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Scrum Master Expert

Domain: Project Management | Skill: scrum-master | Source: project-management/scrum-master/SKILL.md

Scrum Master Expert

Data-driven Scrum Master skill combining sprint analytics, probabilistic forecasting, and team development coaching. The unique value is in the three Python analysis scripts and their workflows — refer to references/ and assets/ for deeper framework detail.

Table of Contents

Analysis Tools & Usage

1. Velocity Analyzer (scripts/velocity_analyzer.py)

Runs rolling averages, linear-regression trend detection, and Monte Carlo simulation over sprint history.

# Text report
python velocity_analyzer.py sprint_data.json --format text

# JSON output for downstream processing
python velocity_analyzer.py sprint_data.json --format json > analysis.json

Outputs: velocity trend (improving/stable/declining), coefficient of variation, 6-sprint Monte Carlo forecast at 50 / 70 / 85 / 95% confidence intervals, anomaly flags with root-cause suggestions.

Validation: If fewer than 3 sprints are present in the input, stop and prompt the user: "Velocity analysis needs at least 3 sprints. Please provide additional sprint data." 6+ sprints are recommended for statistically significant Monte Carlo results.

2. Sprint Health Scorer (scripts/sprint_health_scorer.py)

Scores team health across 6 weighted dimensions, producing an overall 0–100 grade.

Dimension Weight Target
Commitment Reliability 25% >85% sprint goals met
Scope Stability 20% <15% mid-sprint changes
Blocker Resolution 15% <3 days average
Ceremony Engagement 15% >90% participation
Story Completion Distribution 15% High ratio of fully done stories
Velocity Predictability 10% CV <20% 
python sprint_health_scorer.py sprint_data.json --format text

Outputs: overall health score + grade, per-dimension scores with recommendations, sprint-over-sprint trend, intervention priority matrix.

Validation: Requires 2+ sprints with ceremony and story-completion data. If data is missing, report which dimensions cannot be scored and ask the user to supply the gaps.

3. Retrospective Analyzer (scripts/retrospective_analyzer.py)

Tracks action-item completion, recurring themes, sentiment trends, and team maturity progression.

python retrospective_analyzer.py sprint_data.json --format text

Outputs: action-item completion rate by priority/owner, recurring-theme persistence scores, team maturity level (forming/storming/norming/performing), improvement-velocity trend.

Validation: Requires 3+ retrospectives with action-item tracking. With fewer, note the limitation and offer partial theme analysis only.

Input Requirements

All scripts accept JSON following the schema in assets/sample_sprint_data.json:

{
  "team_info": { "name": "string", "size": "number", "scrum_master": "string" },
  "sprints": [
    {
      "sprint_number": "number",
      "planned_points": "number",
      "completed_points": "number",
      "stories": [...],
      "blockers": [...],
      "ceremonies": {...}
    }
  ],
  "retrospectives": [
    {
      "sprint_number": "number",
      "went_well": ["string"],
      "to_improve": ["string"],
      "action_items": [...]
    }
  ]
}

Jira and similar tools can export sprint data; map exported fields to this schema before running the scripts. See assets/sample_sprint_data.json for a complete 6-sprint example and assets/expected_output.json for corresponding expected results (velocity avg 20.2 pts, CV 12.7%, health score 78.3/100, action-item completion 46.7%).

Sprint Execution Workflows

Sprint Planning

  1. Run velocity analysis: python velocity_analyzer.py sprint_data.json --format text
  2. Use the 70% confidence interval as the recommended commitment ceiling for the sprint backlog.
  3. Review the health scorer's Commitment Reliability and Scope Stability scores to calibrate negotiation with the Product Owner.
  4. If Monte Carlo output shows high volatility (CV >20%), surface this to stakeholders with range estimates rather than single-point forecasts.
  5. Document capacity assumptions (leave, dependencies) for retrospective comparison.

Daily Standup

  1. Track participation and help-seeking patterns — feed ceremony data into sprint_health_scorer.py at sprint end.
  2. Log each blocker with date opened; resolution time feeds the Blocker Resolution dimension.
  3. If a blocker is unresolved after 2 days, escalate proactively and note in sprint data.

Sprint Review

  1. Present velocity trend and health score alongside the demo to give stakeholders delivery context.
  2. Capture scope-change requests raised during review; record as scope-change events in sprint data for next scoring cycle.

Sprint Retrospective

  1. Run all three scripts before the session: 
    python sprint_health_scorer.py sprint_data.json --format text > health.txt
python retrospective_analyzer.py sprint_data.json --format text > retro.txt
  2. Open with the health score and top-flagged dimensions to focus discussion.
  3. Use the retrospective analyzer's action-item completion rate to determine how many new action items the team can realistically absorb (target: ≤3 if completion rate <60%).
  4. Assign each action item an owner and measurable success criterion before closing the session.
  5. Record new action items in sprint_data.json for tracking in the next cycle.

Team Development Workflow

Assessment

python sprint_health_scorer.py team_data.json > health_assessment.txt
python retrospective_analyzer.py team_data.json > retro_insights.txt
  • Map retrospective analyzer maturity output to the appropriate development stage.
  • Supplement with an anonymous psychological safety pulse survey (Edmondson 7-point scale) and individual 1:1 observations.
  • If maturity output is forming or storming, prioritise safety and conflict-facilitation interventions before process optimisation.

Intervention

Apply stage-specific facilitation (details in references/team-dynamics-framework.md):

Stage Focus
Forming Structure, process education, trust building
Storming Conflict facilitation, psychological safety maintenance
Norming Autonomy building, process ownership transfer
Performing Challenge introduction, innovation support

Progress Measurement

  • Sprint cadence: re-run health scorer; target overall score improvement of ≥5 points per quarter.
  • Monthly: psychological safety pulse survey; target >4.0/5.0.
  • Quarterly: full maturity re-assessment via retrospective analyzer.
  • If scores plateau or regress for 2 consecutive sprints, escalate intervention strategy (see references/team-dynamics-framework.md).

Key Metrics & Targets

Metric Target
Overall Health Score >80/100
Psychological Safety Index >4.0/5.0
Velocity CV (predictability) <20%
Commitment Reliability >85%
Scope Stability <15% mid-sprint changes
Blocker Resolution Time <3 days
Ceremony Engagement >90%
Retrospective Action Completion >70%

Limitations

  • Sample size: fewer than 6 sprints reduces Monte Carlo confidence; always state confidence intervals, not point estimates.
  • Data completeness: missing ceremony or story-completion fields suppress affected scoring dimensions — report gaps explicitly.
  • Context sensitivity: script recommendations must be interpreted alongside organisational and team context not captured in JSON data.
  • Quantitative bias: metrics do not replace qualitative observation; combine scores with direct team interaction.
  • Team size: techniques are optimised for 5–9 member teams; larger groups may require adaptation.
  • External factors: cross-team dependencies and organisational constraints are not fully modelled by single-team metrics.

For deep framework references see references/velocity-forecasting-guide.md and references/team-dynamics-framework.md. For template assets see assets/sprint_report_template.md and assets/team_health_check_template.md.