Storytelling In Lugano 2009-04-28

www.tudor girba.com Presenting in Lugano Tudor Gîrba www.tudorgirba.com

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

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

www.tudor girba.com Example presentation: Assessing your software systems with better tools Tudor Gîrba - www.tudorgirba.com

www.tudor Roadmap girba.com • Context • Software assessment • Problem • Challenges • Conclusions © Tudor Girba Lugano - April 28, 2009 6

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

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

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

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

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

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

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

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

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

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

why are we here?

not the talk is slides your

story the talk is your

presenting is storytelling www.tudorgirba.com

story = fairy tale

design your story

audience? what is your

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

one message

deliver one message

slides

slides are visual aids

visual slides are aids

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.

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.

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.

details not all are important

omit needless words

for sale: baby shoes, never worn Ernest Hemingway

design is not the abundance of simplicity it is the absence of complexity

IS emphasizing nothing emphasizing everything

whitespace

remove chart junk increase data ink

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not documents slides are

projector = screen

ween bet is in tory the s

• 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.

notes will set you free

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.

if you must write, large fonts use

trans ition

visual slides are aids

aids slides are visual

“too many minds” The Last Samurai

audience = friend

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what about technical talks?

facts alone are boring

any fact has its own story

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Tudor Gîrba www.tudorgirba.com http://creativecommons.org/licenses/by/3.0/

Storytelling In Lugano 2009-04-28

by Tudor Girba on May 06, 2009

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Storytelling In Lugano 2009-04-28 — Presentation Transcript

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