Building in quality

During the talk Jakub will remind about the importance of building the quality into an application from the very beginning. Agile methodologies are very popular these days. Writing user stories with acceptance criteria, standups and other agile ceremonies are nothing new to most of us. Going one step further and automating the acceptance criteria with tools like Cucumber, JBehave or Behat, improves the external quality of software, by focusing the development on the business goals. On the other hand, unit level tools aim to ensure the inner quality of code and support the developer, but seem to be totally worthless from the client’s perspective. Besides, how do we make sure that we’re building the right thing? How do we get satisfying acceptance criteria? How do we keep the business engaged?

Transcript

1. Building in quality Jakub Zalas 7th of April 2014
2. @jakzal @jakub_zalas @SensioLabsUK £  
3. QUALITY? What is
4. Quality is really two levers: external and internal quality. External quality is the quality perceived by the customer. [Internal quality is] Quality of internals of the system: how well it is designed, how good the internal tests are, and so on.
5. How would you define software quality? @jakub_zalas
6. the extent to what the software takes into account what matters most for the customer & the maintainability of the source code @_md External quality Internal quality
7. software quality? That the software delivers real value and is built in a sustainable way. @IanDominey External quality Internal quality
8. MORE IMPORTANT? What is
9. Ignoring the external quality
10. Ignoring the internal quality
11. INTERNAL QUALITY
12. SHOULD WE CARE?
13. Ignoring the internal quality
    Care No care Time # of features
14. Ignoring the internal quality Time Pace Care   No  care   Care   No  care  
15. IS OUR PROFESSIONAL RESPONSIBILITY Ensuring the internal quality
16. CONTINUOUSLY REVIEW THE DESIGN To MAINTAIN the internal quality
17. REFACTOR To MAINTAIN the internal quality
18. TESTS There’s no refactoring without
19. IS OUR PROFESSIONAL RESPONSIBILITY Writing tests
20. DESIGN WELL To BUILD the internal quality
21. DRIVE YOUR CODE WITH TESTS To BUILD the internal quality
22. WE LEARN HOW TO KEEP THE DESIGN SIMPLE Writing tests FIRST
23. IS OUR PROFESSIONAL RESPONSIBILITY Writing tests FIRST
24. IS ALL ABOUT TDD Building the quality into our app
25. EXTERNAL QUALITY
26. BDUF
27. Requirements Design Implementation Verification Maintenance
28. GET IT RIGHT FROM THE START
29. WHEN IS IT YOU KNOW THE LEAST ABOUT YOUR PROJECT?
30. WE LEARN DURING THE IMPLEMENTATION
31. AGILE TO THE RESCUE!
32. SCRUM
33. WATERFALL
34. WATERSCRUMFALL
35. "I need users to log into the site to track their delivery." Mr Client
36. As a User I need to log into the site So I could track my delivery
37. As a User I need to see my deliveries So I could know when it's going to be delivered
38. CLIENT CAME WITH A SOLUTION
39. WHAT'S THE GOAL?
40. 5 WHYS
41. "I need users to log into the site to track their delivery." "Why?" "So they could see where's their package." "Why?" "What do you mean? They need to track their deliveries." "Yes, but why?"
42. "Well, our mission is to offer the most customer friendly courier services. We want to increase the number of satisfied customers." "Aha!" "So they wouldn't get impatient and file complaints when the delivery is delayed." "Why?" "So they could know when is it going to be delivered." "Why?"
43. THE GOAL!
44. < 5% of customers filing complaints Customers   Support   Notifications Contact the Customer if delivery is delayed Add expected delivery time to the confirmation message SMS notifications Add a tracking URL to the confirmation message E-mail notifications List of deliveries after logging in Prevent complaints Check delivery status Why? Who? How? What?
45. MAKE IMPACTS NOT SOFTWARE Gojko Adžić impactmapping.org
46. EXAMPLE WORKSHOP
47. Feature: Tracking deliveries As a Customer I need to see a status of my delivery So I could know when it's going to be delivered Scenario: Clicking a tracking URL Given I am waiting for a delivery And I received a confirmation message When I click the tracking URL from the message Then I should see a status of my delivery Scenario: Clicking a tracking URL month after delivery Given I my package was delivered a month ago And I kept the confirmation message When I click the tracking URL from the message Then I should be informed the tracking URL has expired
48. LET'S CODE
49. Failing   step   Failing   test   Code   Refactor   Passing   step   External Internal
50. THANK YOU!
51. Credits •  http://www.rgbstock.com/photo/mfXiaE4/Angry+Sumo •  http://www.nightmarefactory.com/cgi-bin/shopper?preadd=action&key=RU909885