Layout is where the process meets the building. A layout that works on a drawing can fail on the floor because an operator cannot reach a station, a forklift cannot pass, or a column is in the wrong place.
Key takeaways
- The layout form should follow the process and the building, not the other way round.
- U-shaped and loop layouts reduce walking and improve supervision.
- Straight lines are simple but require long, unobstructed floor space.
- Always check maintenance access and emergency egress.
1. Straight line
The simplest form. The product enters at one end and leaves at the other. It is easy to control and easy to expand by adding stations at the end. It requires a long, clear floor and makes supervision difficult if the line is longer than about 20 metres.
Best for: high-volume, low-mix production with a stable process and a long bay.
2. L-shape
Two straight sections at 90°. It fits a corner and can separate two processes, such as assembly and test. The corner needs a transfer or a curve, which adds cost and a potential jam point.
Best for: buildings with a corner available and a process that changes direction.
3. U-shape
The line goes out and comes back, with the start and end close together. It reduces walking, allows one operator to cover both sides, and puts the line leader in the middle. It requires a wider bay but less length.
Best for: manual assembly with shared tools and a need for supervision.
4. Loop
The carrier returns to the start on a continuous loop. It is common for overhead conveyors and for lines with carrier return. It requires a return path and a transfer at each end.
Best for: overhead lines, paint lines and processes where the carrier must return.
| Form | Floor shape | Walking | Expansion | Typical use |
|---|---|---|---|---|
| Straight | Long, narrow | High | Easy at end | High volume, low mix |
| L | Corner | Medium | Moderate | Two-stage process |
| U | Wide | Low | Moderate | Manual assembly |
| Loop | Square | Low | Moderate | Overhead, carrier return |
| Spine | Long with branches | Medium | Easy | Multiple product families |
| Cell | Compact | Low | Difficult | Low volume, high mix |
5. Spine with branches
A main conveyor with branch lines feeding or leaving it. It is common in logistics and in plants with multiple product families. The merges and diverts are the critical points; they need gap control and priority logic.
Best for: multiple product families sharing a main transport route.
6. Cell
A compact group of stations, often U-shaped, with one or two operators. The product moves within the cell, and the cell is balanced as a unit. It is flexible but difficult to expand.
Best for: low volume, high mix, and products that need several processes close together.
Choosing the form
Start with the process flow and the building. If the bay is long and narrow, a straight line is the natural choice. If the bay is wide, a U-shape may reduce walking. If the product must return, a loop is necessary. If the mix is high and the volume low, a cell is better than a long line.
Then check the constraints: columns, doors, aisles, maintenance access and future expansion. A layout that ignores a column will be rebuilt on site.
Frequently asked questions
Which layout is best for a small factory?
A U-shape or a cell, because both use floor space efficiently and reduce walking. A straight line may not fit.
Can a straight line be converted to a U-shape later?
Yes, if the conveyor is modular and the floor space allows. It is easier to plan the U-shape from the start.
How wide should the aisle be?
At least 1.2 metres for a person, 2.5–3 metres for a forklift. Check the local safety requirement.
Send your building plan and process flow to our engineers through the contact page; we will propose a layout and check the constraints.
