The phrase "are indispensable when" is correct and usable in written English.
It can be used to indicate that something is essential or necessary in a specific situation or context.
Example: "Effective communication skills are indispensable when working in a team environment."
Alternatives: "are crucial when" or "are essential when".
That's why personal relationships are indispensable when it comes to changing how we talk about religion and atheism.
The portraits, submitted to the Kromfohrl* nder Society, form a visual record and are indispensable when it comes to making breeding decisions.
Such knowledge can offer important insights that are indispensable when discussing the option of vulvar surgery with patients with LS and might prevent potential patient dissatisfaction.
Cogenerating systems based on steam turbines (1 20 MWt) are indispensable when the source of energy is a solid fuel such as bagasse as in a sugar industry.
None of this could have been done in the fully automated detecting regime of hadron colliders that are indispensable when dealing with an environment that contains huge numbers of backgrounds interactions.
These are indispensable when sustained staffing is sought.
There are chains, of course, and they're indispensable when it comes to tracking down the latest Nintendo or Barbie offering.
Engaging citizens and local communities is indispensable when it comes to developing a sense of ownership in local decision-making and service delivery.
Their timelines and family trees might look a touch too much like revision notes, but they're indispensable when it comes to the Wars of the Roses.
They also get a better idea of whether anyone is actually looking at the ads they are paying for.Internet killed the agency starAdvertising agencies used to be indispensable when it came to advising clients where best to place ads.
It is indispensable when you have several million people watching a Grand Prix that they receive another message other than the one of the spectacle, but also one about the new technologies that they could find on their car.
