Project Scheduling: How to Plan a Building Project

Project scheduling begins before anyone arrives on site. Design decisions, permit reviews, contractor selection, material orders, inspections, and handover all take time. A useful schedule connects those activities so the team can see what must happen next and which decisions cannot wait.

For an owner, the goal is a working plan with clear responsibilities and realistic assumptions. Start with the milestones that matter, then ask the project team to explain the work and dependencies behind each date.

Start with milestones and responsibilities

Write down the dates that affect your plans: when funding must be available, when you need access to the building, and whether an existing lease or seasonal constraint creates a deadline. Distinguish a preferred target from a contractual milestone or an approval that another organization controls.

• Define what each milestone means. “Ready to move in” may involve different conditions than finishing the physical work.
• Identify who prepares the schedule, who supplies updates, and who can authorize changes. Confirm those arrangements in the project agreements.
• Record assumptions about working days, access, weather, inspections, and owner decisions.
• Ask the team to test the desired completion date before making commitments that depend on it.

Include the whole project

A construction schedule is one part of the overall timeline. The owner’s plan should also allow for surveys and investigations, design and consultant coordination, pricing, approvals, contract arrangements, purchasing, and project closeout.

The sequence depends on the delivery method. Traditional design–bid–build generally separates design, bidding, and construction; other arrangements may overlap phases. The AIA and AGC project delivery primer explains these differences. Agree on any overlap with the team, including the information needed and the risk of later changes.

Use the Project Planning Checklist to identify early decisions, and review the Construction Bidding guide before setting a contractor selection deadline.

Connect activities to their prerequisites

A bar with a start and finish date does not explain why the work can happen then. Ask what must be complete before each activity starts. A delivery may depend on an approved selection and an order release; installation may also require access, completed supporting work, available labor, and an inspection.

Include work supplied directly by the owner, such as equipment or specialist installations. Give each decision a named responsible person and a date when the answer is needed. “Select lighting” is more useful when it identifies the package, the decision maker, and the purchasing activity it supports.

Understand the critical path and available flexibility

The critical path identifies the chain of activities driving completion. A delay on that chain can move the finish date. Total float describes how much an activity can slip before affecting the relevant completion milestone under the schedule’s current logic and constraints; it may be shared by several activities.

These concepts come from the GAO Schedule Assessment Guide. Ask the scheduler which activities currently drive completion and which have little flexibility. Missing links or unrealistic assumptions can make the reported critical path misleading. Recheck it as work progresses.

Plan purchasing before installation

For a long-lead item, the delivery period is only one part of the chain. Allow for selection, preparation of shop drawings or product information, review and possible corrections, order release, fabrication, transport, and site readiness.

The AIA Contract Documents construction administration guide emphasizes coordinating submittal dates and review periods with construction. Confirm the actual review process and responsibilities for your project. Obtain current lead times from the supplier and identify what must happen before the quoted delivery period starts.

Example: work backward from a delivery date

Suppose a fictional project needs an item delivered on June 15, 2027. For this example only, assume six calendar weeks from order release to delivery, two calendar weeks for review and corrections, and one calendar week to prepare the submittal after the owner’s selection. These are illustrative assumptions, not standard industry lead times.

Milestone	Example date	Time allowed to next step
Owner selection complete	April 13, 2027	1 calendar week for preparation
Submittal ready for review	April 20, 2027	2 calendar weeks for review and corrections
Order released	May 4, 2027	6 calendar weeks to delivery
Required site delivery	June 15, 2027	Installation scheduled separately

The owner’s selection is needed nine weeks before delivery in this example. Replace every assumption with the team’s actual calendars, review requirements, supplier commitments, and risk allowances. A late selection needs a fresh forecast of the affected chain; its effect on overall completion depends on how that chain connects to the rest of the work.

Keep the agreed plan and the current forecast

Retain the agreed baseline so the team can compare intended dates with actual progress and the latest forecast. Each update should identify its status date, actual starts and finishes, remaining work, and changes to the sequence. The GAO guide recommends updating from progress and logic while controlling baseline changes.

Agree on an update frequency that suits the project. Use a short look-ahead for upcoming work, decisions, deliveries, and inspections. A two- or three-week view can support coordination, while the overall schedule shows whether those activities still support the completion milestones.

Review changes before accepting a new finish date

When a change or delay arises, record the event, the affected activities, the proposed response, and the forecast impact. Ask whether another sequence is practical and what it would cost. Do not simply add every reported delay together: some activities may overlap or have available flexibility.

Use the Change Order Log to track requested time adjustments and their approval status. A schedule forecast and an agreed change to contract time are separate records; follow the project’s change procedure.

Schedule handover before the final week

Allow for testing, required inspections and occupancy approvals, owner training, manuals, warranties, outstanding work, and document delivery. Ask who will arrange each item and what must be complete before the next milestone can occur.

Use the Punch List Worksheet to track unfinished items and the Project Closeout Checklist to organize the handover record.

Questions to bring to the next project meeting

• Which activities are driving the current completion date?
• What decisions or information do you need from me next, and by when?
• Which material delivery dates are confirmed, and what conditions apply?
• What has changed since the previous update?
• Which approvals, tests, or handover items could prevent use of the building?
• What action should we take now, who owns it, and when will we review it?

Keep those answers alongside the current schedule. For related guidance and working tools, visit Project Management and the Resources library.