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What weekly work-plan reliability means
A reliable weekly work plan contains only assignments that a crew can actually complete during the stated week. Each assignment has a defined scope, location, completion condition, predecessor status, required information, resources, and handoff expectation. Reliability is therefore different from producing a detailed-looking schedule. A plan can contain hundreds of activities and still be unreliable if materials, access, design information, inspections, labor, or predecessor work are unresolved.
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Lean Construction Institute describes the “last planner” as the person closest to the work who has authority to make schedule decisions and reliable commitments for that discipline. In practice, this is usually a trade foreman, general foreman, superintendent, or another lead who controls the crew and sequence. A manager may facilitate the conversation, but should not promise work on behalf of a trade lead who cannot control the prerequisites.
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1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsLCI reports that an average of 54% of work planned for a given week is completed within the allotted schedule on traditional design and construction projects. The cited LCI page does not state the underlying study or year, so treat 54% as LCI’s reported figure, not a current universal benchmark or a prediction for your project. The purpose of LPS is to make the planning system more predictable, not to chase an unsupported target.
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The planning sequence: from milestone to daily action
Planning should become more detailed as work approaches. Each level answers a different question and supplies information to the next level.
| Planning level | Question answered | Typical output | Who participates |
|---|---|---|---|
| Master schedule | What major dates must the project meet? | Contract milestones, turnover dates, major procurement and commissioning dates | Owner, design team, general contractor and major trade leaders |
| Phase or pull plan | What sequence and handoffs are needed to reach a milestone? | Collaboratively agreed predecessor and successor activities, durations and handoffs | People responsible for each phase, working backward from the milestone |
| Lookahead and make-ready | What upcoming work can be prepared, and what is preventing it? | Broken-down activities, constraint log, responsible owners and resolution dates | Superintendent, planner and trade representatives |
| Weekly work plan | What will each crew actually complete this week? | Specific, measurable commitments with location, scope and completion conditions | Last planners who control and perform the work |
| Daily huddle | Is today’s work on track, and what changed? | Progress check, new blockers, handoff coordination and resequencing decisions | Field supervisors and affected crews |
Pull planning works backward from a milestone: the team first defines the required handoff, then the work that must precede it, continuing until the sequence is understood. This gives the lookahead and weekly conversations a meaningful context instead of treating isolated activities as independent tasks.
Run a rolling lookahead as a make-ready process
A lookahead is not merely a short version of the critical-path schedule. It is a recurring examination of upcoming work to determine whether each activity can become a dependable commitment. The LCI workbook uses an upcoming six-week plan updated weekly as an example. Six weeks is not a universal rule; choose a horizon long enough to clear your project’s design, procurement, access and trade lead-time constraints.
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Convert broad schedule bars into operations a crew can start and finish. “Install drywall, Level 3” may need to become room or zone-based activities with explicit quantities, access requirements and inspection points. The right size is large enough to manage efficiently but small enough that the crew can state an unambiguous completion condition within the planning period.
Identify constraints before promising the work
For each upcoming operation, ask what must be true before work can begin and what must be true before it can be handed off. Typical constraints include:
- Predecessor work incomplete, out of tolerance or not released by inspection.
- Materials, equipment, tools or prefabricated components not delivered, approved or available in the required quantity.
- Labor, specialist crews or shared resources unavailable at the planned time.
- Access, laydown space, temporary protection, power, lighting or safe work areas not ready.
- Drawings, specifications, RFIs, surveys, layouts or other information not issued or understood.
- Permits, approvals, testing or inspections not scheduled and passed.
- Weather, site conditions or changed conditions that could alter the sequence.
Record one owner for every constraint and a date by which it must be resolved. The owner is responsible for driving the action, not merely attending a meeting. If a constraint has no realistic resolution date, keep the activity in the lookahead but do not bring it into the weekly commitment plan.
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Use a constraint log that drives decisions
A practical log can contain the activity, location, constraint category, description, owner, required-by date, current status and evidence of release. Review open items at each lookahead meeting. Escalate an item when the responsible party lacks authority, procurement lead time exceeds the horizon, or a predecessor is unlikely to recover. Closing a constraint means verifying that the prerequisite is genuinely available, not simply changing a status field.
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Hold a weekly commitment conversation
The weekly meeting should select only work that has passed the make-ready test. Have the last planner for each trade state the commitment in their own words. A facilitator can challenge an assumption, coordinate interfaces and record the plan, but should not replace the person accountable for execution.
- Confirm the week and milestone context. Review the phase plan, current milestone, available work areas and any non-negotiable handoffs.
- Review carried-over work. For incomplete prior assignments, determine what is actually finished, what remains, and whether the original completion condition still applies.
- Check readiness. Verify that constraints are closed or have a documented, credible release before the planned start.
- State a measurable assignment. Include trade, activity, location, quantity or extent, start and finish window, and the condition that proves completion.
- Test handoffs. Ask what the next crew needs and when it needs it. Add protection, cleaning, survey points, testing records or inspection sign-off when those are part of the release.
- Record the promise visibly. Put the assignment on the shared weekly plan with one accountable trade lead and any supporting parties.
- Remove or defer weak promises. If a prerequisite is uncertain, move the work back to the lookahead and assign the constraint instead of inflating the weekly plan.
Write assignments that can be judged consistently
“Electrical rough-in, Level 2” is too vague to score. A stronger commitment is: “Electrical subcontractor will install and label all branch circuit boxes in Rooms 201–208 on Level 2 by Thursday 4 p.m.; walls are released, approved layout is issued, and the area will be ready for framing inspection.” The completion condition should be observable by someone other than the person making the promise.
Do not award partial completion unless the project has deliberately defined a partial-assignment method and will apply it consistently. Splitting a large operation into smaller, independently complete assignments before the week begins is usually clearer than declaring half of one promise complete.
Make handoffs explicit
Flow fails when a trade finishes its own visible task but does not release usable work. Define completion from the receiving trade’s perspective. For example, a mechanical installation may require pressure-test records, capped penetrations, protection and a signed inspection before the ceiling trade can proceed. A framing area may need debris removed, layout verified and access kept clear.
For every weekly assignment, record:
- The physical boundary: building, level, room, grid, elevation or work package.
- The measurable extent: count, area, length, percentage only when the percentage has a defined basis, or a list of rooms.
- The quality and verification condition: test, inspection, survey, sign-off or documented checklist.
- The receiving trade and the exact release time or date.
- Any temporary protection, access or housekeeping needed to preserve the handoff.
Coordinate with short daily huddles
Daily huddles keep the weekly plan connected to field conditions. They should be brief and held where the work is coordinated, with the current commitments and open blockers visible. Compare yesterday’s actual progress with today’s promise, then ask what could prevent the next handoff.
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Use the huddle to surface new delivery delays, failed inspections, access conflicts, unsafe conditions, design clarifications, crew shortages or weather changes. The affected supervisors should agree on an action, owner and timing. If the original sequence is no longer feasible, resequence transparently and update the weekly plan; do not leave an obsolete promise in place and wait until the end of the week to explain it.
Calculate and use Percent Plan Complete (PPC)
PPC is the percentage of weekly assignments completed as promised:
PPC = (number of weekly assignments completed as promised ÷ number of assignments promised for the week) × 100
For example, if a team makes 20 assignments and 15 meet their stated completion conditions by the agreed deadline, PPC is 75%. Decide in advance what “complete as promised” means, retain the same denominator rule, and use the same assignment boundaries from week to week so the trend remains comparable.
| Week | Promises made | Completed as promised | PPC | What to examine |
|---|---|---|---|---|
| Week 1 | 20 | 15 | 75% | Are misses concentrated in one trade, location or constraint type? |
| Week 2 | 18 | 15 | 83.3% | Did make-ready actions remove the causes found in Week 1? |
| Week 3 | 22 | 15 | 68.2% | Did the plan contain too many unready or oversized assignments? |
PPC measures promise reliability, not overall project progress. A project can show high PPC on small tasks while a major milestone slips, or low PPC because the team is attempting a large recovery plan while production quantities improve. Pair PPC with milestone status, installed quantities, productivity information where available, and handoff outcomes. The 2011 paper by Hamzeh, Ballard and Tommelein cautions that the relationship between PPC and project progress depends on the whole planning system functioning as intended.
Do not set a universal PPC target from the available evidence. Project type, phase, uncertainty, assignment size and planning discipline affect the number. Use the trend to diagnose the system and agree on locally meaningful improvement actions.
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Review misses as system feedback
At the weekly review, examine every missed assignment factually. Ask what prevented completion, whether the constraint should have been visible earlier, and what change will prevent recurrence. The purpose is learning and corrective action, not a public ranking of crews.
| Variance category | Diagnostic questions | Typical corrective action |
|---|---|---|
| Predecessor incomplete | Was the predecessor’s completion condition defined and checked before promising the successor? | Add an explicit handoff test, adjust sequence or reserve recovery capacity. |
| Material or equipment | Was the item approved, ordered, delivered, inspected and available in the required quantity? | Assign procurement ownership, verify delivery dates and create a delivery-release checkpoint. |
| Labor or resource | Was the committed crew available, competent and free from competing work? | Reconcile staffing and work-in-process before the weekly meeting. |
| Information or design | Were drawings, RFIs, layouts and field decisions issued and understood? | Set an information-required-by date and escalate unanswered decisions. |
| Access or workspace | Was the area released, safe, lit, powered and free of conflicting operations? | Coordinate area ownership, logistics and protection in the lookahead. |
| Approval or inspection | Was the inspection booked with enough lead time, and were acceptance criteria known? | Schedule the inspection as a prerequisite and include required records in the handoff. |
| Weather or changed condition | Was the risk foreseeable, and was an alternative operation ready? | Prepare resequencing options and protect weather-sensitive work. |
Track the cause, responsible process owner and agreed countermeasure. Look for recurring patterns rather than stopping at the immediate explanation. If “material late” appears repeatedly, the deeper issue may be late approvals, inaccurate quantities, a missing release gate or an unrealistic procurement lead time.
Choose tools that support the process
A large onsite whiteboard or visual chart can make commitments, prerequisites and constraints visible to crews. A digital board can add history, notifications, photographs and remote access. Neither format creates reliable work by itself. Evaluate any implementation against five questions:
- Does it expose prerequisites early enough to clear them?
- Are the people with authority and field knowledge making the commitments?
- Are completion conditions and downstream handoffs visible?
- Can the team record PPC and variance causes without changing definitions?
- Can supervisors see and update current commitments at the place where work is coordinated?
Use one shared source of truth for the current week. If a paper board is the field record and a spreadsheet is the reporting record, define who reconciles them and when; otherwise the team will debate which plan is current instead of solving constraints.
Common failure modes and fixes
Copying the CPM schedule into the weekly plan
A critical-path activity is not automatically ready. Break it down, verify prerequisites and have the responsible trade lead accept the resulting assignment.
Managers making promises for trades
This hides uncertainty and removes authority from the person who controls labor and sequence. Ask the trade lead to commit, or record the item as a constraint requiring resolution.
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Using PPC as a score for productivity, safety or quality
PPC answers whether stated weekly promises were kept. It does not measure production rate, safe behavior, workmanship or total project progress. Keep those measures separate and investigate interactions rather than merging them into one score.
Changing the denominator or completion rule
Removing difficult assignments after the week starts or awarding partial credit makes the trend meaningless. Freeze the weekly promise list at the agreed cutoff and document any approved change with its reason.
Blaming the crew for every miss
Fear encourages people to under-promise or hide blockers. Use non-confrontational, fact-based reviews so contributors report constraints early and the team can correct the planning system.
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Adopting a fixed meeting cadence without regard to lead times
The sources describe several conventions, including a six-week example and a typical several-week horizon. Set the lookahead length, weekly cutoff and huddle timing around your procurement, design, inspection and access lead times. The correct cadence is the one that gives owners enough time to remove constraints before the commitment date.
A practical 30-day implementation
- Days 1–5: establish definitions. Select one pilot area, define an assignment, completion and handoff, and identify the last planners for each trade.
- Days 6–10: build the phase context. Confirm the next milestone, map the required handoffs backward and create the first rolling lookahead.
- Days 11–15: open the constraint log. Break upcoming work into operations, assign owners and dates, and verify which items are ready for the first weekly plan.
- Days 16–22: run the first commitment week. Record only ready assignments, hold daily huddles, and capture changes without rewriting history.
- Days 23–30: calculate and learn. Compute PPC using the agreed rule, classify every miss, assign countermeasures and adjust the next lookahead. Expand to additional areas only after the pilot meeting produces clear commitments and usable variance data.
After the pilot, keep the cycle continuous: milestone and phase context inform the lookahead; the make-ready process supplies ready work; last planners make weekly promises; huddles protect those promises; and the PPC review improves the next cycle. That closed loop is what makes weekly planning reliable.
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