The phrase "action is critical" is correct and usable in written English.
It can be used to emphasize the importance of taking action in a particular situation or context.
Example: "In times of crisis, action is critical to ensure the safety and well-being of everyone involved."
Alternatives: "action is essential" or "taking action is vital."
The timing of the Fed action is critical.
If it goes sour, action is critical, yet action depends on fair monitoring.
As already noted, community action is critical to much of this story.
This is one area where co-ordinated international action is critical.
Yet decisive action is critical, especially now -- notwithstanding the country's low unemployment rate, record-high tax revenues and an export economy that continues to set new records.
Early action is critical because it takes three to four hours for a dose of potassium iodide to affect the thyroid, flushing it with harmless iodine and preventing the absorption of radioactive iodine, officials said.
Those thronging the park who had been unable to get into the venues to watch any live action were critical of the empty seats, which can also be highly embarrassing if shown on television.
Advocates at Population Action are critical of deep cuts in international family planning programs in the Bush administration's 2008 budget proposal, but a Democratic-controlled Congress is likely to reverse them, as the Republican-controlled Congress did last year.
But those thronging the Park yesterday who had been unable to get into the venues to watch any live action were critical of the empty seats, which can also be highly embarrassing if shown on television.
While Mr. Blankfein acknowledged that "government action was critical" in limiting the problems, Mr. Angelides told him: "I'm troubled by your inability to accept the probability or certainty that your firm would not have made it through the storm but for the vast array of federal assistance".
Stackhouse gave a long speech about needing to be ready for the playoffs and the difficulties of sitting out when one is a passionate competitor, but he seemed to agree that his extended respite from game action was critical to his hopes of playing in the postseason.
