The phrase "as a secondary method" is correct and usable in written English.
It can be used when discussing alternative approaches or techniques that are not the primary choice but still valid.
Example: "We will primarily use surveys for data collection, but we can analyze interviews as a secondary method."
Alternatives: "as an alternative approach" or "as a supplementary method."
Last year, Utah enacted a law that reinstated the firing squad as a secondary method should the state fail to obtain the drugs needed for a lethal injection.
The results of the geological structure analysis had low precision; the method is suitable for use as a secondary method to assist other research methods.
The chip cards that are currently being issued did eliminate the magnetic stripe but they continue to use the completely obsolete signature method as a secondary method to authenticate transactions – leaving consumers vulnerable to lost or stolen card fraud.
We could imagine applying this approach as a secondary method if the majority-value technique does not enable unnatural personae to be discovered.
The American Red Cross recommended it only as a secondary method to back-slapping.
Robustness and/or sensitivity analysis is commonly employed as a secondary method for evaluating the suitability of a particular model.
All death penalty states use lethal injection as their primary method of execution, though some also have a secondary method – such as the gas chamber, electric chair or hanging – which in some states are offered to prisoners as an alternative.
Nevertheless, interactions discovered using Y2H screens must be confirmed by a secondary method, such as co-affinity purification, to reduce the risk of false-positive interactions and to increase the confidence in the dataset, which is usually expected to reach >80% [ 20].
In 1986, it was officially recommended as the primary anti-choking technique by the Red Cross, although the organization would reverse that decision in 2006, saying "abdominal thrusts" should only be a secondary method.
This lack of consensus on reading Etest method, which is often used as a secondary testing method to confirm questionable results generated by automated methods, raises the question of which, if any, of the methods are reliable enough to be used for confirmation testing of carbapenem nonsusceptibility, particularly in K. pneumoniae isolates.
Gas injection to improve foamy flow and also to dilute the oil in such reservoirs has been proposed as a secondary recovery method.
