Suitability of the end in view, as determined by the factor of the further effect desired (if such further effect is indicated),
Feasibility of the effort to attain the end in view, on the basis of comparative resources, as determined by the factors of the means available and opposed, influenced by the factor of the physical conditions prevailing in the field of action, and
Acceptability of the results of the effort involved, as determined by the factor of the consequences as to costs.
If, to take a further example, the known factors include the appropriate effect desired, the means opposed, the physical conditions prevailing in the field of action, and the consequences as to costs, the only unknown remains the means available. The question then is, what means need be made available for the accomplishment of the contemplated effort? The answer to this question may be found in the application of what may be called the principle for the determination of the proper means to be made available in human affairs,—as follows:
In any human activity, the proper means to be made available depend on fulfillment of the requirements of
Suitability of the means (in kind and amount) to accomplish the end in view, as determined by the factor of the appropriate effect desired,
Feasibility of the effort to make such means available on the basis of comparative resources as determined by the factor of the means opposed, influenced by the factor of the physical conditions prevailing in the field of action, and
Acceptability of the results of the effort involved, as determined by the factor of the consequences as to costs.