The phrase "a decisive man" is correct and usable in written English.
It can be used to describe a man who makes decisions quickly and confidently, often in a leadership or authoritative context.
Example: "In times of crisis, we need a decisive man at the helm to guide us through the challenges ahead."
Alternatives: "a resolute man" or "a determined man".
President Truman fashioned himself as a decisive man who easily and readily made the decision.
Mr Haarde is "not a decisive man", and will try to keep his options open at the congress.
The public see Mr Subianto as a convincing campaigner and a decisive man with good knowledge of defence, because of his military background.
Mr Subianto, from the Great Indonesia Movement Party (Gerindra), is seen as a convincing campaigner and a decisive man with good knowledge of defence, because of his military background.
And in "Man in a hurry," a profile of Bollenbach a few months later, we characterized the former Disney chief financial officer as a decisive man with grand ambitions.
Here, at last, was a strong single-party government led by a decisive "man of action," rather than a fractious coalition led by a reticent octogenarian, who was often unfairly caricatured as uncertain and vacillating.
A quietly decisive man, del Bosque inherited the Euro 2008 winning squad from Luis Aragones, who in turn benefited from arguably the best youth system on earth.
And yet, Modi, a Hindu nationalist, maintains his position atop Indian politics and public opinion largely because of his image as a sincere, decisive man of the people.
The image of an absent-minded chief executive, they said, was an unsophisticated picture of a sharp and decisive man who was sometimes forgetful and inconsistently attentive.
A calm, reflective, decisive man, Lloris even came through the French mutiny when more senior international players lost their heads during the World Cup in 2010.
Another former president, Malcolm Gray, said: "He was a gentle but decisive man for whom cricket always came first and his own ego last.
