The presentation gives high-level overview of most important aspects of implementing Continuous Delivery comparing CD with Agile, DevOps and Lean software development.

1. State of Continuous Delivery
in 2015
Pavel Chunyayev
Minsk, 15-5-2015

2. Our common goal
• Give customer what they want
• When they want
• At the lowest costs possible
• Quickly, cheaply and reliably implement ideas for customers and
receive feedback.

3. One in six IT projects have an average cost overrun of 200% and a
schedule overrun of 70%. (Harvard Business Review, 2011)
75% of business and IT executives anticipate their software projects will
fail. (Geneca, 2011)
Fewer than a third of all projects were successfully completed on time
and on budget over the past year. (Standish Group, 2013)

4. Software delivery process
Design Develop Test Operate

5. Last mile problem
• Streamlined value delivery from left to right
• We need to remove the wall of separation between development/QA
and Production.
OperateLast mile

6. Unreleased changes = Waste
Released changes = Value

7. Our highest priority is to satisfy the
customer through early and
continuous delivery
of valuable software.
The Agile Manifesto

8. Continuous Delivery overview
Inception
•Business idea
•Needed immediately
•Should generate
money
Plan
•Create user stories
•Prioritize
•Refined
•Estimated
Develop
•Scrum sprints
•Create branch
•Develop
•Code review
Integrate
•Commit
•Trigger pipeline
•Build
•Unit testing
•Integration testing
Testing
•Journey across
environments
•Acceptance
•Capacity
•Security
•Manual/exploratory
Release
•Automated
•Push-button
•Zero-downtime
•Canary
Operate
•Monitoring
•Validation
•Money generation
•Disposal

9. Principles of CD
• Create repeatable and reliable process for releasing software
• Keep everything in the source control
• Automate (almost) everything
• Build quality in
• Redefine ‘Done’ to mean released
• Make everybody responsible for the release process
• Implement continuous improvements

10. Repeatable and reliable process

11. Everything in the source control

12. Automate (almost) everything

13. Build quality in

14. ‘Done’ means released

15. Everybody is responsible for the
release process

16. Implement continuous
improvements

17. Principles of CD
• Create repeatable and reliable process for releasing software
• Keep everything in the source control
• Automate (almost) everything
• Build quality in
• Redefine ‘Done’ to mean released
• Make everybody responsible for the release process
• Implement continuous improvements

18. Continuous Delivery vs
Continuous Deployment
• Possibility to aggregate changes in preproduction
• Possibility to deploy every change/commit

19. Quality > Speed

20. CD != Tools
CD != CI++

21. CD = modern application lifecycle
management

22. CD = Changing the way we deliver
IT services (software) to our users

23. How long would it take your
organization to deploy a change that
involves just one single line of code?

24. Do you do this on a repeatable,
reliable basis?

25. Does each deployment pass
through the same stages?

26. How to start?
• Agile development
• Continuous Integration
• Infrastructure automation
• Automated testing
• Automated deployments
• Shared tools and procedures
• Shared goals and communication

27. Agile
Inception Plan Develop Integrate Testing Release Operate
Agile

28. CD builds up on Agile

29. Agile is the best approach to
develop software

30. CD is the best approach to deliver
software

31. Inception Plan Develop Integrate Testing Release Operate
Agile

32. DevOps
Inception Plan Develop Integrate Testing Release Operate
DevOps

33. DevOps - Unified IT, synchronized
technically and highly
collaborative

34. Continuous Delivery – What
DevOps - How

35. Conway’s law
Organizations which design systems ... are constrained to produce
designs which are copies of the communication structures of these
organizations.
—Melvin Conway
If the architecture of the system and the architecture of the
organization are at odds, the architecture of the organization wins.
—Ruth Malan

36. Build teams that look like the
architecture you want

37. CALMS
Culture
Automation
Lean
Measurement
Sharing

38. Automate!
• Build
• DB schema changes
• Tests
• Infrastructure
• Deployments
• Monitoring

39. Release != deployment

40. Deployment = boring repeatable
Release = marketing

41. CD pipeline = process model

42. Process perspective
• Workflow
• Each step – repeatable
• No defects go further
• No local optimizations that degrade overall performance
• Increase the flow, analyze and optimize
• Reduce the batch size
• Improve at the bottleneck
Inception Plan Develop Integrate Testing Release Operate

43. Lean
Inception Plan Develop Integrate Testing Release Operate
Lean

44. Lean software development
• Deliver as fast as possible
• Build quality in
• Optimize for the whole
• Eliminate waste
• Amplify learning
• Decide as late as possible
• Empower the team

45. Waste
• Inventory (work waiting)
• Defects
• Handovers
• Manual setups
• Manual tests
• Manual deployments
• Slow internal communication

46. Most delay in product
development is a wait time

47. Shorten cycle time
• Waterfall – months
• Agile (Iterative development) – weeks
• Kanban – days
• CD - hours

48. Quickly validate business ideas

49. Lean startup/enterprise
1. Make a guess based on experience and observation.
2. Propose an explanation - hypothesis.
3. Make a prediction from the hypothesis.
4. Test the prediction.
5. Repeat!

50. The most important skill to
master?

51. The ability to improve

52. Yesterday’s best practice is
tomorrow’s anti-pattern

53. Overview
Inception Plan Develop Integrate Testing Release Operate
Lean
DevOps
Agile

54. Some big shifts happening
• Testing in production
• Microservices
• Containers/Cloud
• Role of QA/System administrator

55. Key takeaways
• Create repeatable and reliable process
for releasing software
• Automate (almost) everything
• Build quality in
• Reduce the batch size
• Improve continuously :)
pavel@levi9.com
@PavelChunyayev
Any questions?