Lean Construction Singapore: The Waiting You Never Recorded

Joseph, Co-founder

Manpower stay idle while coordination team walks site and discuss

Image Credit:

Otus.build

BCA’s LIFT initiative starts this month. About 30 built environment firms will each get six months of lean construction coaching from Boston Consulting Group, including coaching on live Singapore projects to find waiting and rework. The coaching will get the attention. Whether those six months change anything on site depends on something most project teams don’t have ready when the coach walks in on day one.

What LIFT gives a firm

Minister for National Development Chee Hong Tat announced Lean Implementation and Field Transformation (LIFT) at the SCAL Annual Dinner on 16 October 2026. BCA and the Skills and Workforce Development Agency (SWDA) run it, with support from SCAL. The Straits Times reported on 16 October that about 30 firms are expected to take part over two years, starting in November, and that contractors, subcontractors, developers and design consultancies can join.

Item	What the announcement says
Coaching	Six months of workforce consultancy from BCG per firm: training, workshops and coaching on live projects
Focus	How equipment is deployed, how teams coordinate, how submissions and workflows can be simplified
Job redesign funding	Up to 70% of job redesign costs through SWDA’s Workforce Development Grant
Reskilling support	Up to 90% salary support for three months through the Career Conversion Programme
How to join	Register interest on BCG’s LIFT website, per BCA

For a site team, the part that matters is the coaching on live projects. Some of those six months will be spent at your work fronts with your PM and site engineers, asking where the time went last week.

Lean construction starts with seeing the waste

Lean has a fixed list of what it hunts for. BCG’s March 2026 article on lean construction sets out eight wastes. Waiting is defined there as idle time from delayed approvals, missing materials or unavailable crews.

The Minister’s own example was Gammon Singapore. On one infrastructure project, the team planned backwards from milestones with its supply chain and subcontractors, and ran regular “waste walks” to spot waiting, idle manpower and slow processes. The speech says this cut weeks of delay across several milestones and avoided costly rework. The Minister put the point plainly: “Lean construction is not about asking people to work faster.”

So the method is to find the hours lost between tasks. That’s where most Singapore site records come up short.

Site records show finished work, not lost time

Site photo documentation on most projects is built for two jobs. One is proving work was done, for progress claims under the SOP Act. The other is proving compliance at inspections. Neither job needs a record of what didn’t happen.

Take a typical day. A formwork gang waits on an RFI reply. A precast delivery sits at the gate because the crane is booked. Two M&E workers stand at a ceiling that the drywall crew hasn’t closed. The daily report says manpower 42, weather fine, slab pour Level 9 done. The progress photo shows a finished slab.

None of the waiting made it into the record. When the lean coach asks where the time went, the team answers from memory, and memory is generous to whoever is talking. A month of the six-month programme can go on rebuilding a picture that a few weeks of deliberate capture would have shown.

My view: the firms that get the most from LIFT won’t be the ones with the most lean training. They’ll be the ones that walk in with two to four weeks of dated, located evidence of waiting and rework on one work front.

What the numbers say about waste

Figure	Source and date	What it means on site
Rework is roughly 4% to 6% of contract value on many projects	AXA XL, cited by BCG, March 2026	On a S$20 million contract, that is S$800,000 to S$1.2 million spent doing work twice
Lean can save roughly 10% to 15% on many activities or tasks	BCG, March 2026	The saving is per activity. You need to know which activities lose time before you can pick one
Local firms using lean reported productivity gains of up to 30%	BCA speech, 16 October 2026	“Up to” is the ceiling. Where your firm lands depends on how clearly you can see your starting point
Construction contracts awarded last year exceeded S$50 billion, up 13.5%	Speech by MOS Alvin Tan at SWITCH, 28 October 2026	More work for the same constrained workforce. An idle crew-hour costs more when there’s no spare crew

Rework is the easiest waste to record because it leaves a physical trace. Waiting leaves nothing behind unless someone captures it at the time.

Turn each waste into something you can capture

A waste walk needs a record format before it needs a coach. Here is how BCG’s eight wastes translate into what a site engineer can capture on a walk.

Waste	What to capture on the walk	What to note
Waiting	Idle crew at a work front, a stopped hoist, a delivery parked at the gate	Time, location, trade, cause (approval, material, crew, equipment)
Defects	The defect before rectification	Trade responsible, owner, date closed
Transportation	Material moved twice, laydown far from the work front	Where it came from and where it should have been
Inventory	Materials stacked at a level weeks ahead of use	Delivery date against install date
Motion	Workers walking long distances for tools or water	Distance, how often
Overproduction	Precast or rebar cages made too early and stored on site	Date made, date installed
Extra processing	Duplicate forms, repeat approvals, retyped reports	Steps and hours, not photos
Unused talent	Engineers typing up reports after the shift	Admin hours per week

Keep the walk short and fixed. Same route, same two times a day, same person if you can. The point is a comparable record over four weeks, not a full survey. If you already do a daily walk, recording site walk photos on plan gives each photo a location without extra typing.

What to do this week

Register interest through BCG’s LIFT website, as directed in the BCA speech, and check with SWDA whether your firm qualifies for the Workforce Development Grant.
Pick one live project and one repeating work front, such as a typical floor cycle, for a four-week baseline.
Add a “waiting” line to your daily site reporting: trade, crew size, hours lost, cause.
Walk that work front twice a day and photograph every idle crew, blocked access and parked delivery, with time and location.
Log every rework item as an issue with a named owner, so you can count them by trade after four weeks. The habits that prevent costly rework apply here too.
Agree four or five cause codes with your subcontractor supervisors, so everyone tags waiting the same way.

Where Otus fits

Otus is built for this kind of walk. Photos pin to the plan with the direction the camera faced, so “idle crew, grid C/4, Level 9, 10:40” is captured in one shot. Capture works offline in basements and lift cores and syncs on reconnect. Foremen can describe the cause in their own language and AI voice transcription fills the form. Rework goes in as an issue assigned to the subcontractor, who closes it when it’s done. Filter by author and AI visual search make four weeks of photos easy to sort, and PDF or PowerPoint reports for the coach take under 5 minutes. Seats are unlimited per project, so subcontractor supervisors can capture too.

Teams using Otus find photos 94% faster and recover 60 to 90 admin hours a month. Start your baseline at app.otus.build.

FAQ

What is BCA’s LIFT initiative?

LIFT (Lean Implementation and Field Transformation) is run by BCA and SWDA with SCAL’s support. About 30 built environment firms are expected to join over two years from November 2026. Each gets six months of lean coaching from Boston Consulting Group, including coaching on live projects, with SWDA grant support for job redesign and reskilling.

What is a waste walk in lean construction?

A waste walk is a regular site walk to spot the eight lean wastes: waiting, defects, transportation, inventory, motion, overproduction, extra processing and unused talent. On a Singapore site that means noting idle crews, rework, double handling and excess stock, with the time, location and cause, so patterns show up after a few weeks.

How do I record waiting time on a construction site?

Add a waiting line to the daily site report with trade, crew size, hours lost and cause. On fixed walks, photograph idle crews, stopped hoists and parked deliveries with a time stamp and plan location. Agree a short list of cause codes with subcontractor supervisors so four weeks of entries can be counted and compared.