4D Simulation

Rehearse the build. Then improve it.

Crane reach, delivery windows, temporary works, the week the facade meets the scaffold — every one of those is a decision, and every one is cheaper to get wrong in a simulation than on site.

Run the sequence Talk about a tender
Used for
Tenders · methodology · logistics
Built from
BIM + the live programme
Delivered
Before the first pour
Scroll — week 00

We don't document the schedule. We improve it.

A construction animation shows you the plan you already have. A planning-driven simulation tells you the plan is wrong in week 34 — while there is still time and no money spent.

The console

Drag the programme. Watch the site answer.

This is the working shape of every study we deliver: the sequence on one side, the numbers that move with it on the other. Drag the week, or let it run.

Programme week
WK 00
Current activity
Enabling works
Cash out 0% of contract value
Substructure0%
Core & frame0%
Envelope0%
Fit-out0%
Sequence check4D
Enabling
Substructure
Core
Envelope
MEP
Fit-out
Commissioning

Bars in solid red sit on the critical path. Move one and the simulation re-sequences everything downstream of it — which is the whole reason to build the model before the programme is frozen.

Core philosophy

Every simulation is built to answer a question that is still open.

If a study cannot change a decision, we don't make it. The work below exists because someone needed an answer before committing to a method, a crane, a price, or a bid.

Construction animation

  • Made after the programme is fixed
  • Illustrates the intended sequence
  • Judged on how it looks
  • Owned by marketing
  • Re-cut when the plan changes
  • Answers: what will it look like?

Planning-driven 4D

  • Made while the programme is still open
  • Tests whether the sequence is possible
  • Judged on the decisions it changes
  • Owned by planning and methods
  • Re-run when the plan changes — in hours
  • Answers: will this actually work?
01

Tender simulations

The method statement, made watchable — so an evaluator sees the thinking instead of reading about it.

02

Bid support

Sequence, resource curve and site setup aligned to the price you are actually submitting.

03

Construction methodology

Competing methods modelled side by side and compared on duration, risk and cost.

04

Execution strategy

Zoning, phasing, work fronts and hand-back — the shape of how the job will actually be run.

05

Construction logistics

Gate capacity, delivery windows, laydown, hoisting strategy, traffic management, waste routes.

06

Crane studies

Reach, radius, load charts, over-sail, tandem lifts, climbing sequence and dismantling.

07

Site planning

Compound layout evolving by phase, not one drawing pinned to the wall for two years.

08

Temporary works

Falsework, propping, edge protection and access modelled in time with the permanent works.

09

Planning optimization

Float found and re-spent where it earns something, instead of sitting at the end of the bar.

10

Sequence validation

Every activity checked against the space, the access and the trade it hands over to.

Why early 4D matters

The cheapest week to fix a programme is the one before it is signed.

Every issue found in simulation is an issue not found by a foreman with forty people standing behind him.

01

Detecting planning issues early

Space, access and trade-stacking conflicts surface as soon as the sequence is modelled — not on the day two crews arrive at the same slab.

02

Reducing construction risk

The high-consequence moves — heavy lifts, road closures, tie-ins, diversions — are rehearsed until the method is boring.

03

Improving communication

One shared picture that a client, a planner, a site manager and a subcontractor all read the same way.

04

Winning tenders

Evaluators score the method statement they understood. A sequence they can watch is worth more than a page they skim.

05

Supporting client presentations

Board approvals, stakeholder consultations, neighbour engagement — all easier when the impact is visible in time.

06

Supporting project management

The simulation becomes the baseline that progress is measured against, week by week.

07

Optimizing construction methods

Precast against in-situ, top-down against bottom-up, two cranes against three — decided on modelled evidence.

08

Visual decision making

Options presented as a comparison anyone in the room can judge, in the meeting where it gets decided.

Crane envelope and delivery route. Modelled per phase, because the compound in week 12 is not the compound in week 60. Slot · live diagram
0%Of clashes we find are sequence, not geometry
0wkTypical float recovered on a first pass

Construction intelligence

The simulation is only as good as what it is wired to.

Six inputs, one model. Change any of them and the sequence, the curve and the site plan all move together.

BIM

Revit and IFC models arrive with the element breakdown the programme needs — by zone, by level, by pour, by trade. Where they don't, we build the breakdown; that mapping is most of the work and all of the value.

Model integritySYNCED
0Elements mapped
0Programme activities linked
0wkSimulated duration
0Methods compared

Showcase

Seven kinds of study, one way of working.

Each frame below is a slot waiting for the real project. The layout does not change when it arrives.

Tender animation. The submission cut, timed to the evaluator's attention span.Slot · video
Tower crane studies. Reach and interference tested against the real programme.Slot · live diagram
Logistics simulation. Delivery windows against site capacity, week by week.Slot · video
Equipment sequencing. What is on site, when, and what it is standing on.Slot · still
Infrastructure simulation. Staged closures, diversions and possessions.Slot · video
High-rise construction. Floor cycle, jump form, hoisting strategy.Slot · .glb
Industrial facilities. Shutdowns, tie-ins and phased commissioning, where a day of overrun is priced in production, not liquidated damages. Slot · full-bleed video

Bring us the programme you are not sure about.

A model and a schedule are enough to start. The first thing you get back is a list of the weeks that will not work.

Start a simulation See how design feeds it