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XP AND CONFIGURATION
    MANAGEMENT: CHICKEN-
    AND-EGG
1
WHAT DO CHICKEN AND EGG HAVE IN
COMMON?




                                  2
NOTHING!


           3
EXCEPT THAT WE DO NOT EXACTLY KNOW
HOW ONE THING EMERGE FROM ANOTHER




                               4
THE SAME APPLIES TO XP AND SCM




                             5
MIRACLE OF THE EVOLUTION



   NO CHICKEN              NO XP WITHOUT
  WITHOUT AN EGG                SCM



                           NO NEED IN SCM
 NO EGG WITHOUT
                             WITHOUT XP
     A CHICKEN
                              PRACTICES
ALL BECAUSE OF EVOLUTION!


                            7
SCM IS ABOUT EVOLUTION OF SOFTWARE
PRODUCT …

Version control

Build & deployment management

Continuous integration

Release management

Database integration

Infrastructure management
                                     8
Dependency management
… WHILE XP DESCRIBES MOST COMMON
SOFTWARE DEVELOPMENT PRACTICES




                                   9
COMPLEXITY OF SOFTWARE
 PRODUCT DEPENDS ON…



                         10
CAUSES OF PROJECT COMPLEXITY


 Requested functionality
 Requested quality
 Number of people on the project
 Their qualification
 Used practices and tools


                                    11
SCM   TOOLS
XP PRACTICES

               12
WHILE PROJECT COMPLEXITY IS CAUSED BY
    ITS GOALS, TOOLS AND PEOPLE…




                                   13
CHICKEN COMPLEXITY IS CAUSED BY ITS
             DESTINY!




                                  14
OBSERVING XP PRACTICES



 Pair programming
 Refactoring
 Test-driven development
 Simple design


                            15
OBSERVING XP PRACTICES



 Continuous integration
 Collective code ownership
 Coding standard
 Metaphor
 Sustainable pace
                              16
OBSERVING XP PRACTICES



 Customer tests
 Planning game
 Small releases
 Whole team

                         17
TOOLS + PRACTICES = (SOFTWARE)
    ENGINEERING PRACTICES




                                 18
SOFTWARE ENGINEERING BEST PRACTICES




                                      19
LET’S TAKE CMMI MODEL AS AN EXAMPLE




                                  20
AMONG ALL THE 22 PROCESS AREAS SCM IS
THE MOST APPLICABLE TO ALL SDLC STAGES




                                   21
IN OTHER WORDS, SCM IS THE BASIC SET OF
 ENGINEERING PRACTICES FOR EFFECTIVE
        SOFTWARE DEVELOPMENT.




                                    22
XP

     SCM

           23
END OF THE SECTION



                     24

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1.1 introduction to scm - xp and cm are chicken-and-egg

Hinweis der Redaktion

  1. Данная презентация направлена на то, чтобы показать взаимосвязь экстремального программирования и конфигурационного менеджмента взяв на вооружение аналогию курицы и яйца. Экстремальное программирование было выбрано не случайно, так как связь между ХР и СМ наиболее крепка.
  2. Что общего между курицей и яйцом?
  3. Ничего
  4. Кроме того, что одно получается из другого совершенно неведомым образом.Всё утро в зеркало яйцо Глядело в зеркало уныло«Так где же начинается лицоИ где кончается затылок?»
  5. То же противоречиеприменимо и к взаимосвязи экстремального программирования и конфигурационного менеджмента
  6. Без яйца курицы не получится, курицы не получится из яйца.Аналогично:Экстремальное программирование не существует без конфигурационного менеджмента, и наоборот – практики конфигурационного менеджмента оказываются совершенно ненужными без практик экстремального программирования.
  7. Всё из-за эволюции.Цель эволюции вообще (согласно братьям Стругацким) – рюмка коньяка с лимономЦель эволюции ПО – работающий программный продукт.
  8. И конфигурационный менеджмент как раз напрямую связан с эволюцией ПО
  9. Тогда как ХР описывает общепринятые практики разработки ПО. Безотносительно эволюции
  10. От чего зависит сложность программного продукта? Наверное, отсоотношения сторон железного треугольника: time, resources, scope. А если детальнее, то от…
  11. Выдвигаемых требований к функциональности (scope)КачествоКоличество людей, занятых на проектеИ их квалификацииИ, что немаловажно, от используемых подходов, инструментов. Другими словами, процессов. А это уже коррелирует со вторым пунктом - качеством.
  12. Scmи XPкак раз призваны помочь в решении проблем, возникающих в больших сложных проектах.Конфигурационныйменеджмент – со стороны инструментов. Тогда как экстремальное программирование – со стороны общепринятых практик.
  13. Продолжая аналогию курицы и яйца… Для любого проекта, будь это fixed cost или time & material важны его бизнес цели, или vision. От этого зависит то, насколько он будет сложным, сколько в нем будет участвовать людей, какие навороченные инструменты будут использоваться. И всё – ради того, чтобы эти бизнес цели были достигнуты. Проект вырастает для того, чтобы быть реализованным и стать достойной частью истории.
  14. Похоже на то, когда вот курица вырастает для того, чтобы быть съеденной!
  15. Давайте рассмотрим то, как практики хр связаны с конфигурационным менеджментом.
  16. Кроме ХР существует большое множество других практик разработки ПО.
  17. Давайте возьмем модель CMMI как пример. Опрос на тему «что такое CMMI?»
  18. УпоминаниеCMвстречается практически в каждой другой процессной области. Это значит, что любой результат деятельности подлежит контролю конфигураций в том, или ином виде. И оказывается что без знания основных принципов управления конфигурациями качественная разработка ПО оказывается невозможной, так как контроль конфигураций применим ко всем этапам жизненного цикла разработки. Конфигурационный менеджмент везде неявно присутствует, хотим мы этого или нет. CMMI модель нам это демонстрирует.
  19. Лучших практик много, можно использовать любую из них как основополагающую. Но лично я утверждаю, что именно конфигурационный менеджмент – это тот самый базовый набор инженерных практик для эффективной и качественной разработки программного обеспечения.
  20. И для того, чтобы проиллюстрироватьэтот аспект, наиболее удачной аналогией для меня показались именно курица и яйцо. Эта аналогия иллюстрирует следующее:СМ чаще всего оказывается недооцененнымПрактики ХР и СМ – взаимозаменяемы и не могут существовать друг без другаПрактики ХР и СМ тесно связаны между собой. ХР и СМ это идеализированные подходы к разработке ПО. ХР и СМ тесно связаны с эволюцией проекта.