Curriculum·R408 The Professional Operating System·about 32 min
The trading plan document
By the end of this lesson you can
- →List the seven sections a trading plan must contain, each pointing at a computed number
- →Explain why a written document changes the behavior of people who already know the material
- →Compute the effect size a checklist produced among experts, and what it implies
- →Distinguish a plan you follow from a document you have
Senior · enrolled learners
This lesson opens with The WHO Surgical Safety Checklist trial, published 2009.
- What happened
- Atul Gawande and colleagues, publishing in the New England Journal of Medicine in January 2009, introduced a nineteen-item surgical safety checklist across eight hospitals in eight cities spanning very different economic circumstances, including Toronto, New Delhi, Amman, Auckland, Manila, Ifakara, London and Seattle. The checklist covered items every operating team already knew, such as confirming the patient's identity, the site of the operation, known allergies, expected blood loss and whether antibiotics had been given. After its introduction the rate of in-hospital death following surgery fell from 1.5 percent to 0.8 percent and the rate of surgical complications fell from 11.0 percent to 7.0 percent.
- The decision point
- Nobody in those operating theatres learned anything. The items were things trained surgical teams already knew, in an environment with more expertise, more supervision and higher stakes than any trading desk. What changed was that the knowledge was written down in a fixed order and checked out loud before the critical phase began, which turned it from something the team knew into something the team had done. A plan is not a summary of what you know. It is the mechanism that makes you act on it when you are busy.
What you will be able to answer
- →What are the seven sections?
- →What did the checklist change?
- →How large was that?
- →Plan or document?
Orientation and Year One are open: anyone can read them without an account. From Year Two onward the lessons are for enrolled learners, because progress through the later years only means anything if it is tracked against a record.
It is free. We do not sell the list and there is nothing to buy at the end of it.
Sources and review
- https://www.nejm.org/doi/full/10.1056/NEJMsa0810119
- https://www.ncbi.nlm.nih.gov/books/NBK143241/
- https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3423101
- https://www.sec.gov/newsroom/press-releases/2013-222
Confidence high·Volatility low·Reviewed 2026-08-07·Owner unassigned
Contested
Later attempts to replicate the checklist result at population scale, including a large Ontario study published in 2014, found smaller or no measurable effects, and the literature since has emphasized that implementation quality rather than the document determines the outcome. Per P6 that is not a weakening of this lesson's point, it is the point: a checklist that is filled in without being performed changes nothing, which is exactly the plan-against-document distinction in part four.
This lesson uses a medical trial rather than a trading case deliberately. No comparable randomized evidence exists for trading plans, and per R405-04 pretending otherwise would be the failure this level spent a course warning about. The transferable claim is about written pre-commitment among experts, not about surgery.
R403-06 owns circuit breakers as thresholds. R405-05 owns the journal schema. This lesson owns the document that assembles them. Keep the splits.