The weekly work plan is the engine of the Last Planner System. This is where rubber meets road—where lookahead planning translates into actual commitments for the coming week. Last planner system software centers on creating, tracking, and learning from weekly work plans.
Everything else in Last Planner exists to make weekly work plans reliable.
The Weekly Plan Purpose
Weekly work plan construction serves multiple purposes:
Commitment capture: Recording what each trade will accomplish this week.
Coordination: Ensuring commitments across trades align and enable handoffs.
Resource alignment: Confirming resources match commitments.
Communication: Ensuring everyone knows what's expected.
Measurement foundation: Establishing the basis for PPC calculation.
The weekly plan is the tactical expression of all strategic planning.
Drawing from Ready Work
Weekly plans draw from the workable backlog—activities made ready through lookahead schedule software constraint management. This connection is critical:
Only ready work enters plans: Activities with unresolved constraints don't belong on weekly plans.
Verification before commitment: Make-ready status is confirmed before foremen commit.
Alternative availability: The workable backlog provides options if primary activities can't proceed.
3 week lookahead schedule or 4 week lookahead schedule processes build the pool from which weekly plans draw.
Commitment vs Assignment
A fundamental distinction in last planner system software:
Assignment (traditional): "Here's what the schedule says you need to do this week."
Commitment (Last Planner): "What can you reliably commit to completing this week?"
This isn't semantic—it's philosophically different. Commitments come from those who will fulfill them. They reflect actual capacity, not schedule dictates.
Foreman scheduling app access empowers field personnel to make informed commitments.
The Commitment Conversation
Effective weekly work plan construction involves deliberate conversation:
Review available work: What activities are ready in the workable backlog?
Assess capacity: Given labor, equipment, and conditions, what can be accomplished?
Consider coordination: What do other trades need? What do we need from them?
Make commitments: Specific promises for specific deliverables.
Construction software should capture these commitments clearly during planning sessions.
Commitment Characteristics
Effective commitments have specific characteristics:
Specific scope: "Install receptacles and switches in units 101-108" not "work on electrical."
Clear completion criteria: Everyone knows what "complete" means.
Measurable: Completion can be objectively verified.
Time-bounded: By end of week or specific day.
Resource-supported: Labor, equipment, and materials confirmed available.
Construction schedule app tools should enforce these characteristics during commitment capture.
Coordination in Weekly Plans
Weekly plans must coordinate across trades. Subcontractor management software should highlight:
Handoff requirements: What must predecessors complete for successors to proceed?
Space conflicts: Are multiple trades working in the same area?
Resource sharing: Any shared equipment or access constraints?
Timing dependencies: Does work sequence matter within the week?
Rolling lookahead schedule information supports this coordination.
The Weekly Planning Session
Weekly planning typically happens in a dedicated session. Last planner system software supports effective sessions:
Session Structure
Review last week (15-20 min): Calculate PPC. Analyze variances. Identify lessons.
Update lookahead (20-30 min): Review constraint status. Identify ready work. Add new activities.
Plan next week (30-40 min): Capture commitments. Coordinate across trades. Confirm resources.
Wrap-up (5-10 min): Confirm all commitments captured. Distribute plans. Identify follow-up items.
Session Participation
Right attendance matters:
Superintendent: Leads the session, ensures coordination.
Trade foremen: Make commitments for their work.
Project engineer: Provides information, captures action items.
Key subcontractors: Representatives who can commit for their companies.
Tracking Through the Week
Weekly plans guide daily work. Field management software supports ongoing tracking:
Daily updates: Progress on commitments tracked throughout the week.
Issue identification: Problems that threaten completion surfaced early.
Adjustment communication: When plans must change, affected parties informed.
Completion verification: End-of-week confirmation of what was completed.
Construction schedule app mobile access enables real-time updates.
Calculating PPC
Percent Plan Complete (PPC) measures weekly plan reliability:
PPC = (Commitments Completed / Commitments Made) × 100
Lookahead schedule software should calculate PPC automatically based on commitment completion status.
PPC interpretation:
Above 80%: Strong reliability, good constraint management.
70-80%: Room for improvement, some constraint gaps.
Below 70%: Systemic issues with planning or constraint management.
Variance Analysis
When commitments aren't kept, understanding why drives improvement:
Capture the reason: For each incomplete commitment, why wasn't it completed?
Categorize: Materials, predecessor, labor, equipment, information, weather, over-commitment, etc.
Pattern recognition: What categories dominate failures?
Action planning: What process changes will address the patterns?
Crew scheduling software construction organizations use benefits from this analysis.
The Learning Loop
Weekly plans feed the learning loop that drives improvement:
Plan: Make commitments for the week.
Do: Execute the work.
Check: Measure completion, calculate PPC.
Act: Analyze variances, improve processes.
Each week provides data that improves subsequent weeks. Project management software for construction should support this cycle.
Weekly Plan Distribution
Plans are only useful if communicated. Construction software should provide:
Immediate distribution: Plans shared right after planning sessions.
Multiple formats: Email, mobile app, printed copies as needed.
Clear visibility: Each trade sees their commitments clearly.
Coordination views: Overall project view showing all trades.
Look ahead schedule construction context helps trades understand their work in context.
Common Weekly Planning Problems
Several issues undermine weekly plans:
Dictated commitments: Assignments masquerading as commitments.
Vague scope: Commitments not specific enough to track.
Unready work: Activities entering plans without constraint resolution.
Missing coordination: Trade commitments that don't align.
Inconsistent sessions: Planning meetings skipped or rushed.
6 week lookahead schedule and make-ready discipline prevent most of these.
Technology Support
Last planner system software supporting weekly plans should provide:
Commitment capture: Easy entry of commitments with required details.
Constraint verification: Confirmation that committed work is actually ready.
Coordination views: Visibility into how commitments relate across trades.
Progress tracking: Status updates throughout the week.
PPC calculation: Automatic calculation at week end.
Variance capture: Easy entry of reasons for incomplete work.
Distribution: Immediate sharing of completed plans.
Best Practices
Maximize weekly plan effectiveness:
Protect planning time: Sessions happen weekly without exception.
Right attendance: Decision-makers from each trade present.
Draw from ready work: Only plan work that's truly ready.
Capture clearly: Commitments specific and measurable.
Track daily: Monitor progress throughout the week.
Learn always: Every variance is a learning opportunity.
Conclusion
Weekly work plans are the heartbeat of last planner system software. This is where all other planning converges—master schedules, phase plans, lookahead constraint management—all to enable reliable weekly commitments.
Weekly work plan construction discipline produces predictable execution. Commitments made become commitments kept. PPC trends upward. Projects deliver reliably.
Master weekly planning. Everything else follows.