Further Reading: Day-Of Execution

On the citation tiers, see how-to-use-this-book.md.

This chapter's claims are almost entirely practice, and they map onto two research literatures that are genuinely good: naturalistic decision making, and vigilance under sustained operations. Neither has studied weddings. Both have studied firefighters, nurses, pilots, and watchkeepers doing recognisably the same thing, and reading them will tell you more about §27.3 and §27.7 than anything in the event industry.

Tier 1 — Verifiable published sources

Deciding under time pressure

• Klein, Gary. Sources of Power: How People Make Decisions. The single most relevant book on this list. Klein's recognition-primed decision model — that experts do not compare options, they recognise a situation and simulate one course of action — is a direct challenge to §27.3's "generate two options," and exercise E.1 asks you to reconcile them. Read it and then decide whether this chapter is right.
• Klein, Gary. Streetlights and Shadows. Shorter, and specifically about where standard decision advice fails in the field.
• Kahneman, Daniel. Thinking, Fast and Slow. The other side of the argument, and the two are worth reading against each other. Kahneman and Klein's joint paper, "Conditions for Intuitive Expertise: A Failure to Disagree" (2009), American Psychologist, is the best forty minutes you can spend on this question — it establishes when expert intuition is trustworthy and when it is not.
• Zsambok, Caroline and Gary Klein (eds). Naturalistic Decision Making. The academic collection.

Attention, vigilance, and sustained operations

• Wickens, Christopher D. and others, Engineering Psychology and Human Performance. Chapter 26's recommendation, and here the relevant chapters are on attention allocation and supervisory control — which is exactly what §27.7 describes without the vocabulary.
• The vigilance-decrement literature. Search: vigilance decrement, sustained attention, Mackworth clock test. The finding that detection performance falls measurably within 20–35 minutes of sustained watching is the argument for a sweep being a discrete four-minute act rather than continuous vigilance.
• Any current work on fatigue in long shifts — medical residents, aviation duty limits, maritime watchkeeping. §27.7's resets are a weak version of what those industries mandate, and exercise E.2 asks you to compare honestly.
• Endsley, Mica R., on situation awareness — its three levels (perception, comprehension, projection). The sweep is level-one situation awareness, deliberately scheduled, and Endsley's framework explains why "reachable" is not "present" (§27.6).

Coordination and teams you do not control

• Weick, Karl E. and Kathleen Sutcliffe. Managing the Unexpected. High-reliability organising, and the concepts of deference to expertise and sensitivity to operations are §27.4 and §27.7 respectively.
• Hutchins, Edwin. Cognition in the Wild. On distributed cognition — how a team's knowledge lives in its artefacts and arrangements rather than in heads. It is the theoretical account of why Chapter 26 exists.
• Any text on incident command systems. The ICS's insistence on a single named incident commander, a span of control, and explicit handoffs is §27.4 and §27.8a, formalised by people for whom the stakes are higher.

The emotional labour

• Hochschild, Arlie Russell. The Managed Heart. The founding work on emotional labour, and the source of the honest framing for §27.8's "never look worried" — which is a real cost, borne by the worker, and worth naming as such rather than presenting as a technique.

Tier 2 — Attributed professional practice

• The four triage questions and the notice test. The author's, and exercise D.2 argues the notice test is too low a standard.
• "Two hundred decisions." An estimate. Case Study 27.2's 211 is a constructed tally, and exercise D.5 asks you to design the measurement that would test it.
• The sixty-second decision's four steps. Practice — and in direct tension with Klein's model, which is the most interesting unresolved question in the chapter. The honest position: two options is a corrective for a planner whose first instinct is reflex rather than recognition, and an expert who genuinely recognises the situation may not need it.
• The five things nobody tells a planner. Observation.
• The decision protocol's four clauses. Practice, and the fourth is the author's strongest recommendation in the chapter. It is not standard.
• The position schedule and the ceremony-side finding. Practice, and it is the author's correction of their own long-held habit.
• The sweep: four minutes, fixed route, five times, fix nothing. The author's construction. Its frequency is arbitrary; its discipline is not.
• The three attention sinks, and the claim that reconciling is the most expensive.
• The four visible moments, including the eight seconds at 4:15.

Tier 3 — Illustrative and constructed

All case-study material. Marek Wojcik and his seventeen hours; the Reyes–Whitfield day and its 211 decisions. Constructed.

And a specific note on Case Study 27.2's tally: it is a teaching artefact rather than a record. The ratios it demonstrates — 147 triaged out, 23 decided, 1:57 of looking — are the chapter's argument expressed as numbers, and a reader should treat them as illustrative of a shape rather than as measurements. Case Study 27.1's contrasting tally is the same device, inverted.

Exercise C.1 and the mini-project both exist so that you can produce a real one.

Where to go next

Read Kahneman and Klein's joint paper (2009). Forty minutes, free, and it is the honest treatment of when your instincts should be trusted. Then re-read §27.3 and decide whether four steps is right for you.

Do a sweep and fix nothing (exercise C.3). Four minutes, one route, and it is much harder than it sounds — which is itself the finding.

Count a day (the mini-project). Fifteen-minute blocks, and compute two ratios: decisions triaged out versus decided, and looking versus carrying. One event, and it will change what you do at the next one.

Read Managing the Unexpected for the two concepts that matter here: deference to expertise (your vendors know their work better than you do) and sensitivity to operations (the sweep, given a name by people who run refineries).

And read Hochschild on emotional labour, once, so that "never look worried" is something you have decided to do rather than something you are doing without noticing.

Chapter 28 preview

Crisis management — the rain plan, the no-show, the family, and the hundred smaller things.

Bring the decision protocol. Chapter 28's argument is that a crisis is a decision made under worse conditions than usual, and that almost everything in it was either prepared for in a document or was never going to be.