The phrase "a key element when" is correct and usable in written English.
It can be used to indicate an important factor or component in a specific situation or context.
Example: "Communication is a key element when building a successful team."
Alternatives: "an essential factor when" or "a crucial aspect when".
Gauging prognosis is a key element when facing treatment decisions in cancer care.
Accurate computation of forces and deformations on cages under wave and current loads is a key element when designing mooring systems for fish farms.
Simplicity is a key element when it comes to creating a great mobile app.
It was shown that trust is a key element when it comes to data security aims and that users are becoming more involved in the process of creating services.
And this is another one of those fairy tale stories where the look of your movie is such a key element when it comes to the overall success of this picture.
The approaching death was also a key element when nominating this domain.
Another key element: When teachers find an app they want to use, they can proceed to check out, where they'll now have the option to make a purchase order rather than having to use their own credit card and get reimbursed by the school.
As an attorney myself I have seen many brilliant lawyers forget to add that one key element when looking at the facts of the case and applying the law.
Cost and safety are two key elements when designing a good construction site layout planning (CSLP).
Preservation of biodiversity and reduction of deforestation are considered as key elements when addressing an increased use of bioenergy in the future.
Learning and perfecting the ways to make the most of existing infrastructures are the key elements when it comes to sustainable and safe living conditions.
