Guides
Print shop operations and workflow: what the experienced already know
Print shop workflow from order to dock: the eight handoffs a job passes through, the two constraints that set delivery dates, and where work actually waits.
What to take away
- A job does not move through a shop. It waits, in eight places, and the waiting is where the delivery date is decided.
- There are two constraints, not one. Press hours are visible and everyone plans around them. Finishing is invisible and is usually the real limit.
- The promise date starts at proof approval, not at order. Anything else makes your schedule a hostage to the customer's decision-making.
- Every handoff needs one thing written downwhat the receiving stage needs in order to start without asking a question.
- Measure queues, not utilization. A stage that is busy is not the same as a stage that is holding everything up.
The eight places a job waits
- Order intakethe job waits on the customer to confirm specification, stock and quantity.
- Proof approvalthe job waits for a signature or a written go-ahead.
- Preflight and file correctionthe job waits on missing bleed, a wrong color space or fonts that were never supplied.
- Plate making and imposition outputthe job waits for its plates.
- Press queuethe job waits for a slot on the right press.
- Drying or conditioningink, coating and paper need time before the next step.
- Finishing queuecutting, folding and binding, each with its own wait.
- Packing and shippingthe job waits on a final count, a carton and a carrier collection.
Eight places a job waits
- Waiting for the file
- Waiting in prepress
- Waiting for approval
- Waiting for stock
- Waiting for the press
- Waiting for finishing
- Waiting for hand work and packing
- Waiting to ship
Write these on a board and put today's jobs on it. Most shops discover their board is not evenly loaded: two of the eight hold nearly everything.
The two constraints
- Press capacityhours on the presses, the limit owners buy and plan around.
- Finishingcutting, folding, binding and packing, and usually the limit that decides delivery dates.
Press vs finishing constraint
Press capacity
- Speed
- Large volume quickly
- Sequence
- Single operation
- Machines
- Often multiple
- Delivery impact
- Clears job in afternoon
- Constraint role
- Owners buy it
Finishing
- Speed
- Slower per piece
- Sequence
- Frequently sequential
- Machines
- May have exactly one
- Delivery impact
- Can need two days
- Constraint role
- Decides delivery dates
The reason is structural. A press turns a large volume of sheets quickly. Finishing operations are slower per piece, are frequently sequential, and each one may have exactly one machine. A press can clear a job in an afternoon and hand it to a folder that needs two days, and no schedule based on press hours shows that.
The test is simple and worth running for a month. Each day, note which stage has printed or unprinted work standing in front of it. Whichever one has the queue is the constraint.
Then judge every job by contribution per minute of that stage, not per minute of the press, and buy capacity there rather than where it feels short.
The constraint moves. It moves with the job mix, with the season and with staffing. Re-check it quarterly rather than assuming last year's answer.
The handoffs, and what each one needs
A handoff fails when the receiving stage has to ask a question. Define what each one needs in order to start.
Handoff requirements
- Sales to prepresscomplete specification
- Prepress to pressimposition, plates, proof, stock
- Press to finishingsheet count, grain, dimensions
- Finishing to packingcount, format, labels, split
- Packing to shippingaddress, contact, carrier, time
| Handoff | What must arrive with the job | The usual failure |
|---|---|---|
| Sales to prepress | Specification complete: flat and folded size, stock, colors each side, finishing, quantity, due date basis | Folded size missing, stock named vaguely |
| Prepress to press | Imposition, plates or file, proof reference, stock and lot identified | Approval assumed rather than recorded |
| Press to finishing | Sheet count including overs, folding grain, any critical dimension | Overs not run, so a bindery loss ends the job short |
| Finishing to packing | Count, packing format, label requirements, delivery split | Packing format decided at the last moment |
| Packing to shipping | Address, contact, carrier, collection time | An address that was never confirmed |
Each row is a short list, and each one is worth being on the job ticket rather than in a conversation. The specification half of that starts at the quote, which is why what a quote has to say and assume is a workflow document as much as a commercial one.
The approved proof is the whole defense
When a finished job is rejected, one record decides the outcome.
Three proof types
Hard copy proof
- Checks content
- Yes
- Checks position
- Yes
- Checks color
- Yes
- Risk covered
- Content and position
Contract proof
- Checks content
- Yes
- Checks position
- Yes
- Checks color
- Yes
- Risk covered
- Color and content
Screen view
- Checks content
- Yes
- Checks position
- Yes
- Checks color
- No
- Risk covered
- Content only
Define what a proof is in your shop and stay consistent. A hard copy proof, a contract proof from the press, and a screen view are three different things, covering three different risks.
A screen view on an uncalibrated monitor checks content and position, but it does not check color. Saying that before the job runs is far easier than saying it afterward.
Record the approval: who approved, what they were looking at, and when, and keep that artifact with the job. When a customer says the color is wrong, the conversation is about one document rather than two memories.
Color between two runs of the same job months apart is the hardest case. Stock comes in lots, lots vary, and both runs can match the proof while looking different side by side.
State the tolerance you work to and the standard your measurement follows. Check the current wording of ISO 12647-2, the offset process control standard from the International Organization for Standardization, and the GRACoL and SWOP specifications from Idealliance. Put it in your terms of sale, with a qualified adviser reviewing the wording.
Where files go wrong, and what to do about it
Three faults account for most prepress time on customer-supplied artwork: a document built in the wrong color space, no bleed where the piece trims to the edge, and fonts that were never supplied or outlined.
Handle them as a process rather than a favor.
Prepress fault handling
- Preflight everything on arrival
- Report faults same day
- Quote prepress separately with allowance
- Send plain file preparation note
- Do not silently fix and proceed
Fonts also carry rights questions. A font supplied to you is not automatically a font you are licensed to use, and neither is the customer's assurance that the artwork is theirs to print. What your terms should say about supplied artwork and who carries that risk is a question for a qualified adviser rather than for a template.
Rush work and what it costs
A rush job does not arrive in spare time. It displaces scheduled work, adds a changeover nobody planned, and puts three other promises at risk.
A rush uplift of 25 to 50 percent above the standard price is a typical range in commercial shops, and the right number depends on the scheduled work the job displaces.
Spoilage follows the same logic. An overs allowance of 3 to 5 percent is typical for a straightforward offset run, and higher where a job passes through several finishing steps.
Price it against what it displaced rather than at a flat uplift, and decide in advance how many you will take in a week. A shop that never refuses one has made its schedule a queue of exceptions, and the customers who booked properly are the ones paying for it.
The sequencing question underneath this is real: jobs grouped by stock and color run with shorter makereadies, and every rush insertion breaks a group. Stock lead times bound the same decision, which is covered in how material is bought and how long it takes to arrive.
Safety and the parts of the workflow that are governed
Operations and safety are the same conversation on a production floor.
Machine guarding, energy isolation before maintenance and hazard communication are governed, not discretionary. Start with OSHA's printing industry pages. The hazard communication standard explains how chemical information reaches the people who use it.
Solvent handling, waste disposal and any ventilation or permit question belong to your state environmental agency, for your specific process and site. The wider map of who governs what is in the regulators a print shop answers to.
Staffing the stages is the other half. Every machine needs a trained second operator before it can carry a delivery promise, and local wage references for press, prepress and bindery roles are published in the occupational wage tables. The machines and their setup requirements are covered in what each press and finishing line commits you to.
The records that make the workflow improvable
Keep three things and the shop can correct itself.
Job tickets with quoted against actual, for time and for sheets. Spoilage by cause. And a note of where each job waited longest. Those three turn arguments into arithmetic, and they are ordinary business records of the kind described in the IRS guidance on record keeping.
What the shop sells shapes all of it, because a menu full of short-run, heavily finished work is a different building from one running long, simple jobs. That decision is set out in the services a shop chooses to offer, and the demand behind it in reading the trade area.
Common questions
How do I stop the schedule slipping every week?
Start the clock at proof approval and hold to it. Most chronic slippage is not a production problem; it is a schedule that promised dates before the customer had approved anything.
Should the shop run a formal production meeting?
A short one at the same time every day, standing, looking at the board. Long weekly meetings discuss jobs that already went wrong.
How many jobs should be in progress at once?
Fewer than feels comfortable. Work released faster than the constraint can absorb does not get done sooner, it just becomes a longer queue with worse visibility.
What is the single most useful change for a small shop?
Preflight on arrival. It moves the most common delay out of the schedule and into the first hour, where it can still be fixed without costing a promise.
