Dealing with Software Development

trying to understand software development, before entering the agile grounds to deal effectively with software

OIPD Conference Telefonica O2 UK 2011

Transcript

1. Dealing  with  So.ware  Development  
   Ruben  Gonzalez  Blanco  
   rubenb@;d.es  
   Telefonica  Digital    
   Product  Development  and  Innova;on  
   By  being  aware  of  so.ware  
   

   View Slide

2. Agenda  
   1.  Raising  Awareness  
   2.  Understanding  So.ware  Development  
   3.  Dealing  Effec;vely  with  So.ware  
   Following   are   a   set   of   personal   opinions   and   understandings   about  
   so.ware   development   and   so.ware     engineering   profession.   The  
   purpose  of  this  presenta;on  is  just  sharing  those  not  convincing  you  
   or  changing  your  mind.  
   DISCLAIMER  
   

   View Slide

3. 1.  Raising  Awareness  
   A  view  about  so.ware  that  many  
   have  forgoPen  
   

   View Slide

4. Dealing  with  So.ware.  Evolu;on  
   So.ware  Crisis  
   So#ware  Engineering  
   No  Silver  Bullet  
   Agile  Manifesto  
   Cra#smanship  
   Manifesto  
   Cra.ing  
   Incremental  
   1960   1970   1980  
   1950   1990   2000   2010  
   Waterfall  
   Itera;ve  
   Rapid  Prototyping  
   CMM  
   Cra.ing  
   Predic;ve  Processes  
   Itera;ve  Processes  
   Agile  Methods  
   Scrum,  XP,  FDD,  DSDM,  OpenUP…  
   Spiral,  RAD,  Objectory,    RUP  
   Waterfall,  CMM,  ISO9000  
   Evolu;onary  
   

   View Slide

5. So.ware  Development  Cliché  
   

   View Slide

6. Dennis  the  So.ware  Developer  
   

   View Slide

7. Observing  Dennis  coding  
   Problem  &    
   Coding  Idea  
   Code  
   Run  &  Test  
   Outcome  
   Programmer  
   

   View Slide

8. Leonard  the  Ar;st  
   

   View Slide

9. Observing  Leonard  pain;ng  
   Scene  &  
   Pain;ng  Idea  
   Paint    
   Review    
   Outcome  
   Painter  
   

   View Slide

10. Humm…Find  the  Differences  
    Problem  &    
    Coding  Idea  
    Code  
    Run  &  Test  
    Outcome  
    Programmer  
    Scene  &  
    Pain;ng  Idea  
    Paint    
    Review    
    Outcome  
    Painter  
    

    View Slide

11. The  Ar;st  con;nuous  flow  
    Inten;on   Realiza;on  
    Feedback  
    Synthesis  
    

    View Slide

12. The  Ar;st  con;nuous  flow  
    Inten;on   Realiza;on  
    Feedback  
    Synthesis  
    The  SW  Developer  
    

    View Slide

13. The  Ar;st  aPributes  
    Knowledge    
    Mastery  
    Talent  
    Mo;va;on    
    Crea;vity  
    Inspira;on  
    Passion  
    Genius  
    

    View Slide

14. The  Ar;st  aPributes  
    Knowledge    
    Mastery  
    Talent  
    Mo;va;on    
    Crea;vity  
    Inspira;on  
    Passion  
    Genius  
    The  SW  Developer  
    

    View Slide

15. Art  vs  pure  Engineering  
    Human  
    Unpredictable    
    Prac;ces  
    Tacit  
    Planned  
    Process  
    Explicit  
    VS  
    Industrial  
    

    View Slide

16. Art  vs  pure  Engineering  
    Human  
    Unpredictable    
    Prac;ces  
    Tacit  
    Planned  
    Process  
    Explicit  
    VS  
    Industrial  
    So.ware  Development  
    

    View Slide

17. Cra.ing  or  Engineering?  
    So.ware   Development   seems   to   be   closer   to  
    Cra.ing   and   Ar;s;c   work   rather   than   pure  
    Engineering  work….    
    …but  some  good  prac;ces  of  Engineering  
    disciplines  can  s;ll  be  applied.  
    

    View Slide

18. Cra.  or  Art?    
    Just  a  maPer  of  genius  and  talent  
    So.ware  code  wriPen  by    humans  can  have  “beauty”  in  the  way  is  wriPen,  run,  
    structured  and  how  collaborate/  interact  between  its  parts  
    

    View Slide

19. 2.  What  it  is  So.ware  and  
    So.ware  Development?  
    A  prac;;oner  view  
    

    View Slide

20. So.ware  Development  is  a  process  of  
    con;nuous  Knowledge  Transforma;on  
    Crea;ve   Human  
    

    View Slide

21. Knowledge  about  a  Problem  and  a  
    possible  Solu;on  
    Problem   Solu;on  
    

    View Slide

22. Based  on  Con;nuous  Synthesis  
    What  
    Human  
    Knowledge  
    transforma;on  
    How  
    Source  
    Code  
    Executable    
    SW  
    knowledge  
    Time  
    Learning  by  doing  
    

    View Slide

23. Both  Itera;ve  and  Incremental  
    Itera;mental  
    •  To  find  out  “what”  and  “how”  
    •  To  improve  the  System  
    •  To  release  func;onality  incrementally  
    •  To  gradually  add  parts  to  the  System  when  “what”  and  “how”  are  known  
    From  Jeff  PaPon  :  hPp://www.agileproductdesign.com/blog/dont_know_what_i_want.html  
    ITERATIVE  
    INCREMENTAL  
    

    View Slide

24. So.ware  emerges  and  grows  
    con;nuously  along  the  process  of  
    crea;on  (itera;ve  +  incremental)  
    System  “Specs”  
    Architecture  
    So#ware  System  
    Emergence  is  the  key  characteris;c  of  complex  systems.    
    Idea  
    Need  
    Problem  
    Inten;onal  
    Emergent  
    

    View Slide

25. Requires  Understanding  “What”  and  
    “How”  at  mul;ple  levels  of  detail  
    What  
    How  
    What  
    How  
    What  
    How  
    User  
     System  
    Component  
    What  
    How  
    What  
    How  
    What  
    How  
     Domain  
    Team  
    Individuals  
    MulCple  Levels  
    of  IteraCmental  
    Cycles  
     MulCple  
    Disciplines  
    

    View Slide

26. So.ware  Developers  work  at  the  
    highest  level  of  detail  and  complexity  
    Problem  
    Technical  SoluCon  
    User  Space  
    Level  of  Detail  
    So.ware  Space  
    Developers  
    work  here  
    

    View Slide

27. So.ware  Developers  are  Essen;al  
    They  do  the  most  complex  and  relevant  task  :    
     
    Transforming  Knowledge  into  Code  
    Source    
    Code  
    Executable    
    SW  
    

    View Slide

28. So.ware  is  a  form  of  Knowledge  
    Source  
    Code  
    Executable  
     SW  
    What  
    How  
    Problem   Solu;on  
    

    View Slide

29. 3.  Dealing  effec;vely  with  So.ware  
    Pieces  of  advice  to  understand  agile  
    and  so.ware  cra.ing  prac;ces  
    

    View Slide

30. Work  in  small  Short  Steps    
    •  Each  Cycle  Delivering  “Working”  So.ware  
    –  Measure  of  Progress  =  Working  So.ware  
    •  Each  Cycle  Embraces  the  Change  naturally  
    Inten;on  
    Working  So.ware  
    IT1   IT2  
    Feedback    
    Team  Cycles  or  Sprints  (1-­‐4  weeks)  
    Value  
    Driven  
    Synthesis  
    •  New  Features  
    •  Changes  
    •  Enhancements  
    Adapt  
    IT3  
    •  New  Features  
    •  Changes  
    •  Enhancements  
    Feedback    
    Adapt  
    Feedback    
    Adapt  
    Incremental  +  Itera;ve  Development  Cycles  =  IteraCmental  Cycles  
    Individuals  Cycles  (minutes,  hours,  day)  
    

    View Slide

31. Be  Value  Driven  
    SOURCE  :  DSDM  
    BasedFrom  Dean  Leffingwell  
    Fixed  
    Scope  
    Time  
    Resources  
    Time  
    Scope  
    Plan    
    Driven  
    Value  
    Driven  
    The  Plan  creates  cost/
    schedule  es1mates  
    feature  intent  &  commitment  to  
    deliver  the  max  value  
    Resources  
    Fixed  
    EsCmated   IntenConal  &  
    Max  Possible  
    

    View Slide

32. Grow-­‐Emerge  the  system  
    •  From  Idea  to  Realiza;on  based  on  con;nuous  
    synthesis-­‐feedback  and  adaptaCon  
    

    View Slide

33. Avoid  BUFs  
    •  Make  your  Design  and  Specifica;on  Emerge  
    – Plans,  Es;ma;ons  and  Designs  must  be  IntenConal  
    Big  Up  Front  Designs,  Specifica;ons,  Plans…  
     
    

    View Slide

34. Have  Customers  in  the  Team  
    

    View Slide

35. Blend  a  Mul;ple  Disciplines  in  a  Team  
    Collabora;ng  together  
    Domain  Experts  
    Ux  Designers  
    Business  Analysts  
    Product  Managers  
    Developers  
    Testers  
    System  Engineers  
    Deployment  Engineers  
    Architects  
    Human  Factors  
    Users  
    Foster  Open  Communica;ons  and  Collabora;ons  
    

    View Slide

36. Have  a  Crea;ve  Environment  
    Foster  and  aPract  Crea;ve  minds  
    

    View Slide

37. Have  the  Condi;ons  that  Inspire  Crea;vity    
    Crea;vity  needs  both  the  “connected  mind”  and  the  “crea;ve  pauses”  
    

    View Slide

38. Do  not  set  Goals,  create  Challenges  
    give  Direc;ons  
    Facilitate,  Support  and  Help    
    

    View Slide

39. Simplify  Essen;al  Complexity  
    Diminish  Accidental  Complexity*  
    EssenCal  complexity  is  caused  by  the  problem  to  be  solved,  and  nothing  can  
    remove  it.  Represents  the  difficulty  inherent  in  any  problem.  
    Accidental  complexity  grows  from  the  things  we  feel  we  must  build  to  
    mi;gate  essen;al  complexity.  Relates  to  problems  that  we  create  on  our  
    own  and  which  can  be  fixed.  
    *By  Neal  Ford  in  “97  things  every  architect  should  know”.    
    

    View Slide

40. Adapt  Methods  to  the  Team  
    Not  the  opposite  
    DSDM  
    FDD  
     
    Remember:  There  is  No  Silver  Bullet….  Fred  Brooks  
    Crystal  
    Pragma;c  Programming  
    Adap;ve  So.ware  Development  
    

    View Slide

41. Treat  So.ware  Code  as  an  Asset  
    

    View Slide

42. Have  a  Team  of  Talented  Individuals    
    inspired   crea;ve  
    passionate  
    team  player  
    

    View Slide

43. Conclusion  
    BE  SOFT-­‐AWARE  
    hPp://agilemanifesto.org/  
    hPp://manifesto.so.warecra.smanship.org/  
    

    View Slide

44. Agile  Manifesto  
    We  are  uncovering  bePer  ways  of  developing  so.ware  by  doing  it  and  helping  others  do  it.  
    Through  this  work  we  have  come  to  value:  
     
    Individuals  and  interacCons  over  processes  and  tools  
     
    Working  so#ware  over  comprehensive  documenta;on  
     
    Customer  collaboraCon  over  contract  nego;a;on  
     
    Responding  to  change  over  following  a  plan  
     
    That  is,  while  there  is  value  in  the  items  on  the  right,  we  value  the  items  on  the  le.  more  
    hPp://agilemanifesto.org/  
    

    View Slide

45. Cra.smanship  Manifesto  
    As   aspiring   So.ware   Cra.smen   we   are   raising   the   bar   of   professional   so.ware     development   by  
    prac;cing  it  and  helping  others  learn  the  cra..    Through  this  work  we  have  come  to  value:  
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
    That  is,  in  pursuit  of  the  items  on  the  le.  we  have  found  the  items  on  the  right  to  be  indispensable.  
    Not  only  working  so.ware,  
     but  also  well-­‐cra#ed  so#ware  
     
    Not  only  responding  to  change,  
     but  also  steadily  adding  value  
     
    Not  only  individuals  and  interac;ons,  
     but  also  a  community  of  professionals  
     
    Not  only  customer  collabora;on,    
    but  also  producCve  partnerships  
    hPp://manifesto.so.warecra.smanship.org/  
    

    View Slide