In Keyline Classic, minimum and maximum dimensions (e.g. width, height, or format limits) can be defined exclusively for printing machines.
For finishing machines such as cutters, folding machines, or saddle stitchers, this restriction is intentionally not available.
🖨️ Why does this rule only apply to printing machines?
For printing machines, the format to be processed is clearly defined.
Keyline knows:
the raw sheet format
the imposition logic
the resulting print format
This allows the system to reliably validate:
Is the format within the machine’s minimum/maximum dimensions?
Does the product fit into the printable area?
Is the selected machine technically suitable?
These checks are technically unambiguous and reliable.
⚠️ The grammage can of course be defined optionally for all production resources. ⚠️
✂️ Why not for cutting, folding, or other finishing processes?
After printing, a product may:
be trimmed on different sides
be cut multiple times
pass through several finishing stages
be produced over- or under-sized
include bleed, overhangs, or safety margins
In Keyline Classic, the system does not know exactly which side is being trimmed or in which sequence finishing steps are executed.
As a result, Keyline cannot reliably determine the exact intermediate or final format after each processing step.
Therefore, the system cannot safely validate strict minimum or maximum format constraints for finishing machines.
🧠 Why this limitation makes sense
An incorrect validation would be more harmful than no validation at all:
Valid production paths could be falsely blocked
Technically feasible jobs might be marked as “not possible”
Workflows would be unnecessarily restricted
For this reason, Keyline Classic deliberately limits hard dimension validations to clearly verifiable areas — namely printing machines.
🚀 Outlook: Keyline Next
In Keyline Next, the machine and workflow logic is structured in a much more granular way.
Production resources and process steps are configured more precisely, enabling more complex dependencies and format logic to be mapped cleanly and automatically in the future.