Lean Project Delivery

If FullerHome were a real delivery operation, the project would not run as five classical planning phases but as five takts — short, clearly bounded stages with defined handover criteria, in the spirit of Lean Construction. Permits, costs and dates are part of the project structure from the start, not a risk appended later.

Site & needs analysis

Plot, utilities access, setback areas, zoning check, first rough costs.

Pull trigger: plot data

Cost structure, DIN 276 view

The live cost model from the simulation, grouped the way a German cost plan (DIN 276) groups it — reacts to the typology and budget configured on the simulation page.

KG 300/400 — Building works (shell, glazing, foundation, fit-out)€43,034 · 68.4%
KG 400 — Services core (utilities)€4,750 · 7.5%
KG 390 — Site setup (robot deployment)€10,500 · 16.7%
KG 700 — Planning & permits (8%)€4,663 · 7.4%
Total€62,947

A real public budget would add a named risk buffer (~5–8%) on top — deliberately visible as its own line, not hidden inside the items (Lean principle). Not included in the total above.

Takt plan with a visible permit buffer

Same durations as the “Simulation vs. reality” table on the About page — the striped block is the named buffer for authority queries and resubmissions, planned from day one.

Permit & procurement3–12 months
Foundation + utilities3–4 weeks
Shell (milling ∥ assembly)1–2 weeks
Envelope + windows1–2 weeks
Interior fit-out8–14 weeks

Bar lengths are indicative (range midpoints). Permit and procurement can overlap each other, but neither overlaps construction.

Pull principle

Scheduled backwards from handover

The sequence is planned from the desired opening date backwards — permits and procurement start early enough that they never become the bottleneck.

Last Planner System

Weekly release with a PPC metric

Each takt is released week by week; the Percent-Plan-Complete figure makes slippage visible immediately instead of at the end date.

Buffer management

Visible buffers, not hidden padding

Buffers for permits, weather and supply chains are named blocks of their own — not silently priced into individual tasks.

Takt planning

A steady rhythm on site

Assembly follows fixed takt times per shell ring, so robot, crew and logistics run at an even, predictable utilization.

When budget or schedule slips anyway

Overruns can rarely be avoided entirely — least of all in procedures that depend on authorities. What can be designed is a process that surfaces deviations early instead of excusing them late:

  1. Risk buffers instead of after-the-fact math. Permit and change-order buffers are priced in from day one — they are not “discovered” when a problem hits.
  2. Early warning via PPC and milestone status. Delays in permitting or fabrication show up in the weekly numbers, not at the planned completion date.
  3. Structured change orders. Extra costs from authority conditions or design changes become documented change orders (Nachträge) with cause, cost and schedule impact.
  4. Milestone-based payments. Payments attach to verified milestones — permit granted, shell complete — so client and builder share an interest in realistic dates.
  5. Early authority involvement. Pre-application meetings with the building authority are the single biggest lever against permit-stage delays for unusual shapes like a dome.

This simulation covers three simple public-building typologies — real projects are rarely that clean. For more complex buildings (schools, hospitals, mixed-use), Meile + Stein can deliver the real procurement and Lean-schedule calculation.

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