The phrase "a certain method or" is correct and usable in written English.
It can be used when referring to a specific method or approach without naming it directly, often in a context where the method is understood or implied.
Example: "In this study, we will explore a certain method or technique that has shown promising results in previous research."
Alternatives: "a specific approach or" or "a particular technique or".
A proof of concept or a proof of principle study is a research method in which a certain method or model would be recognized to demonstrate its feasibility or to verify that a certain concept, theory, or prototype has the potential of being used.
When you sit around the table with people who have experience with a certain method or approach, you can ask detailed questions and make further appointments to discuss the details.
Blocks of code specific to a certain method or loop are encased between curly brackets.
Do not put yourself into a position where you cannot do a certain method or technique.
The proposed investigation seeks to see if the trends identified by Arendt can can draw adequate comparisons with North Korea, centering itself in the debate if totalitarianism is in-of-itself a legitimate category of a certain method of governance, or if those projects typically associated with totalitarianism (i.e. Nazism, Stalinism, and Juche) are in actuality separate phenomenons.
For (forall iin A), the parameter (S_i^t) ((0le S_i^tle 1)) is defined randomly or with a certain method in the t-th round (t is a positive integer) when i is going to post an article.
Old people have responsibilities, which may prevent them from saving freely or using a certain method.
Red, after several years, turned out to be a certain method.
I left Delhi feeling that there may be a certain method in the madness.
But international observers and the police said the violence possessed a certain method and organization.
De Man may have been a scoundrel who found a career teaching a certain method of reading, but that method of reading does not turn people into scoundrels.
