The phrase "all workable" is correct and usable in written English.
It can be used to describe multiple options or solutions that are feasible or practical in a given context.
Example: "After reviewing the proposals, we found that all workable solutions were considered for implementation."
Alternatives: "all feasible" or "all practical".
One might be better for a given domain than the other, but they're all workable.
Over 3.8 km of ground-penetrating radar (GPR) lines were collected (in 2006 and 2007) as grids on all workable areas of the proto-esker and associated supraglacial ice-walled canyon-fill sediment.
Those are all workable ideas, but they do not add up to much in the context of a deal that is aiming for $2 trillion to $4 trillion in deficit reduction.
The concrete measures that Miliband has advanced, from capping rail price increases, to legislating for a living wage, from changing government procurement rules to encourage vocational training, to putting workers' representatives on corporate remuneration committees, are all workable, worthwhile policies.
"I would hope that she would now consider that none of this is at all workable unless we get the withdrawal agreement amended and so that any arrangements we make strip out that backstop and leave us with that," he said.
ESMA is supposed to make all this workable.
The SAT's real work lies in their steady process of squatting on farms, not just to protest the fact that all this workable land is lying unused while their owners soak up EU subsidies but also to provide a living for the locally unemployed jornaleros (day laborers).
Anne Barton has remarked, slightly bitterly, that "much of the action takes place in a prison": and certainly the shadow of bars is all a workable set really requires.
Both those notions were reflected in Darmstadt's program: against all odds, a workable overview packed into just over two hours.
Having said all this, a workable peace deal that will satisfy all sides is still an enormous stretch.
