What gets measured gets managed. Last planner system software generates rich data about planning and execution. Knowing which metrics matter—and which don't—focuses improvement efforts where they'll have the most impact. This guide identifies the metrics that drive Last Planner success.
Measure what matters. Improve what you measure.
The Primary Metric: PPC
Percent Plan Complete (PPC) is the signature Last Planner metric:
PPC = (Commitments Completed / Commitments Made) × 100
PPC matters because it measures reliability at the fundamental level—individual commitments. High PPC indicates reliable planning; low PPC indicates systemic issues.
Weekly work plan construction discipline produces consistent PPC data for analysis.
PPC Dimensions
Break PPC down for deeper insight:
Project PPC: Overall project reliability.
Trade PPC: Which trades are reliable? Subcontractor management software should track this.
Phase PPC: Which project phases are challenging?
Area PPC: Are certain building areas problematic?
Trend PPC: Is reliability improving over time?
Lookahead schedule software should provide these views.
PPC Targets
What PPC should you target?
Initial implementation: 60-70% is typical for teams new to Last Planner.
Developing: 70-80% indicates progress.
Mature: 80-90% reflects strong discipline.
Caution zone: Above 90% might indicate under-commitment.
Focus on improvement trend more than absolute numbers.
Variance Metrics
Variance analysis reveals why PPC misses targets:
Variance by category: Which constraint types cause most failures? Materials? Predecessors? Labor?
Variance by trade: Which trades have distinctive failure patterns?
Variance by phase: Do certain phases have characteristic challenges?
Variance trends: Are specific categories improving or worsening?
Construction software should aggregate and visualize variance data.
Constraint Metrics
Constraint management effectiveness shows in these metrics:
Constraint identification lead time: How far ahead are constraints identified? 3 week lookahead schedule vs 6 week lookahead schedule identification timing.
Resolution cycle time: How long do constraints take to resolve?
On-time resolution rate: What percentage of constraints are resolved before needed?
Constraint-related failures: How many PPC misses are due to unresolved constraints?
Rolling lookahead schedule discipline should improve these metrics.
Make-Ready Metrics
Track make-ready process health:
Workable backlog size: How much ready work is available?
Ready rate: What percentage of activities become ready on schedule?
Constraint density: How many constraints per activity?
Make-ready effectiveness: How reliably does make-ready work flow to weekly plans?
4 week lookahead schedule or 6 week lookahead schedule processes should produce healthy make-ready metrics.
Commitment Quality Metrics
Not all commitments are equal. Track quality:
Commitment specificity: Are commitments specific and measurable?
Commitment realism: Are completion rates near 100% (potential over-commitment) or very low (under-commitment)?
Commitment completeness: Do commitments cover all critical work?
Coordination alignment: Do trade commitments align for handoffs?
Foreman scheduling app commitment capture should support quality assessment.
Participation Metrics
Last Planner requires participation. Track it:
Session attendance: Are the right people attending planning sessions?
Active participation: Are attendees contributing, not just observing?
Commitment sources: Are commitments coming from those who will fulfill them?
Software adoption: Are teams using construction schedule app tools as intended?
Learning Metrics
Track whether learning is happening:
Variance capture rate: Are failure reasons being documented?
Action completion: Are improvement actions being implemented?
Pattern recurrence: Are the same problems happening repeatedly?
PPC improvement: Is overall reliability increasing?
Field management software should support learning metrics.
Project Outcome Metrics
Connect Last Planner to project outcomes:
Schedule performance: Correlation between PPC and schedule adherence.
Cost performance: Relationship between planning reliability and cost outcomes.
Safety: Connection between planning quality and safety performance.
Quality: Link between planning discipline and quality outcomes.
Look ahead schedule construction practices should correlate with better outcomes.
Portfolio Metrics
Organizations managing multiple projects track portfolio-level metrics:
Portfolio PPC: Aggregate reliability across projects.
Project comparison: Which projects excel at Last Planner?
Team comparison: Which teams achieve highest reliability?
Organizational trends: Is the organization improving overall?
Project management software for construction should provide portfolio views.
Leading vs Lagging Metrics
Distinguish between metric types:
Leading (Predictive)
Constraint status: Unresolved constraints predict future PPC problems.
Workable backlog: Insufficient ready work predicts planning challenges.
Participation: Poor attendance predicts poor plans.
Lagging (Historical)
PPC: Measures past performance.
Variance totals: Summarizes historical failures.
Schedule variance: Shows cumulative impact.
Balance attention between leading and lagging indicators.
Avoiding Metric Pitfalls
Metrics can mislead. Avoid these pitfalls:
Gaming: Manipulating metrics rather than improving performance.
Over-measurement: Tracking too many metrics dilutes focus.
Measurement without action: Generating reports that no one uses.
False precision: Treating approximate measures as exact.
Metric displacement: Focusing on metrics rather than outcomes.
Metric Review Cadence
Different metrics need different review frequencies:
Weekly: PPC, variance summary, constraint status.
Monthly: Trends, patterns, category analysis.
Quarterly: Portfolio comparison, organizational trends.
Project end: Overall performance, lessons learned.
Construction lookahead software should support appropriate review cadences.
Technology Support
Last planner system software metric capabilities should include:
Automatic calculation: Metrics computed from entered data.
Visual dashboards: Clear displays of key metrics.
Drill-down: Ability to explore underlying detail.
Trend charts: Time-series visualization.
Export: Data export for additional analysis.
Alerts: Notification when metrics cross thresholds.
Using Metrics for Improvement
Metrics should drive action:
Identify gaps: Where do metrics indicate problems?
Analyze causes: Why are certain metrics problematic?
Plan improvements: What changes will address causes?
Implement: Make the planned changes.
Measure impact: Did metrics improve?
Crew scheduling software construction teams use should reflect metric-driven improvements.
Communicating Metrics
Share metrics appropriately:
Project teams: Weekly PPC and variance in planning sessions.
Subcontractors: Trade-specific PPC and improvement opportunities.
Executives: Portfolio trends and organizational performance.
Owners: Project-level reliability indicators.
Tailor communication to audience needs.
Conclusion
The metrics that matter in last planner system software implementation focus on reliability, constraints, make-ready effectiveness, and learning. PPC is the primary metric; variance analysis reveals improvement opportunities; constraint metrics predict future performance.
Measure what matters. Use metrics to drive improvement. Weekly work plan construction discipline produces the data; analysis converts data to insight; action converts insight to improvement.
Track these metrics. Transform your projects.