Ergonomic Assessment: One Desk, Three Depths of Looking, and When Each One Is Enough

Somewhere in your office is a desk that has been looked at three different ways, or should have been. The person sitting at it glanced at their own setup on day one. A DSE assessment checked it against the standard workstation questions some months later. And if that person's wrist has been aching for a season anyway, the desk is now a candidate for the third and deepest look: an ergonomic assessment, the specialist, individual evaluation that exists for exactly the cases the first two depths cannot solve.

Most confusion about ergonomic assessments comes from not distinguishing the three depths, which leads offices to buy specialist assessments for problems a chair adjustment would fix, and, far more expensively, to keep re-running standard checks on problems that need the specialist. So this guide takes the same desk through all three levels: what each one is, what each can and cannot catch, the five triggers that escalate from depth two to depth three, and what an employer actually does with the report that comes back. For the office, finance and tech businesses where almost every employee is a screen worker, this is the escalation path your whole musculoskeletal picture runs on, and musculoskeletal problems remain among the biggest causes of working days lost, as the HSE's MSD hub sets out.

Depth one: the self-check

The first look is the user's own: chair height, screen distance and height, keyboard and mouse position, feet supported, the basics anyone can adjust in five minutes with a decent guide. Depth one matters because it is instant, free, repeatable after every desk move and house move, and because it builds the habit of noticing, which is the raw material of everything deeper.

What depth one cannot do is see what the user cannot: the posture they have normalised, the setup that feels fine and is quietly wrong, the connection between the afternoon headaches and the screen height. Self-checks are the floor of the system, never the system.

Depth two: the DSE assessment

The second look is the structured one the law expects for screen workers: the DSE assessment, a systematic check of the workstation, screen, seating, desk, environment and working patterns against established standards, done for every user, repeated when things change, with findings acted on. Our complete DSE guide covers the discipline in full, and for the large majority of screen workers, depth two done properly is enough: the standard adjustments, the right equipment, the trained habits.

Depth two's limits are built into its virtues. It is standardised, which makes it scalable across a whole workforce and comparable across time, and standardisation is exactly what stops working when the person or the problem is not standard: the existing injury, the condition, the pain that persists after every checklist item is green. A DSE assessment can tell you a workstation meets the standard; it cannot tell you why a particular body is still hurting at it.

Depth three: the ergonomic assessment

The third look is individual and expert: an ergonomic assessment, carried out by a specialist, typically an ergonomist, occupational physiotherapist or similarly qualified professional, of one person, their body, their tasks and their setup as a single system. It is longer and deeper than a DSE check: how this person actually sits, moves and works across a session, the interaction between their health picture and their tasks, and recommendations that are specific rather than standard, particular equipment, task modifications, movement patterns, sometimes changes to how the work itself is arranged.

Being clear about who does what, in the spirit this blog tries to keep: the specialist assessment itself is clinical and professional territory, and the employer's side, our side, is the system around it: knowing when to commission one, briefing it well, and turning its recommendations into dated, owned actions. An ergonomic assessment bought for the wrong case wastes money; one skipped for the right case costs a claim, an absence, or a career, and choosing correctly is what the next section is for.

The five triggers that escalate depth two to depth three

First, persistent symptoms after a good DSE assessment: pain, numbness or strain that survives a properly done and properly actioned depth-two check is the classic trigger, because it says the problem is not the standard setup. Second, an existing condition or injury: a musculoskeletal condition, an injury in recovery, or a disability affecting how someone works turns the generic questions into the wrong questions, and specialist assessment into the reasonable and often legally wise step, since where a condition meets equality law's definition of disability, the adjustment conversation carries legal weight. Third, a return from relevant absence: someone coming back from surgery, injury or long-term musculoskeletal absence should not be returning to a workstation nobody has re-examined for the body they are returning with. Fourth, pregnancy where standard adjustments are not resolving discomfort at the workstation, a case the standard checklist was never designed for. Fifth, non-standard work: the person whose role mixes screen work with other physical tasks, unusual equipment or unusual patterns, where the workstation standard covers only part of the picture.

If none of the five applies, depth two is almost certainly enough, and the money belongs in making the DSE programme genuinely good. If one applies, commissioning the specialist look early is nearly always cheaper than the alternatives, which are absence, agency cover, claims and the slow manufacture of a chronic case from an acute one.

After the report: the employer's half

The assessment returns recommendations, and the pattern this blog keeps finding applies here with full force: expert advice becomes value only through action. The equipment recommended gets bought and, crucially, delivered and set up; the task changes get made and reviewed; the follow-up gets diarised; and the whole file, trigger, assessment, actions, review, gets recorded, because it is exactly the trail a health and safety audit or, in the worst case, a tribunal will ask for. The failure mode is depressingly specific: the specialist chair approved in the report and still in procurement four months later, while the case it was bought for hardens.

At scale, the three depths are one system: self-check guidance for everyone, DSE assessments current across every user and site including home desks, escalation triggers known to the managers who will see them first, specialist assessments commissioned and tracked, and every action dated and owned. That is precisely where consultants and software carry it together, with qualified health and safety consultants building the escalation pathways and the platform keeping every assessment, recommendation and review visible across the estate. For businesses with screen workers in several countries, where the DSE rules and their cousins differ by jurisdiction while wrists do not, international health and safety consultants keep one world-class standard running through every local version, aligned with frameworks such as ISO 45001.

Where Arinite fits

Arinite has spent 15+ years building the systems that make all three depths work: DSE programmes that genuinely reach every desk, escalation triggers that catch the cases early, and the records that turn specialist advice into evidenced action. We support 1,500+ businesses across 50+ countries and have helped protect 100,000+ employees, with a 95% client retention rate. As global health and safety consultants, we run the employer's half of the ergonomic picture across every office and country you operate.

If reading the five triggers brought a specific person in your business to mind, that recognition is the escalation working. Our free gap analysis reviews your arrangements, DSE and ergonomics included, and tells you plainly where you stand. Book your free gap analysis and make sure every desk gets looked at as deeply as its person needs.