Procurement Planning and Lead Times: How Not to Miss Your Project Deadline
Lead times are the #1 risk in an interior design project. How to map lead times per category, build a procurement schedule, and use a Gantt chart to get the sofa and the rug delivered the same week.
Dora Team
Why lead times are risk #1
You can plan the budget perfectly, get the specification approved by the client in a week, and find the best suppliers — and still miss the project deadline because the Italian sofa arrives in 12 weeks and you ordered it alongside flooring that was in stock.
In 7 out of 10 projects that miss their deadline, the problem is neither budget nor client. The problem is that procurement was scheduled "from the order date" instead of "from the longest delivery."
Step 1. Map lead times per category
Before procurement starts, record an estimated lead time next to every item in the specification. Typical ranges:
- Locally produced stock furniture: 1–3 weeks
- Made-to-order local furniture: 4–8 weeks
- Appliances on request: 3–6 weeks
- Italian / German furniture: 8–14 weeks
- Custom textiles, hand-knotted rugs: 6–12 weeks
- In-stock finish materials (tile, flooring): 1–2 weeks
- Made-to-order tile: 4–8 weeks
- Designer imported lighting: 4–10 weeks
These numbers are the foundation of every further planning decision. They belong in the specification, not in the designer's head.
Step 2. Schedule backward from the longest lead time
The key principle: the order date for an item equals installation date minus lead time minus buffer.
If the sofa must be installed on October 1 and the lead time is 12 weeks, it must be ordered no later than July 7. Add one week of buffer, and in practice that means June 30. Otherwise the sofa arrives after the handover.
Build the procurement schedule from the end (project completion date) backward to today. Order the longest-lead items first, even if not every other item has been fully approved by the client yet.
Step 3. Use a Gantt chart
A list of items with dates is not yet a plan. When you have 120 items, 30 suppliers, and 4 rooms installed in sequence, you need visualization.
A Gantt chart shows where timelines overlap, where the bottlenecks are, and which items are critical for the next stage to start. For example: bathroom tile must arrive before the plumbing because it is laid before the sink is mounted. Everyone "knows" this — but they do not see it on one page.
In Excel, a Gantt is a manual cell-coloring job. In specialized platforms (Dora, Programa) it is a standard feature where every specification item automatically lands on the timeline.
Step 4. Synchronize procurement with construction work
Furniture is not installed in a flat where the walls are still being painted. Tile is not laid on a floor where electrical wiring is not yet run. Procurement has to be synchronized with the on-site work schedule:
- Rough work: tile, rough plumbing, electrical
- Finishes: paint, wallpaper, flooring, lighting
- Furniture and large decor: after finishes are complete
- Textiles, small decor: last
If the procurement Gantt is not overlaid on the construction Gantt, either your storage space is packed for a month or installers are idle, waiting.
Step 5. Build in a buffer for delays
The supplier promised 6 weeks — plan for 7. This is not pessimism, it is statistics: 10–20% delays on the stated lead time happen on most orders, especially imports. One extra week of buffer per 6 weeks of lead time is a working formula.
For critical items (anchor furniture, kitchen cabinetry), use a double buffer.
Step 6. Stay in touch with suppliers
A status of "pending" in your table is not a status. The larger the project, the more often you need to confirm timelines. For major items, confirm weekly. Suppliers rarely volunteer news of a delay — you find out three days before the planned installation if you are not asking.
Conclusion
A project without a procurement schedule is a project that finishes "whenever." A project with a Gantt chart, mapped lead times, delay buffers, and synchronization with on-site work is a project with a predictable completion date.
Invest two or three days at the start of the project to build the procurement schedule properly. It pays off in not having to call the client with the news that the sofa will arrive a month after move-in day.