Lost-Case Scoring: Quantifying the Cases You Leave on the Table
Every late start, slow turnover, and empty block is a case you could have done. Lost-case scoring turns wasted OR minutes into a number surgeons and CFOs can act on.
Most OR inefficiency hides in plain sight. A late start, a slow turnover, an empty Thursday block — each is small, each has a reason, and none of them shows up as the thing it actually is: a case you could have done and didn't. That missing case is invisible because it never got scheduled. Lost-case scoring is a way to make it visible — to roll scattered wasted minutes up into a single number that a surgeon, a CFO, and a charge nurse can all act on. This post explains the idea and how ORbit implements it.
The case you didn't do is invisible — until you measure it
Efficiency metrics usually report what did happen: utilization was 71 percent, turnover averaged 34 minutes, FCOTS was 78 percent. Useful, but each is a fragment, and none names the consequence. The consequence of all of them together is forgone throughput — surgical capacity you staffed and paid for but never converted into a case.
Because that lost case was never booked, it leaves no trace in any report. Lost-case scoring exists to give it one.
The inputs: late starts + turnovers + unfilled block + cancellations
Lost-case scoring is a composite. It draws on the same four leak points that drive the cost of OR time, expressed as recoverable minutes:
- Late first-case starts — minutes lost at the front of the day that compound downstream. (FCOTS guide.)
- Slow turnovers — the recoverable portion of the gap between cases, especially the outliers. (Reducing turnover.)
- Unfilled block time — allocated capacity that went unused. (Reclaiming block time.)
- Day-of-surgery cancellations — staffed time stranded too late to backfill. (Cost of cancellations.)
An estimate, by design
Lost-case scoring is a directional model, not a general-ledger figure. Not every wasted minute is truly recoverable — some variation is irreducible, and you would never want to run a room at 100 percent. The point is to size the opportunity and rank where to act, not to bill anyone for the gap. Treat it as a compass, not an invoice.
Converting wasted minutes into "cases left on the table"
The translation is deliberately simple: total the recoverable wasted minutes over a period, then divide by a representative case-plus-turnover time for the service line. If a service line loses, say, 400 recoverable minutes in a week and its typical case-plus-turnover runs about 100 minutes, that is roughly four cases the week could have absorbed — without adding a single block hour or staff member.
The honesty of the number depends entirely on the honesty of its inputs, which is why it has to be built on consistent, median-based measurement rather than cherry-picked averages — the same discipline behind every metric in the OR efficiency metrics that actually matter.
Why this reframes efficiency for surgeon and CFO audiences
The quiet superpower of lost-case scoring is that it speaks every dialect in the building. Tell a surgeon their service line is leaving "about two cases a week on the table" and you have their attention in a way that "utilization is 71 percent" never achieves. Translate those cases into contribution margin and the CFO is engaged. Trace them back to minutes and the charge nurse knows exactly which turnovers and starts to attack.
One number, three audiences, no translation lost in the handoff. That alignment — getting the surgeon and the CFO to look at the same number and agree on it — is often worth more than the raw efficiency gain.
How ORbit's lost-case score works
ORbit computes a lost-case score from your real case data: it measures the four leak points continuously, applies median-based, facility-scoped logic so a single outlier never distorts the result, and expresses the total as cases left on the table — by surgeon, service line, and room. It is deliberately conservative about what counts as "recoverable," because a number people can dismiss as inflated is a number that changes nothing.
The result is a single, defensible figure that turns a pile of scattered inefficiencies into a prioritized opportunity — and a shared language for the people who have to fix it. To see your own lost-case score on your own data, book a walkthrough.
Frequently asked questions
What is lost-case scoring?
Lost-case scoring is a way of converting scattered wasted OR minutes — from late starts, slow turnovers, unfilled block, and cancellations — into a single, intuitive number: roughly how many additional cases you could have performed with the capacity you already paid for. It reframes efficiency from abstract percentages into cases left on the table.
How is a lost case calculated?
Conceptually, you total the recoverable wasted minutes across the day, then divide by a representative case-plus-turnover duration for the service line. The result estimates the cases that the wasted time could have accommodated. It is an estimate meant to direct attention and prioritization, not a precise accounting figure.
Why express wasted OR time as lost cases instead of minutes or dollars?
Because different audiences act on different units. A surgeon responds to "two more cases a week," a CFO to the contribution margin those cases represent, and a charge nurse to the minutes behind them. Lost-case scoring is a translation layer that lets one number speak to all three.