The phrase "a key point when" is correct and usable in written English.
It can be used to introduce an important aspect or consideration related to a specific situation or topic.
Example: "A key point when discussing climate change is the impact of human activity on global temperatures."
Alternatives: "an important factor when" or "a crucial aspect when".
Bonding between the adherents represents a key point when dealing with the reinforcement of concrete structures by using FRPs.
Improving their comprehension (e.g., architecture, features, enforced rules, handled data) is a key point when dealing with their evolution/modernization.
The calculation of the gradient of the cost function is a key point when a gradient based method is used.
The study and the comprehension of the mechanism of cell adhesion and cell interaction with a substrate is a key point when biology and medicine meet engineering.
For all that, it's a deeply felt piece of work, something which only Scorsese could have brought to the screen, which finds a key point when Hugo must use a heart-shaped key to operate his automaton.
A key point when defining and evaluating learning objectives is whether they include the ability to anticipate the consequences of decisions and to act appropriately (a proactive rather than reactive approach).
This is a main and key point when trying to act like Amu Hinamori when ever she tries to help others out.
This feature of the work, followed by the proposed solution relying on a data-driven approach, represents the key point when on-line implementations are considered for a viable application of the proposed scheme.
Ernst Benjamin, an old A.A.U.P. hand, makes the key point when he observes that "The A.A.U.P. is not itself a human rights organization".
"The key point when you're specific is that you're accountable," said Robert E. Merrick, a 49-year-old physician who attended today's rally in Quincy.
This is the key point: when we debate the ethics of sponsorship, the only thing we really have to hang on to is values.
