
Sizing a crew for the work: when adding people slows it down
Find the optimal crew size for a task from the quantity, the open work fronts and the supervision it needs, and spot when extra people slow it.
Labour is the cost a site team controls most directly, and most lost hours are lost to waiting. These lessons cover how many people the work needs, what keeps crews from working, how to set targets a crew believes in, and how to keep the work moving through absences, handovers and hot weather.

Find the optimal crew size for a task from the quantity, the open work fronts and the supervision it needs, and spot when extra people slow it.

Turn the look-ahead into a weekly labour plan by trade, set it against the crews you have, and close each shortfall two weeks before it arrives.

Use work sampling on one shift to see how much crew time goes to waiting, walking and fetching, then fix the biggest cause and measure again.

Stage each crew's material, fasteners and tools at its work area before the shift, from a daily kit list, so crews start work instead of fetching it.

Run a first-run study on a repetitive task: time each step, improve the method with the crew and set the production rate from the improved runs.

Plan for crew absenteeism before it happens: map who holds each critical skill, qualify backups and replan in ten minutes when someone is out.

Give each new worker a site orientation that sticks: the hazards, rules and people to ask, a walk of the site, the first task shown and a signed record.

Track construction rework by coding the hours with a cause, totalling them every week and fixing the causes that cost the most hours first.

Run a shift handover that passes partly finished work to the next crew with a short note and a walk of the work, so nothing is lost, repeated or left unsafe.

Set a daily production target with your crew from the rate it has reached and today's conditions, post it, check it at 15:00 and record why a day falls short.

Cut construction equipment downtime: track hours and pre-use checks, act on reported defects, service machines in planned gaps and keep a fallback ready.

Count the remobilization cost of pulling a crew off site and back, from trips and set-up to slower first days, decide whether to leave, and record it.

Get a weekly subcontractor manpower commitment from each trade, count its workers on site every day, and raise any shortfall the same week.

Prepare a one-page construction work package for each crew task, with scope, current drawings, materials, bookings, checks and hazards, so no one stops to ask.

Write a construction heat stress plan: measure heat at the work, move heavy work to cool hours, add water, shade and rest, and watch for symptoms.
Cost control
Tracking labour productivity with installed quantitiesCost control
Spotting labour overruns earlyCost control
Overtime decisions: when paying more saves the jobCost control
Standby and idle time: recording it so it can be recovered