This workflow is for MRCEM Intermediate SBA candidates who assumed BMJ OnExamination would be their adaptive engine — and it opens with a coverage correction, because the premise does not hold. As of 19 July 2026, BMJ OnExamination's published emergency-medicine bank targets MRCEM/FRCEM Primary (basic sciences), and we found no dedicated MRCEM Intermediate SBA product. The principal limitation is therefore coverage, not adaptivity. Here is how to build the domain-floored routine you wanted around a bank that actually covers the Intermediate SBA, with BMJ OnExamination in a bounded, honest role.
What BMJ OnExamination offers for MRCEM right now
Current-state box — last checked 19 July 2026; figures vendor-reported and subject to change:
| Item | What we found (vendor-reported, 19 Jul 2026) |
|---|---|
| Emergency-medicine product | Single SBA bank oriented to MRCEM/FRCEM Primary (basic sciences) |
| Stated volume | "590+ FRCEM SBAQ style questions" |
| MRCEM Intermediate SBA bank | None found in the published catalogue |
| Access / price | £39.99 for 1 month's access (Primary product) |
| Adaptive / AI | Free demo billed as "personalised"; no proprietary adaptive engine detailed |
Verify the current catalogue on the BMJ OnExamination emergency-medicine page; vendors add and retire products without notice.
Exam anchor: the Intermediate SBA blueprint
The MRCEM Intermediate SBA is 180 single-best-answer questions in two 120-minute papers of 90 each, set against the 2021 RCEM curriculum (SLOs 1 and 3–7), with no negative marking and roughly 80 seconds per item. The published domain weighting is what your workflow must protect:
| RCEM domain (SLO) | Approx. items | Share |
|---|---|---|
| Complex stable patient (SLO 1) | 55 | 31% |
| Resuscitation / acutely unwell (SLO 3) | 40 | 22% |
| Injured patient (SLO 4) | 30 | 17% |
| Paediatric EM (SLO 5) | 25 | 14% |
| Procedural skills (SLO 6) | 20 | 11% |
| Complex/challenging situations (SLO 7) | 10 | 6% |
The small domains at the bottom — paediatrics, procedures and the complex/challenging situations that cover safeguarding, capacity and end-of-life — are exactly what a weakness-first feed under-samples, and exactly what BMJ OnExamination's Primary bank cannot supply.
Baseline week: measure before you personalise
Pick an Intermediate-capable bank as your learning engine (for example FRCEMTutor or the iatroX MRCEM SBA bank). Before personalising anything, do a small, blueprint-stratified unseen sample — around 15 to 20 items in each of the six SLOs — timed, mixed and unassisted, and record first-attempt accuracy per SLO. This is your reference distribution. Keep the measurement stream separate from the learning bank so your readiness figure is not contaminated by seen items; that separation is the two-Q-bank rule.
First pass: set domain floors
Impose floors so no low-volume SLO can be hidden behind a rising overall score. A workable rule: paediatric EM, procedural skills and complex/challenging situations must each reach a set minimum attempted volume every week before you are allowed to add more complex-stable-patient questions, however tempting the larger domain is. Schedule the small domains first. Floors turn "I'll get to paediatrics later" into a constraint you must satisfy now.
Error taxonomy: label every miss
Do not re-attempt an item until you have labelled why it was wrong:
- Knowledge gap — the fact or pathway was missing.
- Misread stem — misread the vignette or an option.
- Premature closure — committed before reading all options.
- Guideline error — applied outdated standards (resuscitation, sepsis, paediatric dosing).
- Calculation error — infusion, weight-based or corrected-value slip.
- Time-pressure error — a rushed miss you would get right with time.
The label decides the fix and reveals patterns — a run of calculation errors in paediatrics is a different problem from knowledge gaps in toxicology.
Review interval: match the fix to the label
A knowledge gap earns a short source read and a new, differently worded transfer question days later — never an immediate repeat, which only drills recognition. Misreads and time-pressure errors earn pacing practice. Calculation errors earn a short set of similar sums until the method is automatic. Space genuine knowledge gaps at increasing intervals. If a stem exposes a basic-science hole — a receptor mechanism, an acid-base derivation — that is the one moment BMJ OnExamination's Primary bank earns its keep: a bounded session to repair the underpinning, then straight back to Intermediate practice.
Mixed-block switch: when to stop filtering
Move from topic-filtered practice towards timed, random, blueprint-proportioned blocks once your weekly floors are cleared and first-attempt accuracy across SLOs is converging. Filtering builds; mixed timed blocks test. The final phase should be dominated by mixed 90-item blocks at exam pace, because that is what each Intermediate paper is.
Exit criteria: more than bank completion
Taper new questions when all of these hold:
- Coverage floor met in every SLO, including the small ones.
- Stable first-attempt accuracy on unseen, mixed, timed blocks.
- Pacing reliable at ~80 seconds per item.
- Retention shown on previously corrected topics after spacing.
- Official-material calibration against RCEM sample material — the gold standard a finite bank cannot replace.
Completing a bank is not on this list.
Worked example: a seven-day plan for busy trainees
Around ED shifts, one job per tool. No claim is made to any proprietary algorithm; this is a routine you impose with filters and an unseen measurement bank.
| Day | Learning bank job (Intermediate-capable) | BMJ OnExamination job | iatroX job |
|---|---|---|---|
| Mon | 40 items, paediatric EM (floor first) | — | — |
| Tue | 40 items, procedural skills + complex/challenging | — | — |
| Wed | 40 items, resuscitation / injured patient | Optional bounded basic-science repair if a gap surfaced | — |
| Thu | Rework errors by label; no new items | — | — |
| Fri | — | — | Fresh, timed, unseen mixed block; score once |
| Sat | Short read on Friday's weakest SLO | — | — |
| Sun | Rest | — | — |
The Intermediate-capable bank teaches; BMJ OnExamination patches basic-science underpinning only; iatroX measures on unseen, blueprint-mapped items.
Decision checklist: continue, supplement, switch or stop
- Continue using BMJ OnExamination only for MRCEM Primary basic-science repair, never as your Intermediate engine.
- Supplement with an Intermediate-mapped bank plus an unseen measurement bank — the core of any honest Intermediate workflow.
- Switch immediately if you bought the BMJ OnExamination EM product expecting Intermediate coverage; that is a coverage mismatch, not a study problem.
- Stop new questions when the exit criteria are met and official-material calibration is done.
Three mistakes this workflow is designed to stop
Mistake one: buying a Primary bank for an Intermediate sitting. The exam names are close; the content is not. Check the product against the RCEM curriculum before you pay, because a coverage mismatch cannot be fixed by working harder.
Mistake two: letting the comfortable large domain crowd out the small ones. Complex-stable-patient items are plentiful and satisfying to grind; paediatrics, procedures and the complex/challenging strand are where marks quietly leak. Floors first, comfort later.
Mistake three: measuring readiness on seen items. A rising average on questions you have already met is memory, not recall. Only an unseen, timed, blueprint-proportioned block tells you where you actually stand.
Bottom line
For the MRCEM Intermediate SBA, the honest workflow does not run on BMJ OnExamination, because as of 19 July 2026 it does not publish an Intermediate bank. Build the loop on an Intermediate-mapped bank, protect the low-volume SLOs with weekly floors, label every error and route it by cause, and measure readiness on unseen, timed, blueprint-proportioned blocks. Keep BMJ OnExamination, if at all, for the narrow job of basic-science repair. That is a coverage-led routine rather than a completion-led one — and coverage, not completion, is what the exam rewards.
FAQ
Is BMJ OnExamination enough for MRCEM SBA on its own? No. As of 19 July 2026 it does not appear to offer an MRCEM Intermediate SBA bank at all — its emergency-medicine product targets MRCEM/FRCEM Primary basic sciences — so it cannot be your engine for the Intermediate paper, let alone your only resource. Build the workflow on an Intermediate-mapped bank and keep BMJ OnExamination, if at all, for basic-science repair.
Which MRCEM SBA component does BMJ OnExamination not reproduce well? It does not reproduce the Intermediate SBA at all, so every clinical component — complex stable patient management, resuscitation prioritisation, the injured patient, paediatric emergencies, procedural indications and the complex/challenging situations domain — is outside what its Primary basic-science bank rehearses.
How many BMJ OnExamination questions should I complete per day for MRCEM SBA? For the Intermediate exam, none, because it is a Primary bank. Your daily Intermediate volume — a sustainable 40 to 60 well-reviewed items around shifts — should come from an Intermediate-mapped bank; use BMJ OnExamination only in short, targeted bursts if you need to repair a specific basic-science gap.
When should I stop using BMJ OnExamination and move to mixed mocks? If you are sitting the Intermediate SBA you should already be doing Intermediate-mapped practice and moving to mixed unseen mocks as your floors clear, with BMJ OnExamination reserved for occasional basic-science patching. The stopping signal for all filtered practice is stable performance on timed, unseen, blueprint-proportioned blocks, not bank completion.
How should I combine BMJ OnExamination with iatroX without duplicating practice? Give each a distinct job: BMJ OnExamination for Primary basic-science underpinning, an Intermediate-mapped bank for your main learning line, and iatroX for unseen, timed, blueprint-mapped measurement. Because they address different exams and different jobs, nothing is double-counted and your measurement stays clean.
Editorial notes and references
Written by Dr Kolawole Tytler, NHS GP and founder of iatroX. Last checked 19 July 2026. Vendor-reported figures (question counts, prices, access periods and feature descriptions) were taken from the providers' public pages on 19 July 2026 and change without notice — verify the current figures on the product page before purchasing. Disclosure: iatroX operates a competing MRCEM SBA question bank; this workflow confines iatroX to unseen, blueprint-mapped measurement — a job BMJ OnExamination's Primary product does not claim — and does not present it as a like-for-like replacement. Corrections: use the feedback route on iatrox.com and we will amend any error or out-of-date figure.
References