Turnaround time: where the days actually go in a dental lab
Labs try to speed up the bench, and the bench is rarely the problem. The days are lost waiting: for an instruction, for a decision, for the courier.
Engineering·22 August 2026·6 min read
Every lab owner has tried to make the lab faster. Usually that means pressure on technicians, occasionally a new machine, sometimes overtime at month end.
Measure it properly and the picture changes. The bench is rarely where the days go.
Measure elapsed time, then split it
Total turnaround is received to dispatched in working days. Useful, but only as a scoreboard. The actionable version is the time between each stage transition.
Do that for a month and the pattern is nearly always the same: hours of work spread across days of waiting.
The four common queues
- Intake. Cases that arrive incomplete and wait for a clarification nobody has chased.
- Specialist skill. Everything of one type queues behind one technician who does it.
- Batching. Casting or firing waits for a full load, which is efficient for the machine and expensive for the case.
- Dispatch. Finished work waiting for the next delivery run, sometimes for a full day.
Fix intake first, it is free
Cases that arrive without a shade, without clear tooth numbers or with an unusable impression stop before they start, and that wait is usually invisible because the case has not officially entered production.
Requiring complete information at submission, through a portal or a standard form, removes the largest queue in most labs without changing anything on the bench. It is the same argument as in the dentist portal that ends the status call.
Plan the day from the due list
Labs that plan from a due today and due tomorrow view, sorted by stage, spend the morning deciding and the rest of the day working. Labs without it discover their priorities when a clinic calls.
Cross training is the other half. Every skill that only one person has is a permanent queue with a holiday risk attached.
Be honest about batching
Batching is genuinely efficient for equipment and genuinely expensive for elapsed time. That trade off is a business decision, not a technical one, and it should be made deliberately per work type rather than by habit.
For rush cases, decide in advance what you are willing to do differently and what it costs, so the answer is a policy rather than a favour negotiated each time.
Make the measurement automatic
None of this survives as a manual exercise. DLMS records each stage transition as work moves, so stage times and turnaround come out of normal production rather than a special study, and the due list is a screen rather than a reading of the register.
Faster labs are not the ones whose technicians work faster. They are the ones where cases stop waiting: complete on arrival, planned from a due list, and dispatched without sitting on a shelf.
Frequently asked questions
How do you measure turnaround time properly?
From received to dispatched, in working days, per work type, and then broken down by stage. The single overall number tells you whether you are getting better; the stage breakdown tells you where to act. Without the breakdown, labs optimise the stage that is easiest to see rather than the one that is slow.
Why is waiting time bigger than working time?
Because most stages take hours and most cases sit for days between them: waiting for a clarification, waiting for a batch to fill, waiting for the technician who does that work, waiting for a dispatch run. In most labs the majority of elapsed time is queueing, not production.
Should labs promise shorter turnaround to win clinics?
Only if the promise is reliable. Clinics book patients against your date, so a lab that consistently delivers in five days beats one that sometimes manages three and sometimes seven. Predictability wins accounts and keeps them.