Modern combat punishes late decisions more than execution errors. The operator's problem is not picking the perfect solution: it is closing the decision cycle before the enemy closes theirs. This chapter covers the decision framework under stress, the real time windows available and the 70% rule.
The OODA loop
Observe, Orient, Decide, Act. The value of the model is not the diagram: it is remembering that orientation is where errors are made, not decision. Orientation is the filter composed of experience, doctrine, physiological state and situational picture. Under stress the filter narrows — vision becomes tunnel, hearing loses frequencies, working memory drops to 2–3 elements.
- Observe: raw inputs (visual, radio, physical) — do not interpret yet
- Orient: map the input to a known pattern (drone, MG, indirect, civilian)
- Decide: pick an action from prepared options, not improvised ones
- Act: execute and return to observing the effect
Under effective fire the usable window to decide is measured in single seconds. A 30-second OODA that yields the 'right' solution is beaten by a 4-second OODA that yields a 'good enough' solution. Speed is itself a solution.
The 70% rule
If you have 70% of the information needed and 70% confidence in the plan, execute. Waiting for 90% costs time the enemy uses to recover initiative. The rule is not an excuse for sloppiness: it is recognition that complete information never arrives in the field, and that decision is a pressure tool as much as fire is.
- Below 50%: gather more, displace the problem
- 50–70%: prepare options, retain freedom of choice
- 70%+: decide and execute, accept residual risk
- Wait for 90%: the enemy has already decided for you
Prepared vs improvised decisions
A 'real-time' decision under fire is not invented: it is drawn from a repertoire of options prepared during training and briefing. The wider the repertoire, the less improvisation required. Battle drills — the trained reaction sequences to specific events (frontal contact, indirect, IED) — are the operational embodiment of this principle.
| Event | Prepared decision | Target time |
|---|---|---|
| Frontal contact | Suppress, manoeuvre, communicate | < 5 s |
| Indirect incoming | Disperse, get low, send grid | < 3 s |
| FPV drone heard | Hard cover, EW if available, freeze | < 2 s |
| Suspected IED | Stop, 5/25, mark, bypass | < 10 s |
| Casualty critical | Suppress, MARCH, CASEVAC request | < 30 s |
Stress and decision degradation
Sustained heart rate above 175 bpm collapses complex decision-making. Only trained reflex remains. This is not opinion: it is documented physiology. Training exists to build automatisms that function below the cognitive level.
- Box breathing (4-4-4-4) to bring HR below 150 bpm before deciding
- Limit options to 2 — under stress the brain does not pick between 5
- Decide out loud — verbalising forces structured thought
- Delegate to the lowest possible level — fewer bottlenecks
Common mistakes
- Seeking the perfect plan instead of an executable plan now
- Reconsidering the decision while executing it — mid-action paralysis
- Overloading the team leader with details that should be automatic
- Confusing courage with decision speed (different things)
- Treating orientation as a quick pass instead of the critical phase
- Failing to update the decision when the picture changes (rigid plan trap)
Lessons learned Ukraine
On the Ukrainian front the window between detection and impact has shrunk to minutes, sometimes seconds when an FPV is involved. Units that survive are not those with the best plan — they are those with the tightest decision cycle at squad and fire-team level. The platoon leader who wants to approve every movement loses the war before losing the first soldier. Mission command — clear intent, tactical freedom to the subordinate — is not doctrinal preference: it is a survival condition.