The first shift decides the investigation: planning PEEPO before the evidence goes

The first shift decides the investigation: planning PEEPO before the evidence goesEvidence has a half-life. How to plan across people, environment, equipment, procedures and organisation while the site, the records and the memories are still there to collect.An investigation is usually decided in its first shift, well before anybody starts analysing anything. The site gets released back to production. The truck goes back into the fleet and the tread wears another week. The crew who were there go home, talk to each other, read the rumour on the group chat, and come back with a version of events that has quietly converged. None of that is anybody behaving badly. It is what happens while an investigator is still working out who to call.PEEPO exists to get ahead of that. It is a planning lens, not a filing category, and the difference between the two is most of the value.Plan the evidence, then collect itThe common failure is to collect what is easy and label it afterwards. You end up with eleven photographs of the same thing, four interviews with the people who were easiest to reach, and nothing at all from the organisational layer, because nobody wrote down that they needed it while there was still time.Planning first inverts that. Before collection starts, name what you need under each of the five lenses: People, Environment, Equipment, Procedures and Organisation. The plan is a list of questions and the records that would answer them. It will be wrong in places, and that is fine. A plan that is eighty per cent right and written on day one beats a perfect one assembled in week three from whatever survived.The five lenses, and the one everybody underusesPeople, Environment, Equipment and Procedures tend to get populated well, because they are concrete and they are where the event physically happened. Organisation arrives thin, and it is the lens that decides whether the investigation reaches anything systemic.Organisational evidence is ordinary and unglamorous: the maintenance backlog and how work orders are prioritised, the roster pattern in the fortnight before, training records for the competency in question, prior near-misses on the same task and how they were closed out, the handover where a recommendation was raised and lost. If none of that is in the plan on day one, the investigation will find individual and team actions and stop there, because those are the only factors it collected evidence for.Perishable firstNot all evidence decays at the same rate, so the plan needs an order as well as a list. A workable triage:

Gone within hours: the physical scene, weather and ground conditions, lighting, and the state of the equipment before anybody touches it

Gone within days: individual recollection, before it is discussed and reconciled with everybody else's, and any system data on a short retention cycle

Gone within weeks: rosters, shift logs, radio and dispatch records, and contractor documentation held on other people's systems

Durable, so collect it later: procedures, training records, prior incident history, maintenance and work-order history

The first line is why a free-recall interview, taken before the person has compared notes, is worth more than a thorough one taken next week. The last line is why nobody should spend the first afternoon pulling procedures.A plan is not evidenceThe quiet risk in any evidence-planning tool is that a full-looking board starts to feel like a finished job. Twenty-two planned items on a screen is not twenty-two pieces of evidence. It is a to-do list that photographs well.So the plan should track two states separately, planned and collected, and the investigation should not be able to move on because the planning looks complete. Items that turn out not to apply get marked so deliberately, by a person, with the reason recorded. An item nobody could collect is itself worth keeping: evidence that should have existed and did not is often the first sign of an organisational factor.What a good PEEPO plan looks like

Written before collection starts, on the day, even if it is rough

Every item is a question with a named source, not a category label

Organisation is populated as thoroughly as Equipment

Ordered by how fast the evidence decays, not by how easy it is to get

Planned and collected are visibly different states, and completion depends on the second

Items that could not be collected are kept and explained rather than deleted

In SafetyPulse the PEEPO plan and the evidence register are one surface rather than two, so a planned item becomes a collected one when the finding or the interview is actually attached, and an investigation cannot treat planning as collection. That is a small structural point, and it is the difference between an evidence plan and an evidence list. Features · How it works · Methodology · Security · Resources · Book a demo SafetyPulse by ICAM Australia Pty Ltd. ICAM training and methodology.