The phrase "all viable steps" is correct and usable in written English.
You can use it when discussing actions or measures that are practical and feasible in a given context.
Example: "In order to ensure the project's success, we must take all viable steps to address potential risks."
Alternatives: "all feasible measures" or "all practical actions".
Diminishing SES differentials in short-term mortality in the elderly population might thus be a viable step in improving population health, and consequently reduce health care costs.
The preliminary findings suggest that the networked approach may constitute a viable step towards addressing rural health care disparities without the significant resource investments required for construction of standalone facilities.
In particular, we believe that localized surface functionalization and fine-tuning of the geometrical parameters could be a viable step to reach the target of fog collection, which is particularly interesting in view of real technological applications.
It adds: "In the face of the unfolding human catastrophe, there are immediate and viable steps that the government can take to offer sanctuary to more refugees.
Despite challenges in the region and the history of US miscalculations, there remain viable steps the US can take to recalibrate its relationship with Saudi Arabia and throughout the Middle East.
When they hit bad times, the most "economically viable step" for B&Bs is onto this bottom rung of the rental sector.
The Senate rejected a bipartisan compromise amendment to expand gun background checks on Wednesday, casting a 54 to 46 vote that drew sharp responses from supporters who had seen the measure as a small, significant and viable step forward on gun control.
AHP appear to be amenable to further improvements that could lead to its development as an economically viable step in lignocellulose to ethanol conversion.
Answer: All viable answers.
(And this is probably all viable theories).
