What is a technical assessment?
A technical assessment is a test that checks whether a candidate can actually perform the technical work a role requires. A live coding session, a take-home exercise, a systems design discussion, a calculation, a diagnostic on a real piece of equipment. It produces an output that can be judged against criteria rather than an impression.
It exists because a CV and an interview both record claims. A technical assessment is the only stage of a hiring process that tests the claim directly.
What can a technical assessment establish, and what can it not?
It establishes current capability on a defined problem, and it does so better than any other stage. It does not establish speed of learning, behaviour under sustained pressure, or whether someone will still be good in eighteen months on a codebase nobody has seen yet.
It also has a measurement problem that is worth naming. A test run under time pressure, watched by a stranger, on an unfamiliar problem, measures performance under those conditions. If the job does not look like that, the test is measuring something the job will never ask for.
Is there a limit to how much work a test can ask for?
In Belgium, yes. Collective labour agreement no. 38 on recruitment and selection states that where a selection procedure includes productive work as a practical test, that work may not last longer than is necessary to test the candidate's abilities.
That is a real boundary and it is the one candidates most often need. A two-hour exercise on a synthetic problem tests ability. A five-day build of something the company intends to use does not, and the difference is not subtle. If a take-home assignment produces deliverable work rather than evidence of skill, the question to ask is what it is being used for.
How is a technical assessment different from an assessment centre?
They answer different questions. A technical assessment asks whether you can do the work and has better and worse answers. An assessment centre asks how you operate around the work, through simulations with no correct answer, scored against a competency model.
The practical consequence is that one cannot substitute for the other. A candidate can pass a technical assessment and struggle in a role that is mostly coordination, and the reverse happens just as often. Most of the engineering and technology roles advertised on the Sparagus job board include a technical stage, and knowing which of the two you are walking into changes how you prepare for it.
