Compact or Central Storage System? Which Solution Fits Your Carrier Mix
The choice of the right automated storage system in SMT manufacturing doesn't depend on available technology, but on what role the storage system should play in the overall material flow: a line-side buffer for a manageable set of material types, or a central supply and circulation hub for multiple lines with high mix dynamics.
The wrong question is: "How much storage do I need?" The right question is: "What role should the storage system play in the material flow?" Once that question is answered, the system decision almost makes itself.
In consulting practice, we often encounter the same starting point: an operation is growing, the carrier mix is becoming more complex, and at some point the status quo is no longer sufficient. The question then becomes: a compact, line-side system – or a central warehouse with more capacity and process structure?
At cts, we don't evaluate this decision based on capacity figures alone. What matters is the role the storage system should play in the overall material flow – and the resulting requirements for throughput, variant mix, returns, and IT integration.
The Systems in Direct Comparison
| Criterion | cts OCTA Storage | cts CUBE Storage |
|---|---|---|
| Primary Role | Line-side buffer with storage logic | Central supply and circulation hub |
| Suited for | Few lines, manageable material mix, clear supply routines | Multiple lines, high mix dynamics, many returns and carrier types |
| Access Times | Very short due to line proximity | Longer internal paths, compensated by better zone structure |
| Zone Formation | Limited – works well with homogeneous mix | Pronounced – clean separation of carrier types, returns, exception cases |
| Scalability | Modularly expandable as OCTA cluster | Designed for growth from the outset |
| Changeover Peaks | Buffers manageable peaks | More robust with high return dynamics |
| Footprint | Compact, can be positioned close to the line | More floor space required, central positioning makes more sense |
The Questions That Lead to the Decision
We don't work with gut feeling, but with a brief process and volume assessment. The following questions structure the decision in practice:
Where OCTA Works – and Where It Reaches Its Limits
OCTA Storage works very well when a clearly defined supply area needs to be efficiently organized. Formats and processes must not diverge too much. Limitations arise when many carrier types with very different return and handling logic need to be cleanly separated simultaneously – or when returns and exception cases consume too much floor space and operator time.
The difference between OCTA and CUBE usually doesn't show on the first expansion – but on the second or third. When new carrier types are added or the mix grows significantly, an OCTA risks becoming opaque through additional special rules.
Which Scenarios Point to Which System
Typical Use Cases
Few lines, manageable material mix, primary benefit in fast handovers and organized returns. High-runner areas or clear supply routines without strong changeover dynamics.
Typical Use Cases
Multiple lines with high mix dynamics, many returns, and different carrier types. Or: deliberate setup of a central hub for storage, buffer, and return flow.
Focused Alternative for Reels
Vertical storage, flexible slot management without rigid size constraints, optional MSD climate zone. Particularly useful when reels are the dominant bottleneck and no universal warehouse is needed.
Hybrid Approach
For reel-heavy SMT manufacturing: REEL Storage as a specialized module plus OCTA or CUBE for the remaining carrier mix. Each module handles the task it was designed for.
Conclusion: The System Decision Follows the Process
Neither OCTA nor CUBE is categorically the better system. The decision follows from the process: what peaks occur? How often is access needed? How much return volume is generated? Where do search times and stoppages arise? What protection requirements apply? Anyone who answers these questions soberly gets a clear answer – whether a compact line-side system is sufficient, whether a central flow hub is necessary, or whether a combination delivers the best balance of benefit, effort, and scalability.
Which System Fits Your Operation?
We analyze peaks, carrier mix, return volume, and protection requirements – and show which solution has the greatest leverage.
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