Line-Side & Sequencing Racks: JIT/JIS Delivery for Auto Assembly
Line-side and sequencing racks present the right part, in the right order, within arm's reach of the operator. JIT delivers the correct part just in time; JIS presents parts in the exact vehicle build order — cutting walking, searching and wrong-part errors.
Line-side and sequencing racks deliver the right part, in the right order, within easy reach of the assembly operator — the physical backbone of Just-in-Time (JIT) and Just-in-Sequence (JIS) production. Good line-side design cuts walking, searching and errors, which directly lifts throughput.
JIT vs JIS — what's the difference?
| JIT (Just-in-Time) | JIS (Just-in-Sequence) | |
|---|---|---|
| Delivers | Right part, right quantity, right time | Right part, in the exact build order |
| Rack role | Buffer the correct SKU line-side | Present parts in vehicle sequence |
| Best for | High-usage common parts | High-variety / model-specific parts |
Design principles for line-side racks
- Present, don't store — angle shelves and flow lanes so the next part faces the operator.
- Golden-zone ergonomics — keep frequent picks between knee and shoulder height to reduce strain, following OSHA ergonomics guidance.
- FIFO flow — gravity flow lanes rotate stock and keep sequence intact.
- Compact footprint — narrow, mobile racks free up valuable line space.
- Mobility — casters or tugger bases so racks cycle to and from the line.
Why it pays off
Line-side and sequencing racks are a core lean-logistics tool — the Lean Enterprise Institute ties this kind of point-of-use presentation to less walking, fewer errors and smoother flow. In practice that means faster takt, less line-side inventory and fewer wrong-part fits.
Build the right line-side solution
HAOFU designs mobile line-side and sequencing racks around your parts, takt and layout — often paired with tugger trolleys and automotive parts racks. Tell us your line and we will design a presentation that fits your flow.
See a space-saving parts rack in our smart storage solution video.
Frequently Asked Questions
- What is the difference between JIT and JIS?
- Just-in-Time (JIT) delivers the right part, quantity and time to the line. Just-in-Sequence (JIS) goes further and presents parts in the exact order vehicles are built. JIT suits high-usage common parts; JIS suits high-variety, model-specific parts.
- What is a sequencing rack?
- A sequencing rack holds parts in the precise build order they will be fitted, so operators pick the next part without sorting or searching. It is the physical enabler of just-in-sequence delivery on a mixed-model assembly line.
- How do line-side racks improve efficiency?
- By presenting the next part within arm's reach, in the right order, they cut walking, searching and wrong-part errors. That reduces line-side inventory, smooths flow and helps maintain takt time.
- Should line-side racks be mobile?
- Usually yes. Casters or tugger bases let racks cycle to and from the line for replenishment, keep footprints small, and support milk-run / tugger-train replenishment instead of forklifts at the line.
