knowledge-base

TL500 DevOps Culture and Practices

• TL500 DevOps Culture and Practices
  • Links
  • Key Takeaways
    • Presentation / Teaching Learnings
    • Interesting Concepts
  • Details
    • Event Storming
    • Metrics Based Process Mapping

TOC created using the yzhang.markdown-all-in-one VS Code extension

Links

• https://rht-labs.com/tech-exercise/slides/
• https://rht-labs.com/tech-exercise/#/1-the-manual-menace/README
• https://github.com/rht-labs/tech-exercise
• https://app.stellafai.com/Space/Visualize/index/9F01BEC2-FF6C-49BC-B435-351AEF39F5BD
• Oguzhans Miro Board

Key Takeaways

• Visualization of work is super useful
  • Information radiators vs
  • Information refrigerators
  • Many practices of the Open Practice Library do this, especially (but not limited to)
    • The Big Picture
    • Target Outcomes
    • Burndown Chart / Burnup Chart
      • analogy: landing aircraft carrier
    • Overview important Practices
  • Why visualize work?
• The right setting is important
  • Expectations Management
    • collect expectations
      • e.g. hopes & fears
  • Social Contract / TL500 Social Contracts
  • psychological safety
  • Stop the World
  • Backlog & Backlog Refinement
  • Parking Lot
  • DoD
  • DoR
  • Team Identity
  • Visualization of Work (see above)
  • Shared understanding is super important (see almost all else)
  • Clarity of Goals & Priorities (see below)
• Clarity of Goals & Priorities is mega important
  • Smart Goals
  • Target Outcomes
  • Impact Mapping
    • Visualize how strategic goals link to the teams work
    • Book “Impact Mapping” by Gojko Adzic
    • TL500 Impact Mapping
  • Priority Sliders / TL500 Priority Slides
  • $100 Prioritisation
  • Impact & Effort Prioritization / Weighted Shortest Job First
• Understanding of requirements and processes is super important
  • Event Storming / TL500 Event Storming
  • Metrics Based Process Mapping / TL500 Metrics Based Process Mapping
  • Empathy Mapping
  • Non-Functional Requirements Map / TL500 Non-Functional Requirements Map
  • User Story Mapping & Value Slicing / TL500 User Story Mapping and Value Slicing
    • tip: directed by Target Outcomes
    • Book: User Story Mapping by Jeff Patton et al.
  • Example Mapping
  • Minimal Viable Product (MVP)
• Feedback is super important
  • Team Sentiment
  • Regular Retrospectives
    • important: react on feedback!
  • Realtime Retrospective
  • Mood Marbles
• Sustainability & Resilience is important
  • Pair Programming
  • Mob Programming / TL500 Pair and Mob Programming
  • Confidence Voting
  • Everything-as-code
  • Visualization / Transparency (see above)
• Lean is about optimizing the flow
  • Metrics Based Process Mapping
  • Kanban / TL500 Kanban
    • Kanban Picture
• Agile is about optimizing feedback loops & adaptability
  • Agile Manifesto
    • 4 Values
    • 12 Principles
  • Metrics Based Process Mapping
  • Scrum / TL-500 Scrum
    • 3-5-3 Formation
    • Iteration (Sprint) Planning
    • Daily Standup
    • Showcase / Sprint Review
    • Retrospectives / TL500 Retrospectives
• General Collaboration Practices
  • Affinity Mapping
  • Confidence Voting
  • Dot Voting
  • TL500 Estimation
    • Relative Sizing
    • Planning Poker
    • T-Shirt Sizes

Presentation / Teaching Learnings

• Plan recaps
  • done by the participants!
  • e.g. Practice Overview
• Icebreakers & “looseners” are super important
  • Ice Breakers
  • some examples:
    • agile faces
    • Sort by Birthday
    • motivating / funny / interesting videos
    • individual / pair / mob drawing (Steven Tyler)
• Keep an eye on the mood!
  • e.g. with feedback techniques from above, but also be mindful
• Optimize communication for audience
  • Involve audience with questions (right amount!)
  • What questions will the audience most likely want to have answered?
  • Right level of explanation detail & special terms

Interesting Concepts

• Dogfooding
• Team Topologies
  • Cognitive Load
• DevOps
  • DevOps Core Competencies
  • The Three Ways of DevOps
    • The DevOps Handbook by Gene Kim, et. al.
      • create delivery system
      • amplify feedback loops
      • learn & experiment continuously
  • Practices: CI, CD^2
• TL500 DDD
• TL500 Test Automation
  • BDD / TL500 BDD
  • TDD / TL500 TDD
    • Lego
    • KISS / YAGNI
• Emerging Architecture
• TL500 UX
  • Empathy Mapping
  • Blue Green Deployments
  • A/B Testing
  • More practices …

Details

Event Storming

• Event Storming / TL500 Event Storming
• Artifacts
  • Big Picture
  • Process Diagram
  • Aggregate Modeling
  • UI Modeling
• Diagram Elements
  • Events
    • orange
    • $subject $verb (past tense)
    • source: system, time, consequence of another event
  • Commands
    • blue
    • action started by an actor
    • represents a decision
  • Actors
    • yellow
    • user of system
  • Read Model
    • green
    • information needed in order to make a decision (data)
  • Questions
    • purple
    • pain points, how / what / why, assumptions …
  • External Systems
    • (also) purple (?)
    • 3rd party services, existing systems
  • Policies & Procedures
    • light purple (?)
    • keywords: always, immediatly, rules, …
  • Aggregates
    • (also) yellow (?)
    • state machine
    • part of a system
    • e.g. service / bounded context / subdomain
    • usually a noun
  • Extras
    • happy / sad path
• Tips for Success
  • don’t loose yourself in discussion!
    • it’s all about communication, not perfection

Metrics Based Process Mapping

• Metrics Based Process Mapping / TL500 Metrics Based Process Mapping
• related to Value Stream Mapping
• Book: Accelerate (Nicole Forsgen et al.)
• Recommended Metrics of Velocity
  • Frequency of deployments
  • Lead time new features
  • Frequency of change failures
  • Mean-time-to-repair / MTTR
• Flow Metrics
  • Throughput
  • WIP
  • Cycle Time
  • Work Item Age
• Activity Card
  • Step Name
  • Number of people & Flow barriers
  • Percentage complete & accurate
  • Process Time (PT) & Lead Time (LT)
• Define the Timeline Critical Path
• it’s good for presentation & convincing
  • TL500 Example
  • current way
  • new way
  • improvement
• Facilitation Tips