How to Start Improving Theatres Flow This Week — A Simple Approach You’re Likely Overlooking
Operating theatres are one of the most complex environments in any NHS trust — and one of the most consequential. They’re a vital source of revenue, a key driver of elective recovery, and a daily logistical challenge that involves dozens of moving parts, people and processes.
From a flow perspective, the complexity can feel overwhelming. There are morning start delays, emergency case disruptions, equipment that’s nowhere to be found, and cases that overrun. And that’s before you even open a spreadsheet.
The data available to measure theatre flow, productivity and utilisation is extensive. Session utilisation rates, case mix data, cancellation rates, first case start times — the list goes on. However, the difficulty lies in the fact that having all that data at your disposal doesn’t inherently indicate your starting point. In fact, for many theatre managers and operational leads, the sheer volume of it becomes a barrier in itself.
Picture this: you’re a manager, fed up and ready to take the initiative. Where do you begin?
In this post, I want to share a simple, practical starting point that doesn’t require a Lean Six Sigma belt or a month of your informatics department’s time. It’s an approach that engages your entire team, builds confidence in the data, and can start delivering real improvements in days and weeks — not months.
Why it’s easy to start in the wrong place
When organisations decide to tackle theatres flow, the instinct is usually to go straight for the big-ticket items — theatre utilisation rates, scheduling optimisation, workforce modelling. These are important, but they’re also enormously complex. They involve multiple stakeholders, lengthy data pulls, and often lead to analysis paralysis rather than action.
In my experience working with NHS theatres, the most effective starting point isn’t a lengthy, detailed data trawl. It’s simple, structured problem solving — starting with the basics and building from there.
Start with the data you can capture yourself
The foundation of this approach is asking each individual theatre to capture three straightforward operational data sets every single day. For example:
- Planned start time vs actual start time — Did the list start when it was supposed to? If not, why not?
- Planned end time vs actual end time — Did the list finish on time? What caused it to overrun or finish early?
- Planned number of cases vs actual number of cases — Were all scheduled cases completed? If not, what got in the way?
Wherever there’s a gap between planned and actual — a delta — you capture the reason. That’s it. No complex systems, no informatics request, no waiting weeks for a report. If your informatics team isn’t available, your team can collect this data manually using a simple template.
Getting this off the ground requires a few things: genuine stakeholder engagement, clear team communications, a well-designed template, and some training so staff know how to complete it consistently. This is not complicated, but genuine engagement from stakeholders is important. People need to understand why they’re capturing the data and feel part of the solution — not just handed another form to fill in.
Making data work for you
Once the template is live, the daily discipline is straightforward:
- Check that the data being captured is meaningful and complete
- Sense-check what you’re seeing with your operational colleagues on the ground
- Display the data somewhere visible — a whiteboard, a shared screen, a simple chart — so the entire team can see it
Visibility is key. When people doing the work manually capture data, it gains credibility that pulled reports sometimes lack. Your team can see it, question it, and trust it. That trust makes the next step possible.
From data to action
Once you have a few weeks of data, you look for themes and patterns. Which reasons come up again and again? Is it always the same theatre that starts late? Is equipment availability a recurring issue on particular days?
If the data is rich enough, a simple Pareto chart can be enormously helpful here — it quickly shows you which 20% of problems are causing 80% of your disruption.
From there, you select your biggest problem area and run a focused problem-solving session with the relevant people. This doesn’t need to be a formal QI event. A structured conversation, the right people in the room, and a clear action plan is enough to get started.
Categorise your actions into three groups:
- JDIs (just do it) — things you can fix this week with minimal effort
- Simple fixes — actions that need a little coordination but are straightforward
- Needs planning — issues that require more planning, resource or escalation
This approach offers the power to implement quick wins almost immediately. Within days, you can start seeing the impact. That builds momentum, engages the team, and creates a culture of continuous improvement — without ever needing to quote a Lean framework.
The bottom line
Improving theatre flow doesn’t have to start with a complex, months-long data project. It can start with a simple template, a committed team, and the discipline to capture and act on data every day.
This approach works because it’s grounded in reality — the reality of your theatres, your team and your specific pain points. It doesn’t require external expertise to get going; it engages staff at every level, and it delivers visible results quickly.
The problems won’t fix themselves. But with the right starting point, they’re far more manageable than they might appear.
Ready to go further?
If this resonates with you and you want to accelerate your theatres flow improvement, I run a Theatres Flow Rapid Improvement Workshop designed specifically for operational theatre teams. It takes this approach further — building on the foundations above with structured problem solving, team facilitation and a clear improvement roadmap tailored to your environment.
Get in touch to find out more.
