Press scheduling works best when similar jobs — same inks, same substrate, same size — run back to back, cutting the make-ready between them while still meeting every due date. A good schedule respects real press and finishing capacity, and can be re-planned in seconds when a rush job or breakdown hits, rather than patched by hand.
- Sequence similar jobs together — same colours, substrate and size — to cut changeovers.
- A schedule must respect real limits: press capacity, plates, ink, finishing and due dates.
- Whiteboard schedules break when a rush job lands; optimised ones re-plan in seconds.
- Fewer changeovers mean more sellable press hours without buying another press.
What is press scheduling?
Press scheduling decides which job runs on which press, and in what order. It sounds simple, but every choice has a cost. Moving from one set of colours to another means washing up and re-inking. Switching substrate — the paper, board or film being printed — means new settings and test sheets. That set-up time, called make-ready, earns nothing.
So the order of jobs decides how much of each shift goes on set-up and how much on sellable print.
Why whiteboard scheduling breaks down
Most schedules are built by an experienced planner on a whiteboard or spreadsheet. That works until something changes: a rush job arrives, a plate is late, a press goes down. Re-planning by hand takes an hour, so planners patch the gap instead. The patch adds extra changeovers, and a due date slips somewhere else — often unnoticed until the customer calls.
How to sequence print jobs to cut make-ready
Group jobs that share inks, substrate, sheet size or cutting die, so each changeover is small. Order colours from light to dark where the process allows, so wash-ups are quicker. Match each job to the press that suits it best, not just the next free one. Then check the result against due dates — the cheapest sequence is no use if it ships late.
Re-planning when a rush job lands
An optimising scheduler treats the plan as a puzzle with rules: capacity, due dates, finishing limits and changeover costs. When something changes, it re-solves the whole puzzle in seconds and shows what moves and why. The planner stays in charge and approves the change. Owllys works this way, re-sequencing across presses so a rush job fits without breaking other promises.
One week on three presses: manual vs optimised schedule
Illustrative example.
How to start optimising your press schedule
- 01Capture the constraintsList each press’s sizes, colours, substrates and speeds, plus finishing capacity and plate lead times.
- 02Measure changeover timesRecord how long each type of changeover really takes: colour, substrate, size or die.
- 03Group and sequenceBatch similar jobs and order them so each changeover is as small as possible.
- 04Check against due datesConfirm every job still ships on time; trade a little make-ready for a promise if needed.
- 05Re-plan on every changeWhen a rush job or breakdown hits, re-run the whole schedule instead of patching it.
Questions leaders ask
What is the difference between press scheduling and production planning?
Production planning decides what work the plant takes on and roughly when, usually over weeks. Press scheduling turns that plan into an exact sequence of jobs on specific presses, hour by hour. Planning sets the volume; scheduling decides how efficiently each press uses its time.
How much make-ready can better scheduling save?
It depends on your job mix. Shops running many short jobs in varied colours and substrates usually gain most, because every avoided changeover frees press time. The surest way to know is to compare a few weeks of actual changeovers with what a grouped sequence would have needed.
Can scheduling software handle rush jobs?
Yes — that is where it helps most. An optimising scheduler re-sequences every press within seconds when a rush job arrives, shows which jobs move and whether any due date is at risk, and lets the planner approve or adjust before the new plan is published.