Construction
Working inside a window of hours
You have from one until five in the morning. Anything not settled before you go down gets settled next month.
Your work happens inside a closed interval: one night, four hours, a shutdown scheduled months ahead. **The window cannot be extended and cannot be repeated next week** — the next one may be a month away. That turns any documentary problem, however small, into something that costs not an argument but an entire window.
Where a window is lost
| What fails | When it is discovered | What it costs |
|---|---|---|
| A missing authorisation | On arrival | The whole window |
| A missing personal document | At the checkpoint | That person, or the window |
| A missing equipment document | When trying to bring it in | The work needing that equipment |
| **Something missing from the subcontractor** | **At one in the morning** | **Everything, with no room** |
Important
**What makes this position special is not the documentary demand, it is that it allows no correction in flight.** On a normal site, if a paper is missing it gets emailed in the morning and work continues. Here, at one in the morning, there is nobody to call, no office open and no room: whatever is not closed before leaving for the window does not get closed. Which is why the real work in this position happens days earlier.
The list to close beforehand, not during
- 1
Exactly who is going in that night
By name, not «the usual crew»: the rota changes.
- 2
What equipment goes up and what documents it carries
It is the most forgotten and the most work-blocking.
- 3
What is missing, checked with real notice
Not the day before: with time to obtain it.
- 4
And the same for every subcontractor
Their gap is your gap at the gate.
Watch out
The mistake repeated across every operation of this kind is **checking the documentation on the day**. It is done with good intentions —so it is fresh— and it is exactly when nothing can be fixed any more. The useful check is the one three or four days out, because its purpose is not verifying: it is leaving time to obtain whatever is missing. Checking with no room to act is merely finding out sooner.
Worth knowing
What authorisations, permits to work and accreditations each infrastructure owner requires, and what training or certification each person needs **is determined by the owner and the applicable rules, and settled by your adviser or prevention service**. Here we cover the organisational part: how to reach the window with everything closed rather than discovering it at the gate.
›How far ahead should it be checked?
Far enough to obtain whatever is missing. Never on the day.
›What if someone changes at the last minute?
That is the normal case. Which is why it pays to keep more people current than go in.
›Equipment too?
Yes, and it is the most forgotten because equipment does not complain.
A real case
The situation
At the checkpoint it turns out a technician's paper is missing.
What you do
- Checks per person days in advance
What you get
The gap is covered before setting off for the window.
The situation
The rota changes and someone unplanned goes in.
What you do
- Shows who is current and who is not, per person
What you get
The change is resolved by picking someone who can enter.
The situation
A machine is left outside over its documentation.
What you do
- Stores equipment documentation with the equipment
What you get
What goes in is checked the way people are checked.
The situation
The subcontractor does not send theirs until the eve.
What you do
- Requests and chases with configurable lead time
What you get
The request does not depend on someone insisting.
The situation
Nobody knows what expires before the next window.
What you do
- Warns about expiries with room to act
What you get
Renewals are planned around the window.
The situation
A whole window is lost over one document.
What you do
- Shows the complete status before the appointed day
What you get
The check happens while it can still do something.
This article answers
- night possession works documentation
- what must be ready before entering
- permit to work and prior authorisations
- turned away for missing a document