HAWKEYE SYSTEMS

Short Interval Planning in Construction: A Field Guide

Short interval planning bridges the master schedule and daily crew work. Learn the steps, the huddle, the constraint log and the PPC metric that proves it works.

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Short interval planning (SIP) is a way of breaking the master schedule into small, committed pieces of work, usually a few weeks out, then a week, then a day, so that crews start each shift with a task that is actually ready to build. On most jobsites it shows up as a look-ahead schedule, a weekly work plan and a daily huddle. This guide explains how those three pieces fit together, how to run them, and where teams go wrong.

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TL;DR

SIP does not replace your critical path method (CPM) master schedule. It turns the master schedule into field-level commitments the crew can keep.
The core of the method is constraint removal: materials, permits, equipment and prerequisite work have to be cleared before a task is promised.
A look-ahead of roughly two to four weeks feeds a weekly plan, which feeds a 10 to 15 minute daily huddle.
Track Percent Plan Complete (PPC) every week. Reported industry averages sit around 50 to 60%, while disciplined teams report 80% and higher.
A spreadsheet can start the habit, but the plan only stays alive when field updates and office review share one record.

What short interval planning actually is
Why the master schedule alone is not enough
The look-ahead: where constraints get removed
From look-ahead to weekly work plan
The daily huddle
Measuring it: Percent Plan Complete
A worked example
Where SIP breaks down
Where software helps
Our perspective: plan, record, review, bill
How Hawkeye supports short interval planning
Getting started this month
FAQ
Sources

What short interval planning actually is

The technique has roots in manufacturing, where shifts were split into short segments so supervisors could correct course during the shift instead of after it. Construction borrowed the idea. The research on construction workflow describes how a CPM schedule gives the roadmap, while SIP supplies the tactical, field-level control needed when conditions change daily.

You will also hear it called short interval scheduling or short interval control. In practice the labels overlap. What matters is the cadence:

Master or phase schedule. The CPM roadmap, with milestones.
Look-ahead plan. The next two to four weeks, pulled from the master schedule and broken into workable activities.
Weekly work plan. Only tasks that passed a readiness check, assigned to named crews.
Daily huddle and daily plan. The commitments for today, by crew and by area.

If you have heard “SIP” used on a project, it was most likely the weekly or daily sheet a superintendent and foremen fill out together. The Last Planner System describes look-ahead planning as the intermediate process that connects the master schedule to the weekly work plan, which is the same bridge SIP builds.

Why the master schedule alone is not enough

A master schedule is built months ahead, at the level of phases and milestones. It cannot know that the rebar delivery slipped two days, that the inspector is booked Thursday, or that the crane is shared with another site. The gap between the plan and the field is where hours get lost.

Academic work on short-interval scheduling in construction opens with this same observation: many site problems trace back to a lack of detailed planning and scheduling. The master schedule is not wrong. It is simply too coarse to run a crew from.

The lean construction view is that the two tools work in tandem. CPM keeps the whole project honest about dates. SIP keeps this week honest about what can really be built.

The look-ahead: where constraints get removed

The look-ahead is the most valuable part of SIP, because it is where you have time to fix things. Most teams run it as a two-week, three-week or four-week window. Two weeks is common on fast-moving interior work. Longer windows suit jobs with long procurement or inspection lead times.

The goal is a “make-ready” process. For every activity entering the window, the team asks what could stop it from starting on the planned day, then assigns an owner and a due date to clear each blocker. Research on weekly work planning frames this as removing constraints to make tasks ready before they reach the crew.

A constraint checklist that works

For each activity in the window, check:

Prior work: is the predecessor complete, inspected and accepted?
Materials: ordered, confirmed, delivered, and staged where the crew will work?
Equipment: reserved, fueled, certified, and not double-booked?
Labor: are the right people available, and are their required training and certifications current?
Permits and inspections: issued, scheduled, and valid for the work date?
Information: are drawings, RFIs and submittals answered and current?
Space: will another trade be standing in the same area?

Keep the result in a constraint log: the activity, the blocker, who owns it, and the date it must clear. Review the log in every look-ahead meeting. An item that stays red for two meetings in a row is a signal to escalate, not to re-date.

From look-ahead to weekly work plan

Only ready work should move from the look-ahead into the weekly plan. Researchers call the failure here “shielding” failure: managers push tasks into the week that are not actually ready, so crews inherit upstream uncertainty. The same paper describes quality criteria for tasks entering the weekly plan: definition, soundness, sequence, size and learning.

In plain terms, before a task goes on the weekly plan:

Criterion | The question to ask

Definition | Is the scope specific enough that the foreman knows when it is done?

Soundness | Are all constraints cleared, so it can start on the day promised?

Sequence | Does it follow the order the work will really be built in?

Size | Can this crew finish it within the week with its actual manpower?

Learning | If we missed last week, do we know why and have we changed something?

The foremen and crew leads should be the ones making the promise. One long-cited study notes that teams fail when foremen treat the plan as dictation from management instead of a commitment they own. A plan that the person doing the work never agreed to is just a forecast.

The daily huddle

The huddle is the last link. Supervisors describe it as a 10 to 15 minute meeting at the start of the shift where the weekly plan turns into specific commitments for the day. Keep it short and standing, with a fixed agenda:

What did we commit to yesterday, and what finished?
For anything that did not, what was the cause, in one phrase?
What are today’s commitments by crew and area?
Any new constraints: weather, deliveries, access, safety hazards?
Who needs help from whom, and by when?

The “cause in one phrase” step is what feeds learning. Over a few weeks the pattern is visible: late deliveries, unclear drawings, trade overlap. Those patterns are what you take to the owner’s rep or the procurement team.

Measuring it: Percent Plan Complete

Percent Plan Complete (PPC) is the number of tasks finished as promised divided by the number promised, for the week. If a crew committed to 20 tasks and finished 15, PPC is 75%.

Reported figures put the industry average between 50% and 60%, with high-performing projects reaching 80 to 86% by using pull planning and look-ahead meetings. Treat those as reference points, not targets to chase on day one. A consultancy that works with contractors notes that measuring PPC each week and improving it steadily is a foundation of the Last Planner System.

Two cautions:

PPC measures reliability, not speed. A team can score 95% by promising very little. Pair it with the master schedule’s milestone dates.
Always record the reason for each miss. A PPC number without reason codes tells you that you are failing, never why.

A worked example

Say you are the superintendent on a four-story building, and your two-week look-ahead includes drywall hang on level 3.

Look-ahead review, Monday of week one. Constraints: in-wall inspection not yet scheduled, board delivery unconfirmed, level 2 framing punch list open. You assign owners: the PM books the inspection, the purchasing contact confirms delivery, and the framing foreman closes the punch list by Thursday.
Weekly planning, Friday. The inspection passed and the delivery is confirmed, so drywall hang moves into next week’s plan. The ceiling grid on the same level is not ready, so it stays in the look-ahead.
Daily huddle, Monday. The drywall foreman commits to 40% of level 3, with four people. A forklift is needed at 7 a.m., so the equipment owner confirms it on the spot.
End of week. The crew finished 40% on time. The task counts as complete for PPC, and the ceiling grid constraint is reviewed again.

Nothing here is complicated. The discipline is in doing it every week and writing it down.

Where SIP breaks down

Most failures come from a few predictable habits:

The plan as a static spreadsheet. The value is in the conversation about constraints, not in the file. A sheet that is updated once a week is already stale on Tuesday.
Management-written plans. If foremen do not make the commitments, they will not defend them.
Pushing unready work. This breaks the weekly plan on day one and teaches crews to ignore it.
No feedback loop. Misses without reasons repeat.
Detail mismatch. Too fine and nobody keeps it up; too coarse and it duplicates the master schedule.

There is also a timing problem. Practitioners in other field-heavy industries note that with manual processes, managers often learn of a problem only after the shift ends, while live, integrated data allows corrections during the shift. Whiteboards and paper sheets are the usual culprits on construction sites, too.

Where software helps

Paper and spreadsheets are fine for starting. Software earns its place when the project is large enough that these become hard to keep consistent:

Crew assignments change daily and the weekly plan must reflect them.
Labor hours, equipment use and daily work records need to line up with what was planned.
The office needs to review and bill from the same record the field produced.
Training and certifications must be checked before a crew is assigned.

The handoff problem is real. A plan made in one tool, hours recorded in another and daily reports on paper means someone retypes everything for billing, and errors creep in. The fix is one connected record from assignment to billing. Our guides on daily construction reports, construction labor tracking and digital work orders cover each of those handoffs in detail.

Our perspective: plan, record, review, bill

We build field operations software, so we see what happens after the planning meeting ends. The plan is only as good as what the field can confirm against it. In our experience, the teams that get lasting value from short interval planning do three things.

First, they keep the plan and the record in the same place. Crew assignments, the daily work record, labor and equipment hours, and the photos that prove progress should connect, so the question at the huddle (“what did we actually do yesterday?”) has a real answer instead of a recollection.

Second, they treat readiness as a constraint like any other. A crew that is assigned but not trained or certified for the task is a hidden blocker. That is why we track workforce learning and readiness next to scheduling, rather than as a separate HR exercise.

Third, they make every handoff traceable. When a change order, a delay or a billing question comes up weeks later, the context that explains it was captured when it happened, not reconstructed afterward. Our guide on change order tracking shows how field proof speeds up approvals.

A short interval plan is a promise. The software’s job is to make keeping and proving that promise cheaper than breaking it.

— Client

How Hawkeye supports short interval planning

If your look-ahead lives in spreadsheets and your daily reports live on paper, Hawkeye Field Ops connects crew scheduling, job planning, labor and equipment tracking, field ticketing and daily work records, then prepares billing and payroll documents from the same data. For crews working in the field, see how crew and operations planning works, or the construction solution built for contractors. For remote sites, Hawkeye Security adds mobile surveillance so you can see site conditions without driving out. Pricing is not published; a walkthrough is the way to see whether it fits your projects.

Getting started this month

You do not need to change everything at once. A practical first month looks like this:

Week 1: Build a two-week look-ahead from the current master schedule. Keep it to one page. Hold the first constraint review with the foremen in the room.
Week 2: Start the weekly work plan with only ready tasks. Record the PPC at the end of the week, honestly.
Week 3: Add the 10 to 15 minute daily huddle. Write down the cause of each miss.
Week 4: Review the reason codes. Pick the top two causes and fix them upstream, whether that is procurement lead times, submittal turnaround or trade coordination.

Only after that rhythm holds is it worth deciding which parts of the process need better tooling.

FAQ

What does SIP mean in construction?

SIP stands for short interval planning, sometimes short interval scheduling or control. It is a method of breaking the master schedule into small, near-term commitments: a look-ahead, a weekly plan and a daily huddle. The aim is to start every task only when its constraints are cleared.

How long should a look-ahead schedule be?

Most contractors use two to four weeks. Two weeks works well for fast interior or finish work, while longer windows give more time to fix procurement and permitting issues. Choose the window that matches your longest lead time for clearing a constraint.

Does short interval planning replace the CPM schedule?

No. The CPM schedule sets the roadmap and key dates, and SIP controls the field-level work needed to meet them. Lean construction practitioners describe the two as used together, not as alternatives.

What is a good PPC score?

Reported industry averages run from 50 to 60%, and strong projects report 80 to 86%. Your own trend matters more than the benchmark. Rising PPC with a documented reason for every miss means the process is working.

Sources

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