"necessary quality" is a valid phrase in English and can be used in both spoken and written English.
For example, you could say, "Leadership is a necessary quality for any successful business."
"However hard we tried we couldn't produce the necessary quality.
In general, this is a desirable and necessary quality.
Forking is a necessary quality control on an evidence rack.
Is realism, "lifeness" or verisimilitude a necessary quality of good literature?
Ambition is a necessary quality, obviously, for anyone who wants to be President.
By Margaret Talbot April 22, 2016 Ambition is a necessary quality for anyone who wants to be President.
By "mediocre art enterprise" I mean: Has the council run its course in terms of doing a necessary quality job?
But the writing is shot through with that "cadence" which he saw as the necessary quality of hard-boiled crime fiction.
Regardless of whether the club signs him or not, his quality is unquestionable... he has the necessary quality to play for Barca.
At festivals and seminars I sometimes exhibit my modesty by claiming that leadership on the battlefield is not always a necessary quality for a biographer such as myself.
Perhaps this is a necessary quality in someone who has spent their life striking attitudes for the media, but there's a splendid defiance to her U-turns.
