Onboarding temp and agency workers before the first shift

The Nederlandse Arbeidsinspectie's Monitor arbeidsongevallen 2024, published on 2 October 2025, contains a number worth sitting with. In 18 percent of the investigated accidents the victim was a temp worker, while temp workers make up roughly 4 percent of the working population. In industry it is worse: nearly 25 percent of victims, against an estimated 8 percent of that sector's workforce.

Two honest qualifications. These are investigated accidents, not all accidents, and the workforce share is an estimate. Neither closes the distance between 18 and 4.

The instinctive explanation, that temp workers take more risks, does not survive contact with the floor. The people in that statistic are new, on a site they have never seen, often working in a language that is not the language of the manual, and expected to produce from the first hour. What failed is the onboarding around them. It was built for someone who starts on a Monday and stays five years, not for someone who starts on a Tuesday afternoon and may be gone in three weeks.

Figures and agreements in this guide are as of September 2026: the Monitor arbeidsongevallen 2024 and the CAO voor Uitzendkrachten 2026-2028.

Diagnosis one: the induction assumes a cohort

Most site inductions were designed around an intake: ten people, a room, a set date, a trainer, a couple of hours. That format is not wrong. It describes a group that no longer arrives.

What arrives instead is one person on Tuesday at 13:40, two more on Thursday for a peak lasting nine days, someone covering a sick colleague from 06:00 tomorrow. The induction still exists, so it moves to the next scheduled date, which may be after the worker has left. Meanwhile the person is on the floor, and the gap between arriving and being instructed is the window the accident statistics describe.

The tell is easy: if your induction is a calendar event rather than a state a person is in, you have this problem.

Diagnosis two: two employers, one worker, and an assumption

The second failure is that nobody is quite sure whose job it is. Both countries answer clearly, and in both the answer is split three ways.

Read those together and the failure mode is obvious. Every duty is real, but each depends on the other party having already done something. The client assumes the agency briefed them. The agency assumes the client will instruct on arrival, which is legally correct in Belgium but only happens if someone on site is named for it. Nobody is wrong, and the worker starts uninstructed.

Diagnosis three: the window is twenty minutes

The third problem is arithmetic. The realistic window between a temp worker arriving and being needed on the line is fifteen or twenty minutes, at the entrance, with a shift leader who is already short-handed. Onboarding designed for longer than that window will not be delivered late. It will not be delivered at all.

Three different things have to fit in it, and they are often confused. The general company rules, which barely change. The risks and safety instructions of the specific workpost, which change with every assignment. And the proof that both were delivered to this person on this date. The first is easy to standardise and the least useful alone. The second prevents the accident. The third is what you need when someone asks afterwards.

The playbook

Six moves, none of which needs a training department.

Separate site-generic from workstation-specific. Two contents, two lifespans. Site-generic is the traffic plan, the gates, the alarm, the assembly point, the PPE rules, who to report to: it changes rarely and applies to everyone at that address. Workstation-specific is the machine, the substances, the guard that must stay closed, the manual handling in that cell. It changes with every assignment and it is the part that prevents the accident. Most inductions merge the two, which makes them too long to deliver and too generic to be useful.

Decide who owns each piece, and write it down. One page per client site: who delivers the site block, who delivers the workstation block, who holds the record, who checks before the badge is issued. In Belgium name the member of the hierarchical line, because X.2-11 points at a person, not a department. In the Netherlands name who prepares the art. 5 lid 5 description and who sends it. An unwritten split is the assumption above waiting to happen.

Get the workstation risk description to the agency before the worker arrives. The highest-value change on this list, and it costs a process, not money. If the RI&E extract, or the workstation sheet where one is required, reaches the agency at booking rather than on the first morning, the agency can deliver its article 19 and Waadi art. 11 duty properly, and the worker turns up with the risks already in their head. Day-one instruction then confirms and localises rather than starting from zero.

Make it short enough to happen, and build it per site rather than per person. Ten minutes of site rules and five minutes of workstation content, on a phone at the entrance, gets done. Ninety minutes in a room does not. Built once per site, the same block serves every temp worker who ever goes to that address, which turns onboarding from a repeated effort into an asset you maintain.

Record per person and per site, not per session. A worker doing three assignments at three client sites in a month needs three records, because what they were instructed on differs each time. The first week at a food packer and the third week at a chemicals warehouse share nothing but the habit of being careful: a different traffic plan, different PPE, a different alarm. In Belgium the onthaal adds a document signed per starting worker (Codex art. I.2-11; see onthaal).

Build week two. Almost all temp onboarding stops at the gate. The first days are when someone copies what the person next to them does; the second week is when they work unsupervised at speed. A short follow-up in week two, on what went wrong or nearly went wrong, is cheap and is the piece nobody plans.

If you are the agency

For an agency the break is operational. Placements are confirmed on Friday for Monday, client information arrives in a different format every time, and the RI&E extract or the workstation sheet lands as a PDF in a planner's inbox to be forwarded or filed. The worker receives an address and a start time. Nobody can show, per person and per placement, what they were told.

Be precise about what a certificate covers when a client asks. The SNA keurmerk and the NEN 4400-1 behind it check that an agency is a reliable employer on payroll and tax; they say nothing about safety instruction. VCU does: it is the safety scheme for agencies placing people in higher-risk work, a client requirement rather than a legal one, with audits of how the office selects, instructs, follows up and evaluates the people it places. A VCU auditor asks what your consultants know about the placements they make and whether you can show what each worker received. A VCU certificate is evidence the agency has a process. It is still not evidence that this worker was instructed for this workstation.

How Aristotl handles it

Aristotl builds both blocks from documents you already have: the site rules, the RI&E extract, the workstation sheet, the client's machine instruction. Courses run 3-5 minutes on the worker's own phone, with no laptop and no app installation, which is what makes delivery at the entrance realistic. Each worker reads them in their own language, usually the difference between reading an instruction and nodding at it, and a knowledge check shows it landed. Nothing goes live until you review and publish it.

Each client is set up as a site or team with its own link and QR code. The general safety course is done once; each placement adds that client's course, so someone going to plant A gets plant A and not a repeat of the last address. Completion is viewable per person, per site and per version in the platform, so the worker with three assignments in a month has three records without anyone keeping a spreadsheet.

A first-day checklist can ask for a photo, a choice or a signature per step, and its day log exports as CSV or PDF. When a client changes a rule, a must-acknowledge update goes to the workers at that site, with receipts per named person. VCA, forklift and other certificates are recorded with issuer, dates and proof, and follow the worker from client to client with a verify link instead of a photocopy.

app.aristotl.ai/verify/ACME-FLT-2026-0412

Credential Verified

Valid

Holder

Tom Maes

Credential

Forklift licence

Issued by

Acme Staffing

Expires

12 February 2029

What Aristotl does not do is move the duty. The client stays responsible for the workplace, its risks, practical instruction and supervision; the agency gets a practical way to deliver what it receives, train its own people and record what was completed.

Bring one client site's rules and one workstation sheet to a demo, and we will show what a temp worker starting tomorrow at 13:40 would receive, and what both sides would hold afterwards.