en gi ne er in g { { { { { { } { { actual development } } } } } } } } {
- 96. sess u as do yo fo rw how ar em? d syst en your gi ne er in g { { { { { { } { { actual development } } } } } } } } {
- 97. sess u as do yo how em? syst your { { { { } } } } } {
- 98. { { { { complex } = } } } } {
- 99. complex, large { { { { } = } } } } {
- 101. onds, 2 sec line in lines read 1 50‘000 h for 2 if you 1 mont u need yo
- 102. ust is j ode gc adin re ugh eno not
- 103. complex, large { { { { } = } } } } {
- 104. measure query visualize … { { { { } } } } } {
- 105. measure query visualize … { { { { } } } } } {
- 106. metrics summarize the system LOC 148‘760 NOM 14‘915 NOC 2’089 CYCLO 30‘073 CALLS 151287 FANOUT 85909 AHH 0.12 ... ...
- 107. metrics summarize the system LOC 148‘760 NOM 14‘915 NOC 2’089 CYCLO 30‘073 CALLS 151287 FANOUT 85909 AHH 0.12 ... ...
- 108. queries detect outliers God Class: ATFD > FEW & WMC >= VERY HIGH & TCC < 1/3
- 109. pictures tell thousands of words 03 asse 20 uc anza, D L
- 110. pictures tell thousands of words tal 2006 ee Ducass
- 111. pictures tell thousands of words 7 etal 200 Greevy
- 112. pictures tell thousands of words 8 0 ettel 20 W
- 113. pictures tell thousands of words 5 etal 200 Girba
- 114. measure query visualize … { { { { } } } } } {
- 115. e.ch unib se. o mo
- 116. presenting is storytelling www.tudorgirba.com
- 117. Tudor Gîrba www.tudorgirba.com http://creativecommons.org/licenses/by/3.0/