LABOR PLANNING GUIDE
Construction labor planning: turn estimated hours into a weekly manpower plan
Most labor problems on a job are visible weeks in advance, if someone has turned the estimate into a headcount. This guide shows a simple method any contractor can run in a spreadsheet: from estimated hours to a weekly manpower plan by trade, checked against the people you actually have.
THE SHORT ANSWER
Start from the labor hours by trade in your estimate. Spread each trade’s hours over the weeks its work is planned to run. Divide each week’s hours by the productive hours one worker delivers in a week, and round up. Add the trades together to get weekly headcount, then add your jobs together to see company-wide peaks. Check the peaks against the people you actually have, allowing for PTO, qualifications and other jobs, and update the next few weeks every week.
THREE DIFFERENT PLANS
Labor plan, crew schedule and project schedule
These three are often confused. The labor plan is the bridge between the estimate and the crew schedule, and it is the one most small and mid-size contractors skip.
| Plan | Answers | Horizon | Built from |
|---|---|---|---|
| Labor plan | How many people of each trade each job needs, week by week | Weeks to months | Estimate labor hours and the planned sequence of work |
| Crew schedule | Which named people and crews work where, on which days | Days to a few weeks | The labor plan, plus availability, qualifications and PTO |
| Project schedule | Which activities happen when, and in what order | The whole job | Durations, dependencies and the critical path |
THE METHOD
Build a weekly manpower plan in six steps
- List labor hours by trade. Take them from the estimate that won the job, not from a fresh guess. If the estimate groups labor by phase, keep that grouping.
- Set productive hours per worker-week. A 40-hour week rarely delivers 40 productive hours after travel, setup, weather and breaks. Use your own history. If you have none, start with a conservative figure and correct it after each job.
- Spread the hours over the weeks. Place each trade’s hours in the weeks its work is planned to run. If you have a project schedule, use its dates. If not, a simple sequence of phases is enough to start.
- Convert hours to headcount. For each trade and week, divide the hours by productive hours per worker-week and round up.
- Add across trades and jobs. The totals by week show your peaks. The company-wide total shows whether two jobs need the same people at the same time.
- Check it against real people. Compare each week with the people you have, allowing for approved PTO, required qualifications and commitments to other jobs. Resolve the gaps before they reach the field.
WORKED EXAMPLE
An eight-week job, week by week
An illustrative job with three trades. Productive hours are set at 32 per worker-week (a 40-hour week at 80% productive time). The figures are examples, not benchmarks.
| Trade | Estimated labor hours | Planned weeks |
|---|---|---|
| Concrete | 512 | Weeks 1–2 |
| Framing | 1,280 | Weeks 3–6 |
| Drywall | 768 | Weeks 6–8 |
Concrete: 512 hours over 2 weeks is 256 hours a week, and 256 ÷ 32 = 8 people. Framing: 1,280 hours over 4 weeks is 320 a week, which is 10 people. Drywall: 768 hours over 3 weeks is 256 a week, which is 8 people.
| Week | Concrete | Framing | Drywall | Total headcount |
|---|---|---|---|---|
| Week 1 | 8 | – | – | 8 |
| Week 2 | 8 | – | – | 8 |
| Week 3 | – | 10 | – | 10 |
| Week 4 | – | 10 | – | 10 |
| Week 5 | – | 10 | – | 10 |
| Week 6 | – | 10 | 8 | 18 |
| Week 7 | – | – | 8 | 8 |
| Week 8 | – | – | 8 | 8 |
Week 6 needs 18 people because framing and drywall overlap. That peak is the point of the exercise. You can staff it, shift the drywall start by a week, add a subcontractor, or accept a longer duration. What you should not do is discover it on the Monday of week 6.
KEEP IT CURRENT
A weekly lookahead instead of a one-time plan
- Every week, update the next two to six weeks with what actually happened: progress, weather, changes and absences.
- Replace planned hours with actual hours where you have them, and let the remaining work set the remaining headcount.
- Review the company-wide totals in one short meeting, so project managers are not competing for the same people in private.
- Add probable new work from your pipeline with a clear label, so you can see a future peak without treating it as committed. The weighted pipeline in our construction sales pipeline guide is a reasonable input.
If the plan shows you cannot staff a job you are about to price, that belongs in the capacity factor of your bid/no-bid decision. For a newly won job, the first weeks of the plan are part of getting ready to mobilize. See what happens after you win a construction bid.
COMMON MISTAKES
Where labor plans fail
- Using 40 productive hours per worker-week, which understates headcount on every job.
- Planning each job on its own, so two jobs quietly count on the same crew.
- Counting people who are on approved PTO or who lack a required qualification.
- Building the plan once at award and never updating it.
- Treating a labor plan as a cost forecast. Headcount is not cost until it is tied to actual pay and cost data.
WHERE QUOTAPARTNER FITS
From the plan to named people
The weekly plan in this guide is a spreadsheet method. QuotaPartner does not build it from your estimate for you. Where QuotaPartner helps, in its pilot-stage rollout, is the step after: projects state their labor needs, crews and employees are assigned with effective dates, and each assignment is checked against availability, qualifications, PTO, conflicts and overtime before it reaches the field. Labor cost by cost code and dependency-based project scheduling are not available yet. See how QuotaPartner schedules construction crews for current availability.
COMMON QUESTIONS
Frequently asked questions
What is construction labor planning?
It is working out how many people of each trade a job needs, and when, before you assign named people to it. A labor plan sits between the estimate, which tells you the hours, and the crew schedule, which tells people where to be.
How do you calculate manpower for a construction project?
Take the labor hours for each trade from the estimate, spread them over the weeks that work is planned to run, and divide each week’s hours by the productive hours one worker delivers in a week. Round up, then add the trades together to see the total headcount each week.
What is a manpower loading chart or histogram?
It is a chart of headcount per week, usually stacked by trade. Its value is showing peaks: weeks where the job, or the company across jobs, needs more people than it has. The table in this guide is the same information before it is drawn as a chart.
What is the difference between labor planning and labor forecasting?
Planning usually means headcount by trade and week for known work. Forecasting usually looks further ahead across all jobs, including work you expect to win, and is often expressed as hours or cost. Forecasting labor cost by cost code needs actual cost data from your accounting or job cost records.