Bdd and Scrum Team Dynamics
•
19 likes•4,168 views
Behaviour Driven Development (BDD) is an approach than encourages teams and stakeholders in general to reason about requirements in terms of “executable specifications”, and focus on implementing features with demonstrable business value. BDD is more than just a development technique: in fact, it introduces a whole new dynamic to interactions between team members and stakeholders, a dynamic that increases communication, improves productivity and reduces waste. Through ongoing conversations between business stakeholders and team members, a team applying BDD principles will explore the business goals, capabilities and behaviour that the stakeholders need. They then propose features that the system will need to deliver these capabilities, and use concrete examples and counter-examples to explore and understand these features more fully. In this talk, you will learn about the principles and benefits of BDD for the whole team, how BDD works in practice, and how it affects the various team members in a project. Finally, you will discover the relationship between behavior driven development and automated acceptance testing.
Bdd and Scrum Team Dynamics
- 1. Using Behaviour Driven Development to Enhance Scrum Team Dynamics John Ferguson Smart
- 2. Consulta nt Trainer Mentor Author Speaker Coder John Fer guson S mar t
- 3. There are only two problems in software development 1) Building the software wrong 2) Building the wrong software
- 4. 50-‐80% of produc.on code is never or rarely used
- 5. Poor quality costs money!
- 6. Payroll System Ini:al Budget $6 million Cost by 2012 $416 million Es:mated cost to complete $837 million
- 8. Project success = right product + built right
- 9. Building the right thing Features aligned to business needs Right product, built right Wasted effort Doesn't do wha the use t r wants What e Project lat Hard to change Over bu sive to dget aintain le Unstab Expen Misaligned m requirements Building the thing right How Poor craftsmanship Quality Bugs craftsmanship
- 10. BDD The Drive for Value
- 11. Behaviour Driven Development is... Conversation Focused
- 12. Behaviour Driven Development is... Example-based
- 13. Behaviour Driven Development is... i o n u m pt A s s
- 14. Behaviour Driven Development is... Value Driven
- 15. Behaviour Driven Development is... Ou ts id e In
- 16. Behaviour Driven Development is... Business Analyst A Common Language Business Developer Tester
- 17. Behaviour Driven Development is... Executable Specifications
- 18. Behaviour Driven Development is... 31% faster delivery Delivery Time Tradi.onal Using BDD More value faster
- 19. Behaviour Driven Development is... 4 .mes less defects Defect Rate Tradi.onal Using BDD Higher Quality
- 21. I want to sell train 5cket bookings online OK. How will that benefit you?
- 22. Travellers won’t have to waste 8me queuing at the sta8on any more So you might say: Yes In order to save ,me by avoiding the queue at the sta,on As a traveller I want to book my ,cket online
- 23. So why do we care? People hate queueing. More Aha! So it’s about selling people will buy train 8ckets if they don't more 8ckets! have to queue. Yes
- 24. So we could say this: In order to increase ,cket sales I guess so As a rail service I want travellers to be able to save ,me by booking online
- 25. Can you give me an example of how someone might book a train 8cket online? Sure. A traveller buys a 8cket online from Dubbo to Sydney. Which would cost? $25 So we could say: Given Jane wants to take a train from Dubbo to Sydney When she books a ,cket online Then she should be charged $25
- 26. Hmm. So every traveller pays the same price? Of course not! A pensionner would only pay $20, for example. Ok. So let’s add that example too: Given Joe wants to take a train from Dubbo to Sydney And Joe has a pension card When he books a ,cket online Then he should be charged $20 And he should be issued with a valid ,cket
- 27. Can you give me any other examples of people who don’t pay $25 for this trip? Yes, we give students a 30% discount Let’s put this in a table Trip base cost Concession type Expected Price $25 Pensioner $20 $25 Military $20 $25 Student $17.50 $25 Under 12 $12.50 $25 Under 3 $0.00
- 28. So what did we just do?
- 29. I want to sell train 5cket bookings online 1) Identify a feature
- 30. I want to sell train 5cket bookings online To increase 5cket sales 2) Understand why
- 31. I want to sell train 5cket bookings online To increase 5cket sales 3) Find examples Given Jane wants to take a train from Dubbo to Sydney When she books a ,cket online Then she should be charged $25
- 32. I want to sell train 5cket bookings online To increase 5cket sales 4) Challenge assumptions Given Jane wants to take a train from Dubbo to Sydney When she books a ,cket online Then she should be charged $25 Given Joe wants to take a train from Dubbo to Sydney And Joe has a pension card When he books a ,cket online Then he should be charged $20 And he should be issued with a valid ,cket
- 33. I want to sell train 5cket bookings online To increase 5cket sales 5) Extend our model Given Jane wants to take a train from Dubbo to Sydney When she books a ,cket online Trip base cost Concession type should Expected Price Then she be charged $25 $25 Pensioner $20 Given Joe wants to take a train from Dubbo to Sydney $25 Military $20 And Joe has a pension card $25 Studente books a ,cket online When h $17.50 $25 Underh12 hould be charged $20 Then e s $12.50 And he should be issued with a valid ,cket $25 Under 3 $0.00
- 34. And now we can automate
- 35. Now we can automate the acceptance criteria Trip base cost Concession type Expected Price $25 Pensioner $20 $25 Military $20 $25 Student $17.50 $25 Under 12 $12.50 $25 Under 3 $0.00 Acceptance criteria
- 36. Now we can automate the acceptance criteria Trip base cost Concession type Expected Price $25 Pensioner $20 $25 Military $20 $25 Student $17.50 $25 Under 12 $12.50 $25 Under 3 $0.00 Automated acceptance criteria
- 37. Now we can automate the acceptance criteria Trip base cost Concession type Expected Price $25 Pensioner $20 $25 Military $20 $25 Student $17.50 $25 Under 12 $12.50 $25 Under 3 $0.00 Living Documentation
- 38. BDD also applies to coding
- 39. We are always writing the specifications for something
- 40. Low level specifications Also act as technical documentation
- 41. High Level BDD What features should we build? Automated acceptance criteria Written for the whole team Spock Low Level BDD How do we build them? Low level specification and design Written for developers
- 42. BDD and the Product Backlog A story of focus
- 43. What should we build next?
- 44. Backlog Next Sprint ?
- 45. Backlog Next Sprint ? $$$$$$$ $$$$$$$ $$$$$$ $$$$$ $$$$ $$$ $$$ $$$ $$$ $$$
- 46. But what about Minimum Marketable Features?
- 47. Backlog Next Sprint { ? Minimum $$$$$$$ Marketable Feature 1 $$$$$$$ $$$$$$ $$$$$ { Minimum $$$$ Marketable Feature 2 $$$ $$$ $$$ $$$ $$$
- 48. Minimum Marketable Features or Minimum Viable Product?
- 49. How long would it take you to rewrite your last project?
- 50. “Ignorance is the constraint” - Liz Keogh
- 51. "Ignorance more frequently begets confidence than does knowledge" - Charles Darwin
- 52. Software development is a process of Continual Incremental Learning Known Unknowns Unknown Unknowns
- 53. "Scientia potentia est" Knowledge is power - Sir Francis Bacon
- 54. Learning has value What stories will reduce our ignorance the most?
- 55. Backlog Next Sprint ? $$$$$$$ $$$$$$$ $$$$$$ $$$$$ $$$$ $$$ $$$ $$$ $$$ $$$
- 56. Backlog Next Sprint ? ??????? ??????? ?????? ????? ???? ??? ??? ??? ?? ?
- 57. Hunt the value!
- 58. What do you want to achieve? Vision What will the business get out of it? Goals What do users and stakeholders need to deliver these goals? Capabilities How can our application help the users to do this? We can break a Features feature up into stories Stories Concrete examples are easier to understand Scenarios Are we there yet? Acceptance Criteria Code
- 59. A business goal should 1) Increase Revenue 2) Reduce Costs 3) Protect Revenue 4) Avoid future costs
- 60. But who knows what the real goals are? Chances of knowing Senior Management Product Owners Scrum Masters Business Analysts Testers Developers Role in the organiza8on
- 61. Every story will provide value to the business What makes you so sure?
- 62. Can you map each story back to a business goal?
- 63. Requirements analysis is built on assumptions Goal ti on To increase 8cket sale su mp revenue As ti on u mp ss Capability Sell 8ckets online A “Selling tickets online will increase sales” Feature Pay by any credit card “More credit card support will increase online sales”
- 64. How can you validate your assumptions? Goal ti on To increase 8cket sale su mp revenue As ti on Text u mp ss Capability Sell 8ckets online A “Selling tickets online will increase sales” Feature Pay by any credit card “More credit card support will increase online sales” ...by measuring the outcomes
- 65. Impact Mapping a visual approach to identifying assumptions Why Who How What concessions online booking To increase travellers take the train credit card ticket sale more often payment revenue suggest taking social network the train to integration friends
- 66. 1) Iden.fy your assump.ons 2) Measure the outcomes 3) Verify your assump.ons
- 67. BDD and team dynamics Collaboration like you mean it
- 68. How do you build a feature? Story WASTE bug reports Working code boring manual tes5ng
- 69. How do you build a feature? Story Examples Automated acceptance Shared criteria understanding Working code and Working Automated Acceptance Tests Exploratory tes5ng, usability tes5ng...
- 70. Tips and tricks When the rubber hits the road
- 71. 71
- 72. 72 "Don't tell people how to do things, tell them what to do and let them surprise you with their results" - George S. Patton
- 73. 73
- 74. 74
- 76. 76 You are allowed to ask ques.ons