The phrase "a key requirement when" is correct and usable in written English.
You can use it to introduce an important condition or criterion that must be met in a specific context or situation.
Example: "A key requirement when applying for this position is having at least five years of relevant experience."
Alternatives: "an essential condition when" or "a crucial factor when".
But O'Connor ruled the ICWA was not "narrowly tailored" enough to accomplish its purpose, a key requirement when laws are being challenged on the basis of race.
Employing existing RDF streaming engines with "on-the-fly" analysis of constantly flowing observations from hundreds of sensors is expected to help us achieve near real-time behaviour [36] of the adaptation framework (as opposed to "static" approaches where monitored data is first stored on the hard drive before being analysed) – a key requirement when developing an adaptation mechanism.
Since these chemical gradients direct cell differentiation into specific tissue types and guide cell migration to specific locations [11], [12], controlling these gradients will be a key requirement when engineering complex tissues for organ regeneration.
Being proactive--a key requirement when looking for new opportunities--I contacted some of the people I had met and visited GlaxoWellcome to meet with the person (a fellow physicist) who would later become my manager.
One key requirement when using nanoparticles to image a single molecule behavior is that they must be size-compatible with the biomolecules so as not to produce interference on bioactivity of the labeled biomolecule.
The implication is that, when robustness is a key requirement, designs within the face failure domain are preferred.
In this paper, an empirical study is presented which investigates the suitability of a number of alternative representation formats for classification when interpretability is a key requirement.
For active power control, a key requirement is the power/frequency responses, where inverters are required to reduce their production when the system frequency is over a threshold.
Robust quality of life measurement from the perspective of older people is therefore a key requirement for economic evaluations and a highly important aspect when considering their health and aged care needs [ 5, 10].
Results can be achieved in a sustainable way only when people work together, so that's a key requirement.
A key requirement to do so is to define a certain measure for the HPA nonlinearity, which when reduced often allows NLD to also be reduced.
